feat(jet): add ExprPtrs for pointer slice expressions

ExprPtrs dereferences []*T values, skips nil entries, and maps survivors
through a converter.

Co-authored-by: Cursor <cursoragent@cursor.com>

.gitignore

@@ -0,0 +1 @@
+coverage.out

CHANGELOG.md

@@ -0,0 +1,30 @@
+# Changelog
+
+## Unreleased (v1.0.0)
+
+### Breaking changes
+
+- Removed `UUID`, `NewUUID`, and `ParseUUID`.
+- Added `StringKSUID` and `BinaryKSUID` with distinct SQL encodings and shared GraphQL string scalar transit.
+- Removed `DBConfig.AutoMigrate`, `SQLOFunc`, and `JSONB.ToMap()`.
+- Replaced `Column` / `ColumnList` intersection interfaces with dialect-neutral type aliases.
+- `Apply*` and `Expr*` helpers now accept `Column` / `ColumnList` / `Expression` aliases instead of `mysql.*` types.
+
+### Added
+
+- `StringKSUID.Equal` / `IsZero`, `BinaryKSUID.Equal` / `IsZero`, and nil sentinel vars for [ApplyInterfacePtr].
+- `Query`, `MustQuery`, and `UpdateOne` helpers (+ Context variants).
+- `WithTxValue` for transactional functions that return a value.
+- `QueryCount`, `BuildQueryCountFn`, and `CountResult` for pagination counts.
+- `StringKSUIDExpr`, `BinaryKSUIDExpr`, `ExprPtrs`, and flexible `Parse*Any` KSUID parsers.
+- `MarshalUint64` and `UnmarshalUint64` for JS-safe GraphQL uint64 scalars.
+- Context-aware variants for all query and mutation helpers.
+- `Delete`, `DeleteAffected`, `WithTx`, `ContainsCol`, and `CurrentDialect()`.
+- Package documentation (`doc.go`), expanded README, and subpackage docs for `dbxm` / `dbxp`.
+- Comprehensive tests for KSUID types, CRUD helpers, column utilities, and module lifecycle.
+
+### Changed
+
+- Debug logger setup returns an error instead of panicking when `DebugLog` is enabled without a dialect logger blank import.
+- `DestName` skips logging when the database module is not initialized.
+- Source reorganized into domain-focused files (`query.go`, `exec.go`, `apply.go`, etc.).

README.md

@@ -1,3 +1,71 @@
 # dbx
 
-dbx (**D**ata**b**ase **E**extensions) is a small toolkit of common and reusable database helpers built around the [Jet](https://github.com/go-jet/jet) SQL builder. Provides an [app.Module](https://gitea.auvem.com/go-toolkit/app).
+**D**ata**b**ase e**x**tensions — a small toolkit of reusable database helpers built on [Jet](https://github.com/go-jet/jet) and [go-toolkit/app](https://gitea.auvem.com/go-toolkit/app).
+
+## Install
+
+```bash
+go get gitea.auvem.com/go-toolkit/dbx
+```
+
+## Quick start
+
+```go
+import (
+    "gitea.auvem.com/go-toolkit/app"
+    "gitea.auvem.com/go-toolkit/dbx"
+    _ "gitea.auvem.com/go-toolkit/dbx/dbxm" // MySQL debug logging only
+)
+
+func main() {
+    cfg := &dbx.DBConfig{
+        User:     "user",
+        Password: "pass",
+        URI:      "localhost:3306",
+        Name:     "mydb",
+        MaxConn:  10,
+    }
+
+    modules := []*app.Module{
+        dbx.ModuleDB(dbx.DialectMySQL, cfg, false),
+    }
+
+    app.Run(modules...)
+    db := dbx.SQLO()
+    _ = db
+}
+```
+
+For Postgres, use `dbx.DialectPostgres` and blank-import `dbxp` instead of `dbxm` when `DebugLog` is enabled.
+
+## Helper catalog
+
+| Area | Functions |
+|------|-----------|
+| Query | `Fetch`, `MustFetch`, `FetchOne`, `MustFetchOne`, `Query`, `MustQuery` (+ `*Context` variants) |
+| Mutations | `Insert`, `InsertReturning`, `Update`, `UpdateAffected`, `UpdateOne`, `UpdateReturning`, `Delete`, `DeleteAffected` (+ `*Context` variants) |
+| Transactions | `WithTx`, `WithTxValue` |
+| Columns | `NormalCols`, `ContainsCol`, `ExprValues`, `ExprPtrs`, `ExprStringers`, `StringKSUIDExpr`, `BinaryKSUIDExpr`, `QueryCount`, `BuildQueryCountFn` |
+| Partial update | `ApplyPtr`, `ApplyComplexPtr`, `ApplyInterfacePtr`, `ApplyVal` |
+| Pointers | `Ptr`, `Val`, `NowPtr`, `TrimPtr`, `TrimPtrToNil`, `IsZero` |
+| Types | `StringKSUID`, `BinaryKSUID`, `JSONB` |
+| GraphQL | `MarshalUint64`, `UnmarshalUint64` |
+
+## KSUID type selection
+
+| Type | SQL column | Storage |
+|------|------------|---------|
+| `StringKSUID` | `VARCHAR(27)`, `TEXT` | Base62 string |
+| `BinaryKSUID` | `BINARY(20)`, `BYTEA` | Raw 20 bytes |
+
+Both types use identical GraphQL string scalar transit. Pick the type that matches your column encoding — Scan rejects ambiguous payloads.
+
+## Dialect notes
+
+- **MySQL inserts:** use `Insert` for `LastInsertId` workflows.
+- **Postgres inserts:** use `InsertReturning` with a Jet `RETURNING` clause.
+- **Debug logging:** requires blank-import of `dbxm` or `dbxp` matching your dialect. Without it, module setup returns an error when `DebugLog` is true.
+
+## Documentation
+
+Package docs are available on pkg.go.dev and via `go doc gitea.auvem.com/go-toolkit/dbx`.

apply.go

@@ -0,0 +1,111 @@
+package dbx
+
+import (
+	"reflect"
+
+	"golang.org/x/exp/constraints"
+)
+
+type ApplyInterface[T any] interface {
+	Equal(T) bool
+	IsZero() bool
+}
+
+// ApplyPtr compares the existing value with a new value and returns the updated value if they differ.
+// If the new value is nil, the existing value is retained. If the new value is a zero-value, the
+// existing value is NOT retained, it will be set to nil. If the value is changed, targetColumn is pushed
+// to updatedColumns.
+func ApplyPtr[T constraints.Float | constraints.Integer | string | bool](
+	existing *T,
+	newVal *T,
+	updatedColumns *ColumnList,
+	targetColumn Column,
+) *T {
+	if newVal == nil {
+		return existing
+	}
+	if reflect.ValueOf(*newVal).IsZero() {
+		newVal = nil
+	}
+	if newVal == nil && existing == nil || newVal != nil && existing != nil && *existing == *newVal {
+		return existing
+	}
+	*updatedColumns = append(*updatedColumns, targetColumn)
+	return newVal
+}
+
+// ApplyComplexPtr compares the existing value with a new value and returns the updated value if they differ.
+// The new value may be of a different type (e.g. existing is uint16 and new is uint64), but it will be
+// converted to match the current type resulting in potential loss of data. If the new value is nil, the
+// existing value is retained. If the new value is a zero-value, the existing value is NOT retained, it
+// will be set to nil. If the value is changed, targetColumn is pushed to updatedColumns.
+func ApplyComplexPtr[
+	Existing constraints.Float | constraints.Integer,
+	New constraints.Float | constraints.Integer,
+](
+	existing *Existing,
+	newVal *New,
+	updatedColumns *ColumnList,
+	targetColumn Column,
+) *Existing {
+	if newVal == nil {
+		return existing
+	}
+	cast := Existing(*newVal)
+	if existing != nil && *existing == cast {
+		return existing
+	}
+	if reflect.ValueOf(cast).IsZero() {
+		if existing != nil {
+			*updatedColumns = append(*updatedColumns, targetColumn)
+		}
+		return nil
+	}
+	*updatedColumns = append(*updatedColumns, targetColumn)
+	return &cast
+}
+
+// ApplyInterfacePtr compares the existing value with a new value and returns the updated value if
+// they differ. Comparable types must have IsZero and Equal methods. If the new value is nil, the
+// existing value is retained. If the new value is a zero-value, the existing value is NOT retained,
+// it will be set to nil. If the value is changed, targetColumn is pushed to updatedColumns.
+func ApplyInterfacePtr[T ApplyInterface[T]](
+	existing *T,
+	newVal *T,
+	updatedColumns *ColumnList,
+	targetColumn Column,
+) *T {
+	if newVal == nil {
+		return existing
+	}
+	if existing != nil && (*existing).Equal(*newVal) {
+		return existing
+	}
+	if (*newVal).IsZero() {
+		if existing != nil {
+			*updatedColumns = append(*updatedColumns, targetColumn)
+		}
+		return nil
+	}
+	*updatedColumns = append(*updatedColumns, targetColumn)
+	return newVal
+}
+
+// ApplyVal compares the existing value with a pointer to a new value and returns the updated value if they
+// differ. If the new value is nil, the existing value is retained. If the value is changed, targetColumn
+// is pushed to updatedColumns
+func ApplyVal[T constraints.Float | constraints.Integer | string | bool](
+	existing T,
+	newVal *T,
+	updatedColumns *ColumnList,
+	targetColumn Column,
+) T {
+	if newVal == nil {
+		return existing
+	}
+	if existing == *newVal {
+		return existing
+	}
+	*updatedColumns = append(*updatedColumns, targetColumn)
+	return *newVal
+}

config.go

@@ -15,7 +15,6 @@ type DBConfig struct {
 	URI         string `validate:"hostname_port,required"`
 	Name        string `validate:"required"`
 	MaxConn  int    `validate:"min=1,max=1000"`
-	AutoMigrate bool
 	DebugLog bool
 }
 

count.go

@@ -0,0 +1,44 @@
+package dbx
+
+import (
+	"fmt"
+
+	"github.com/go-jet/jet/v2/mysql"
+)
+
+// CountResult holds the count from a Jet COUNT query. Use with a SELECT that
+// aliases the count as `CountResult.Count`, for example:
+//
+//	SELECT(mysql.COUNT(col).AS("CountResult.Count"))
+type CountResult struct {
+	Count int
+}
+
+// QueryCountFn counts rows matching pre-bound table and condition parameters.
+type QueryCountFn func(sqlo Queryable) (int, error)
+
+// QueryCount counts rows in tbl matching conds.
+func QueryCount(
+	sqlo Queryable,
+	col Column,
+	tbl ReadableTable,
+	conds BoolExpression,
+) (int, error) {
+	stmt := tbl.SELECT(mysql.COUNT(col).AS("CountResult.Count")).WHERE(conds)
+	var res CountResult
+	if err := stmt.Query(sqlo, &res); err != nil {
+		return 0, fmt.Errorf("query count: %w", err)
+	}
+	return res.Count, nil
+}
+
+// BuildQueryCountFn returns a QueryCountFn with col, tbl, and conds bound.
+func BuildQueryCountFn(
+	col Column,
+	tbl ReadableTable,
+	conds BoolExpression,
+) QueryCountFn {
+	return func(sqlo Queryable) (int, error) {
+		return QueryCount(sqlo, col, tbl, conds)
+	}
+}

count_test.go

@@ -0,0 +1,24 @@
+package dbx
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestCountResult_Scan(t *testing.T) {
+	stmt := mockStatement{
+		queryContextFn: func(_ context.Context, dest any) error {
+			ptr := dest.(*CountResult)
+			ptr.Count = 3
+			return nil
+		},
+	}
+
+	var scanned CountResult
+	err := stmt.Query(mockQueryable{}, &scanned)
+	require.NoError(t, err)
+	assert.Equal(t, 3, scanned.Count)
+}

dbx.go

@@ -1,306 +0,0 @@
-package dbx
-
-import (
-	"context"
-	"database/sql"
-	"errors"
-
-	"gitea.auvem.com/go-toolkit/app"
-	"gitea.auvem.com/go-toolkit/dbx/internal/dbxshared"
-	"github.com/go-jet/jet/v2/qrm"
-)
-
-const (
-	// ModuleDBName is the name of the database module.
-	ModuleDBName = "database"
-
-	// DialectPostgres is the PostgreSQL dialect.
-	DialectPostgres Dialect = "postgres"
-	// DialectMySQL is the MySQL dialect.
-	DialectMySQL Dialect = "mysql"
-)
-
-// Dialect is the SQL dialect used by the database connection.
-type Dialect string
-
-// String implements the Stringer interface for Dialect.
-func (d Dialect) String() string {
-	return string(d)
-}
-
-// SQLOFunc is a function that returns a *sql.DB pointer.
-type SQLOFunc = func() *sql.DB
-
-// Queryable interface is an SQL driver object that can execute SQL statements
-// for Jet.
-type Queryable interface {
-	qrm.Queryable
-	Query(string, ...any) (*sql.Rows, error)
-}
-
-// Executable interface is an SQL driver object that can execute SQL statements
-// for Jet.
-type Executable interface {
-	qrm.Executable
-	Exec(string, ...any) (sql.Result, error)
-}
-
-// ExecutableTx interface is an SQL driver object that implements the Executable
-// interface and can also begin a transaction.
-type ExecutableTx interface {
-	Executable
-	Begin() (*sql.Tx, error)
-}
-
-// QueryExec interface is an SQL driver object that can execute SQL statements for Jet
-// and query results.
-type QueryExec interface {
-	Queryable
-	Executable
-}
-
-// QueryExecTx interface is an SQL driver object that can execute SQL statements for
-// Jet, query results, and begin a transaction.
-type QueryExecTx interface {
-	Queryable
-	ExecutableTx
-}
-
-// Statement is a common Jet statement for all SQL operations.
-type Statement interface {
-	Query(db qrm.Queryable, destination any) error
-	QueryContext(ctx context.Context, db qrm.Queryable, destination any) error
-	Exec(db qrm.Executable) (sql.Result, error)
-	ExecContext(ctx context.Context, db qrm.Executable) (sql.Result, error)
-}
-
-// dbState stores package-level state for the database connection.
-type dbState struct {
-	// sqlDB stores the current SQL database handle.
-	sqlDB *sql.DB
-
-	// config stores the database connection configuration.
-	config *DBConfig
-
-	// dialect is the SQL dialect used by the database connection.
-	dialect Dialect
-
-	// debugLog indicates whether debug logging is enabled.
-	debugLog bool
-}
-
-var (
-	// ErrNoRows is returned when a query returns no rows.
-	ErrNoRows = qrm.ErrNoRows
-
-	// ErrValueIsZero is returned when an expected value is missing.
-	ErrValueIsZero = errors.New("value is zero-value for type")
-
-	state = dbState{}
-)
-
-// SQLO returns the current SQL database handle.
-func SQLO() *sql.DB {
-	dbxshared.DBModule.RequireLoaded("dbx.SQLO requires database module") // ensure the module is loaded before accessing the database
-	if state.sqlDB == nil {
-		panic("SQL database not initialized")
-	}
-	return state.sqlDB
-}
-
-// ModuleDB returns the database module with the provided configuration.
-// dialect specifies the SQL dialect to use (e.g., DialectPostgres, DialectMySQL).
-// config specifies the database connection configuration.
-// forceDebugLog forces debug logging to be enabled regardless of the config setting.
-func ModuleDB(dialect Dialect, config *DBConfig, forceDebugLog bool) *app.Module {
-	if dbxshared.DBModule != nil {
-		panic("ModuleDB initialized multiple times")
-	}
-	if config == nil {
-		panic("ModuleDB requires a non-nil DBConfig")
-	}
-
-	state.config = config                             // store configuration at package level
-	state.dialect = dialect                           // store dialect at package level
-	state.debugLog = config.DebugLog || forceDebugLog // force debug logging if requested
-
-	dbxshared.DBModule = app.NewModule(ModuleDBName, app.ModuleOpts{
-		Setup:    setupDB,
-		Teardown: teardownDB,
-	})
-
-	return dbxshared.DBModule
-}
-
-// Fetch queries the database and returns the result as a slice. If the query
-// returns no rows, it returns an empty slice and no error.
-func Fetch[T any](sqlo Queryable, stmt Statement) ([]*T, error) {
-	var result []*T
-	if err := stmt.Query(sqlo, &result); err != nil && !errors.Is(err, ErrNoRows) {
-		return nil, err
-	}
-	return result, nil
-}
-
-// MustFetch queries the database and returns the result as a slice. If the query
-// returns no rows, it returns an empty slice and the desired error.
-func MustFetch[T any](sqlo Queryable, stmt Statement, notFoundErr error) ([]*T, error) {
-	result, err := Fetch[T](sqlo, stmt)
-	if err != nil {
-		return nil, err
-	}
-	if len(result) == 0 {
-		return nil, notFoundErr // return the desired error if no rows found
-	}
-	return result, nil // return the fetched results
-}
-
-// FetchOne queries the database and returns a single result. If the query
-// returns no rows, it returns nil and no error.
-func FetchOne[T any](sqlo Queryable, stmt Statement) (*T, error) {
-	result, err := Fetch[T](sqlo, stmt)
-	if err != nil {
-		return nil, err
-	}
-	if len(result) == 0 {
-		return nil, nil // no rows found, return nil
-	}
-	return result[0], nil // return the first (and only) result
-}
-
-// MustFetchOne queries the database and returns a single result. If the query
-// returns no rows, it returns nil and the desired error.
-func MustFetchOne[T any](sqlo Queryable, stmt Statement, notFoundErr error) (*T, error) {
-	result, err := MustFetch[T](sqlo, stmt, notFoundErr)
-	if err != nil {
-		return nil, err
-	}
-	return result[0], nil // return the first (and only) result
-}
-
-// Insert executes an insert statement, returning the last inserted ID or an
-// error if the insert fails.
-func Insert(sqlo Executable, stmt Statement) (uint64, error) {
-	res, err := stmt.Exec(sqlo)
-	if err != nil {
-		return 0, err
-	}
-
-	id, err := res.LastInsertId()
-	if err != nil {
-		return 0, err
-	}
-
-	if id < 1 {
-		return 0, errors.New("inserted ID is less than 1")
-	}
-
-	return uint64(id), nil
-}
-
-// InsertReturning executes an insert statement that returns the inserted row.
-// The statement MUST be a Jet InsertStatement with a RETURNING clause. Returns
-// the inserted row object T or an error if the insert fails or no rows are returned.
-func InsertReturning[T any](sqlo Queryable, stmt Statement) (*T, error) {
-	var result T
-	err := stmt.Query(sqlo, &result)
-	if err != nil {
-		return nil, err
-	}
-	return &result, nil
-}
-
-// Update executes an update statement, returning an error if the update fails.
-func Update(sqlo Executable, stmt Statement) error {
-	_, err := stmt.Exec(sqlo)
-	return err
-}
-
-// UpdateAffected executes an update statement and returns the number of rows
-// affected and an error if any.
-func UpdateAffected(sqlo Executable, stmt Statement) (int64, error) {
-	res, err := stmt.Exec(sqlo)
-	if err != nil {
-		return 0, err
-	}
-
-	rowsAffected, err := res.RowsAffected()
-	if err != nil {
-		return 0, err
-	}
-
-	return rowsAffected, nil
-}
-
-// UpdateReturning executes an update statement that returns the updated row.
-// The statement MUST be a Jet UpdateStatement with a RETURNING clause. Returns
-// the updated row object T or an error if the update fails or no rows are returned.
-func UpdateReturning[T any](sqlo Queryable, stmt Statement) (*T, error) {
-	var result T
-	err := stmt.Query(sqlo, &result)
-	if err != nil {
-		return nil, err
-	}
-	return &result, nil
-}
-
-// setupDB connects to the database.
-func setupDB(m *app.Module) error {
-	if state.sqlDB != nil && state.sqlDB.Ping() == nil {
-		m.Logger().Warn("Database connection already established")
-		return nil
-	}
-
-	logArgs := []any{
-		"user", state.config.User,
-		"name", state.config.Name,
-		"uri", state.config.URI,
-		"dialect", state.dialect,
-	}
-
-	var err error
-	state.sqlDB, err = sql.Open(string(state.dialect), state.config.ConnectionString(state.dialect))
-	if err != nil {
-		logArgs = append(logArgs, "err", err)
-		m.Logger().Error("Couldn't open SQL database", logArgs...)
-		return err
-	}
-
-	if err := state.sqlDB.Ping(); err != nil {
-		logArgs = append(logArgs, "err", err)
-		m.Logger().Error("Couldn't ping SQL database", logArgs...)
-		return err
-	}
-
-	state.sqlDB.SetMaxOpenConns(state.config.MaxConn)
-
-	stats := state.sqlDB.Stats()
-	m.Logger().Info(
-		"Connected to SQL database",
-		"user", state.config.User,
-		"name", state.config.Name,
-		"uri", state.config.URI,
-		"maxConnections", stats.MaxOpenConnections,
-		"currConnections", stats.OpenConnections,
-	)
-
-	if state.debugLog {
-		dbxshared.InitLogger(state.dialect) // initialize the logger for the specified dialect
-	}
-
-	return nil
-}
-
-// teardownDB closes the database connection.
-func teardownDB(m *app.Module) error {
-	if state.sqlDB == nil {
-		return nil
-	}
-
-	if err := state.sqlDB.Close(); err != nil {
-		m.Logger().Error("Couldn't close database", "err", err)
-		return err
-	}
-	m.Logger().Info("Closed database connection")
-	return nil
-}

dbxm/doc.go

@@ -0,0 +1,7 @@
+// Package dbxm registers the MySQL Jet query debug logger for dbx.
+//
+// Blank-import this package when using dbx with MySQL and [dbx.DBConfig.DebugLog]
+// is enabled:
+//
+//	import _ "gitea.auvem.com/go-toolkit/dbx/dbxm"
+package dbxm

dbxm/mysql_test.go

@@ -0,0 +1,15 @@
+package dbxm_test
+
+import (
+	"testing"
+
+	"gitea.auvem.com/go-toolkit/dbx"
+	"gitea.auvem.com/go-toolkit/dbx/internal/dbxshared"
+	_ "gitea.auvem.com/go-toolkit/dbx/dbxm"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestMySQLDebugLoggerRegistered(t *testing.T) {
+	err := dbxshared.InitLogger(dbx.DialectMySQL)
+	assert.NoError(t, err)
+}

dbxp/doc.go

@@ -0,0 +1,7 @@
+// Package dbxp registers the Postgres Jet query debug logger for dbx.
+//
+// Blank-import this package when using dbx with Postgres and [dbx.DBConfig.DebugLog]
+// is enabled:
+//
+//	import _ "gitea.auvem.com/go-toolkit/dbx/dbxp"
+package dbxp

dbxp/pxg_test.go

@@ -0,0 +1,15 @@
+package dbxp_test
+
+import (
+	"testing"
+
+	"gitea.auvem.com/go-toolkit/dbx"
+	"gitea.auvem.com/go-toolkit/dbx/internal/dbxshared"
+	_ "gitea.auvem.com/go-toolkit/dbx/dbxp"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestPostgresDebugLoggerRegistered(t *testing.T) {
+	err := dbxshared.InitLogger(dbx.DialectPostgres)
+	assert.NoError(t, err)
+}

dest.go

@@ -0,0 +1,45 @@
+package dbx
+
+import (
+	"reflect"
+	"strings"
+
+	"gitea.auvem.com/go-toolkit/dbx/internal/dbxshared"
+)
+
+// DestName returns the name of the type passed as `destTypeStruct` as a string,
+// normalized for compatibility with the Jet QRM.
+func DestName(destTypeStruct any, path ...string) string {
+	v := reflect.ValueOf(destTypeStruct)
+	for v.Kind() == reflect.Pointer {
+		v = v.Elem()
+	}
+
+	destIdent := v.Type().String()
+	destIdent = destIdent[strings.LastIndex(destIdent, ".")+1:]
+
+	for i, p := range path {
+		if v.Kind() != reflect.Struct {
+			destNameLogError("DestName: path parent is not a struct", destIdent+"."+strings.Join(path[:i+1], "."))
+			return ""
+		}
+
+		v = v.FieldByName(p)
+
+		if !v.IsValid() {
+			destNameLogError("DestName: field does not exist", destIdent+"."+strings.Join(path[:i+1], "."))
+			return ""
+		}
+
+		destIdent += "." + p
+	}
+
+	return destIdent
+}
+
+func destNameLogError(msg, path string) {
+	if dbxshared.DBModule == nil {
+		return
+	}
+	dbxshared.DBModule.Logger().Error(msg, "path", path)
+}

doc.go

@@ -0,0 +1,59 @@
+// Package dbx provides database utilities built on go-jet/jet and go-toolkit/app.
+//
+// # Module lifecycle
+//
+// Call [ModuleDB] once to register the database [app.Module], then use [SQLO]
+// to access the connection pool. [CurrentDialect] reports the configured dialect.
+// Only one database per process is supported.
+//
+// # Query and mutation helpers
+//
+// [Fetch], [FetchOne], [Query], [Insert], [Update], [Delete], and their Must*
+// and Context variants wrap Jet [Statement] execution with consistent error
+// semantics. [UpdateOne] requires at least one row affected.
+// [WithTx] and [WithTxValue] run functions inside SQL transactions.
+//
+// # Jet column utilities
+//
+// Dialect-neutral type aliases ([Column], [ColumnList]) and helpers for column
+// lists ([NormalCols], [ContainsCol]) and expression building ([ExprValues],
+// [ExprPtrs], [StringKSUIDExpr], [BinaryKSUIDExpr]).
+// [QueryCount] and [BuildQueryCountFn] support pagination total counts.
+//
+// Partial-update helpers ([ApplyPtr], [ApplyVal]) track changed fields for
+// repository patch logic.
+//
+// # Identifier types
+//
+// [StringKSUID] and [BinaryKSUID] wrap segmentio/ksuid with storage-specific
+// SQL encoding. Both implement [ApplyInterface] via Equal and IsZero for use
+// with [ApplyInterfacePtr]. Expr returns a Jet expression via [StringKSUIDExpr]
+// or [BinaryKSUIDExpr]. Both share identical GraphQL string scalar transit.
+// Choose StringKSUID for text columns (VARCHAR, TEXT); choose BinaryKSUID for
+// binary columns (BINARY(20), BYTEA). [ParseStringKSUIDAny] and
+// [ParseBinaryKSUIDAny] accept flexible input for API boundaries.
+//
+// [JSONB] provides map-based JSON column scanning for Postgres JSONB and MySQL JSON.
+//
+// # GraphQL scalars
+//
+// [MarshalUint64] and [UnmarshalUint64] provide JS-safe uint64 serialization for
+// gqlgen without importing gqlgen directly.
+//
+// # Pointer and string utilities
+//
+// [Ptr], [Val], [TrimPtr], [StringToFilter], and related helpers for nullable
+// field handling in repository code.
+//
+// # Debug logging
+//
+// Enable [DBConfig.DebugLog] and blank-import dbxm (MySQL) or dbxp (Postgres)
+// to register Jet query debug output. Setup returns an error if DebugLog is
+// enabled without the matching blank import.
+//
+// # Dialect notes
+//
+// Use [Insert] with LastInsertId on MySQL; Postgres callers should use
+// [InsertReturning]. [InsertReturning] and [UpdateReturning] require Jet
+// RETURNING clauses.
+package dbx

exec.go

@@ -0,0 +1,145 @@
+package dbx
+
+import (
+	"context"
+	"errors"
+)
+
+// Insert executes an insert statement, returning the last inserted ID or an
+// error if the insert fails.
+func Insert(sqlo Executable, stmt Statement) (uint64, error) {
+	return InsertContext(context.Background(), sqlo, stmt)
+}
+
+// InsertContext is the context-aware variant of [Insert].
+func InsertContext(ctx context.Context, sqlo Executable, stmt Statement) (uint64, error) {
+	res, err := stmt.ExecContext(ctx, sqlo)
+	if err != nil {
+		return 0, err
+	}
+
+	id, err := res.LastInsertId()
+	if err != nil {
+		return 0, err
+	}
+
+	if id < 1 {
+		return 0, errors.New("inserted ID is less than 1")
+	}
+
+	return uint64(id), nil
+}
+
+// InsertReturning executes an insert statement that returns the inserted row.
+// The statement MUST be a Jet InsertStatement with a RETURNING clause. Returns
+// the inserted row object T or an error if the insert fails or no rows are returned.
+func InsertReturning[T any](sqlo Queryable, stmt Statement) (*T, error) {
+	return InsertReturningContext[T](context.Background(), sqlo, stmt)
+}
+
+// InsertReturningContext is the context-aware variant of [InsertReturning].
+func InsertReturningContext[T any](ctx context.Context, sqlo Queryable, stmt Statement) (*T, error) {
+	return queryReturningContext[T](ctx, sqlo, stmt)
+}
+
+// Update executes an update statement, returning an error if the update fails.
+func Update(sqlo Executable, stmt Statement) error {
+	return UpdateContext(context.Background(), sqlo, stmt)
+}
+
+// UpdateContext is the context-aware variant of [Update].
+func UpdateContext(ctx context.Context, sqlo Executable, stmt Statement) error {
+	_, err := stmt.ExecContext(ctx, sqlo)
+	return err
+}
+
+// UpdateAffected executes an update statement and returns the number of rows
+// affected and an error if any.
+func UpdateAffected(sqlo Executable, stmt Statement) (int64, error) {
+	return UpdateAffectedContext(context.Background(), sqlo, stmt)
+}
+
+// UpdateAffectedContext is the context-aware variant of [UpdateAffected].
+func UpdateAffectedContext(ctx context.Context, sqlo Executable, stmt Statement) (int64, error) {
+	res, err := stmt.ExecContext(ctx, sqlo)
+	if err != nil {
+		return 0, err
+	}
+
+	rowsAffected, err := res.RowsAffected()
+	if err != nil {
+		return 0, err
+	}
+
+	return rowsAffected, nil
+}
+
+// UpdateOne executes an update statement and returns notFoundErr if zero rows
+// were affected.
+func UpdateOne(sqlo Executable, stmt Statement, notFoundErr error) error {
+	return UpdateOneContext(context.Background(), sqlo, stmt, notFoundErr)
+}
+
+// UpdateOneContext is the context-aware variant of [UpdateOne].
+func UpdateOneContext(ctx context.Context, sqlo Executable, stmt Statement, notFoundErr error) error {
+	n, err := UpdateAffectedContext(ctx, sqlo, stmt)
+	if err != nil {
+		return err
+	}
+	if n == 0 {
+		return notFoundErr
+	}
+	return nil
+}
+
+// UpdateReturning executes an update statement that returns the updated row.
+// The statement MUST be a Jet UpdateStatement with a RETURNING clause. Returns
+// the updated row object T or an error if the update fails or no rows are returned.
+func UpdateReturning[T any](sqlo Queryable, stmt Statement) (*T, error) {
+	return UpdateReturningContext[T](context.Background(), sqlo, stmt)
+}
+
+// UpdateReturningContext is the context-aware variant of [UpdateReturning].
+func UpdateReturningContext[T any](ctx context.Context, sqlo Queryable, stmt Statement) (*T, error) {
+	return queryReturningContext[T](ctx, sqlo, stmt)
+}
+
+// Delete executes a delete statement, returning an error if the delete fails.
+func Delete(sqlo Executable, stmt Statement) error {
+	return DeleteContext(context.Background(), sqlo, stmt)
+}
+
+// DeleteContext is the context-aware variant of [Delete].
+func DeleteContext(ctx context.Context, sqlo Executable, stmt Statement) error {
+	_, err := stmt.ExecContext(ctx, sqlo)
+	return err
+}
+
+// DeleteAffected executes a delete statement and returns the number of rows
+// affected and an error if any.
+func DeleteAffected(sqlo Executable, stmt Statement) (int64, error) {
+	return DeleteAffectedContext(context.Background(), sqlo, stmt)
+}
+
+// DeleteAffectedContext is the context-aware variant of [DeleteAffected].
+func DeleteAffectedContext(ctx context.Context, sqlo Executable, stmt Statement) (int64, error) {
+	res, err := stmt.ExecContext(ctx, sqlo)
+	if err != nil {
+		return 0, err
+	}
+
+	rowsAffected, err := res.RowsAffected()
+	if err != nil {
+		return 0, err
+	}
+
+	return rowsAffected, nil
+}
+
+func queryReturningContext[T any](ctx context.Context, sqlo Queryable, stmt Statement) (*T, error) {
+	var result T
+	if err := stmt.QueryContext(ctx, sqlo, &result); err != nil {
+		return nil, err
+	}
+	return &result, nil
+}

exec_test.go

@@ -0,0 +1,122 @@
+package dbx
+
+import (
+	"context"
+	"database/sql"
+	"errors"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestInsert_ReturnsLastInsertID(t *testing.T) {
+	stmt := mockStatement{
+		execContextFn: func(_ context.Context) (sql.Result, error) {
+			return mockResult{lastInsertID: 42}, nil
+		},
+	}
+
+	id, err := Insert(mockExecutable{}, stmt)
+	require.NoError(t, err)
+	assert.Equal(t, uint64(42), id)
+}
+
+func TestInsert_RejectsZeroID(t *testing.T) {
+	stmt := mockStatement{
+		execContextFn: func(_ context.Context) (sql.Result, error) {
+			return mockResult{lastInsertID: 0}, nil
+		},
+	}
+
+	_, err := Insert(mockExecutable{}, stmt)
+	assert.Error(t, err)
+}
+
+func TestInsertReturning_ReturnsRow(t *testing.T) {
+	stmt := mockStatement{
+		queryContextFn: func(_ context.Context, dest any) error {
+			ptr := dest.(*row)
+			ptr.ID = 7
+			return nil
+		},
+	}
+
+	result, err := InsertReturning[row](mockQueryable{}, stmt)
+	require.NoError(t, err)
+	require.NotNil(t, result)
+	assert.Equal(t, 7, result.ID)
+}
+
+func TestUpdateAffected_ReturnsCount(t *testing.T) {
+	stmt := mockStatement{
+		execContextFn: func(_ context.Context) (sql.Result, error) {
+			return mockResult{rowsAffected: 3}, nil
+		},
+	}
+
+	n, err := UpdateAffected(mockExecutable{}, stmt)
+	require.NoError(t, err)
+	assert.Equal(t, int64(3), n)
+}
+
+func TestUpdateOne_NotFound(t *testing.T) {
+	errNotFound := errors.New("not found")
+	stmt := mockStatement{
+		execContextFn: func(_ context.Context) (sql.Result, error) {
+			return mockResult{rowsAffected: 0}, nil
+		},
+	}
+
+	err := UpdateOne(mockExecutable{}, stmt, errNotFound)
+	assert.ErrorIs(t, err, errNotFound)
+}
+
+func TestUpdateOne_Success(t *testing.T) {
+	stmt := mockStatement{
+		execContextFn: func(_ context.Context) (sql.Result, error) {
+			return mockResult{rowsAffected: 1}, nil
+		},
+	}
+
+	err := UpdateOne(mockExecutable{}, stmt, errors.New("not found"))
+	require.NoError(t, err)
+}
+
+func TestDelete_Succeeds(t *testing.T) {
+	called := false
+	stmt := mockStatement{
+		execContextFn: func(_ context.Context) (sql.Result, error) {
+			called = true
+			return mockResult{}, nil
+		},
+	}
+
+	err := Delete(mockExecutable{}, stmt)
+	require.NoError(t, err)
+	assert.True(t, called)
+}
+
+func TestDeleteAffected_ReturnsCount(t *testing.T) {
+	stmt := mockStatement{
+		execContextFn: func(_ context.Context) (sql.Result, error) {
+			return mockResult{rowsAffected: 2}, nil
+		},
+	}
+
+	n, err := DeleteAffected(mockExecutable{}, stmt)
+	require.NoError(t, err)
+	assert.Equal(t, int64(2), n)
+}
+
+func TestExecContext_PropagatesError(t *testing.T) {
+	wantErr := errors.New("exec failed")
+	stmt := mockStatement{
+		execContextFn: func(_ context.Context) (sql.Result, error) {
+			return nil, wantErr
+		},
+	}
+
+	err := DeleteContext(context.Background(), mockExecutable{}, stmt)
+	assert.ErrorIs(t, err, wantErr)
+}

filter.go

@@ -0,0 +1,13 @@
+package dbx
+
+import "strings"
+
+// StringToFilter processes a string to be used as a filter in an SQL LIKE
+// statement. It replaces all spaces with % and adds % to the beginning and
+// end of the string.
+func StringToFilter(str string) string {
+	str = strings.Trim(str, "%")
+	str = strings.ReplaceAll(str, " ", "%")
+	str = "%" + str + "%"
+	return str
+}

go.mod

@@ -13,13 +13,20 @@ require (
 
 require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/dustin/go-humanize v1.0.1 // indirect
 	github.com/google/uuid v1.6.0 // indirect
 	github.com/kr/text v0.2.0 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/ncruces/go-strftime v1.0.0 // indirect
 	github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
-	golang.org/x/sys v0.33.0 // indirect
+	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
+	golang.org/x/sys v0.44.0 // indirect
 	gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
+	modernc.org/libc v1.73.4 // indirect
+	modernc.org/mathutil v1.7.1 // indirect
+	modernc.org/memory v1.11.0 // indirect
+	modernc.org/sqlite v1.53.0 // indirect
 )

go.sum

@@ -3,6 +3,8 @@ gitea.auvem.com/go-toolkit/app v0.0.0-20250530181559-231561c92698/go.mod h1:a7EN
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
+github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
 github.com/fatih/color v1.18.0 h1:S8gINlzdQ840/4pfAwic/ZE0djQEH3wM94VfqLTZcOM=
 github.com/fatih/color v1.18.0/go.mod h1:4FelSpRwEGDpQ12mAdzqdOukCy4u8WUtOY6lkT/6HfU=
 github.com/go-jet/jet/v2 v2.13.0 h1:DcD2IJRGos+4X40IQRV6S6q9onoOfZY/GPdvU6ImZcQ=
@@ -20,10 +22,14 @@ github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovk
 github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
 github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
 github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
+github.com/ncruces/go-strftime v1.0.0 h1:HMFp8mLCTPp341M/ZnA4qaf7ZlsbTc+miZjCLOFAw7w=
+github.com/ncruces/go-strftime v1.0.0/go.mod h1:Fwc5htZGVVkseilnfgOVb9mKy6w1naJmn9CehxcKcls=
 github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e h1:fD57ERR4JtEqsWbfPhv4DMiApHyliiK5xCTNVSPiaAs=
 github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e/go.mod h1:zD1mROLANZcx1PVRCS0qkT7pwLkGfwJo4zjcN/Tysno=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec h1:W09IVJc94icq4NjY3clb7Lk8O1qJ8BdBEF8z0ibU0rE=
+github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec/go.mod h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo=
 github.com/segmentio/ksuid v1.0.4 h1:sBo2BdShXjmcugAMwjugoGUdUV0pcxY5mW4xKRn3v4c=
 github.com/segmentio/ksuid v1.0.4/go.mod h1:/XUiZBD3kVx5SmUOl55voK5yeAbBNNIed+2O73XgrPE=
 github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
@@ -34,8 +40,18 @@ golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.33.0 h1:q3i8TbbEz+JRD9ywIRlyRAQbM0qF7hu24q3teo2hbuw=
 golang.org/x/sys v0.33.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
+golang.org/x/sys v0.44.0 h1:ildZl3J4uzeKP07r2F++Op7E9B29JRUy+a27EibtBTQ=
+golang.org/x/sys v0.44.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f h1:BLraFXnmrev5lT+xlilqcH8XK9/i0At2xKjWk4p6zsU=
 gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+modernc.org/libc v1.73.4 h1:+ra4Ui8ngyt8HDcO1FTDPWlkAh6yOdaO2yAoh8MddQA=
+modernc.org/libc v1.73.4/go.mod h1:DXZ3eO8qMCNn2SnmTNCiC71nJ9Rcq3PsnpU6Vc4rWK8=
+modernc.org/mathutil v1.7.1 h1:GCZVGXdaN8gTqB1Mf/usp1Y/hSqgI2vAGGP4jZMCxOU=
+modernc.org/mathutil v1.7.1/go.mod h1:4p5IwJITfppl0G4sUEDtCr4DthTaT47/N3aT6MhfgJg=
+modernc.org/memory v1.11.0 h1:o4QC8aMQzmcwCK3t3Ux/ZHmwFPzE6hf2Y5LbkRs+hbI=
+modernc.org/memory v1.11.0/go.mod h1:/JP4VbVC+K5sU2wZi9bHoq2MAkCnrt2r98UGeSK7Mjw=
+modernc.org/sqlite v1.53.0 h1:20WG8N9q4ji/dEqGk4uiI0c6OPjSeLTNYGFCc3+7c1M=
+modernc.org/sqlite v1.53.0/go.mod h1:xoEpOIpGrgT48H5iiyt/YXPCZPEzlfmfFwtk8Lklw8s=

gql_uint64.go

@@ -0,0 +1,55 @@
+package dbx
+
+import (
+	"fmt"
+	"io"
+	"strconv"
+)
+
+// Uint64Marshaler wraps a uint64 for GraphQL JSON output as a string scalar.
+type Uint64Marshaler uint64
+
+// MarshalGQL writes the uint64 as a JSON string for gqlgen compatibility.
+func (u Uint64Marshaler) MarshalGQL(w io.Writer) {
+	fmt.Fprintf(w, "\"%d\"", uint64(u))
+}
+
+// MarshalUint64 marshals a uint64 as a JSON string to avoid JavaScript
+// precision loss for integers larger than 2^53-1.
+func MarshalUint64(i uint64) Uint64Marshaler {
+	return Uint64Marshaler(i)
+}
+
+// UnmarshalUint64 unmarshals a uint64 from a JSON string or number.
+func UnmarshalUint64(v any) (uint64, error) {
+	switch value := v.(type) {
+	case string:
+		if value == "" {
+			return 0, nil
+		}
+		n, err := strconv.ParseUint(value, 10, 64)
+		if err != nil {
+			return 0, fmt.Errorf("invalid uint64 string: %w", err)
+		}
+		return n, nil
+	case int:
+		if value < 0 {
+			return 0, fmt.Errorf("invalid negative uint64: %d", value)
+		}
+		return uint64(value), nil
+	case int64:
+		if value < 0 {
+			return 0, fmt.Errorf("invalid negative uint64: %d", value)
+		}
+		return uint64(value), nil
+	case float64:
+		if value < 0 || value != float64(uint64(value)) {
+			return 0, fmt.Errorf("invalid uint64 number: %v", value)
+		}
+		return uint64(value), nil
+	case uint64:
+		return value, nil
+	default:
+		return 0, fmt.Errorf("invalid uint64 type: %T", v)
+	}
+}

gql_uint64_test.go

@@ -0,0 +1,49 @@
+package dbx
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestMarshalUint64(t *testing.T) {
+	var buf bytes.Buffer
+	MarshalUint64(9007199254740993).MarshalGQL(&buf)
+	assert.Equal(t, `"9007199254740993"`, buf.String())
+}
+
+func TestUnmarshalUint64_String(t *testing.T) {
+	n, err := UnmarshalUint64("42")
+	require.NoError(t, err)
+	assert.Equal(t, uint64(42), n)
+}
+
+func TestUnmarshalUint64_Number(t *testing.T) {
+	n, err := UnmarshalUint64(float64(42))
+	require.NoError(t, err)
+	assert.Equal(t, uint64(42), n)
+}
+
+func TestUnmarshalUint64_RoundTripJSON(t *testing.T) {
+	const original uint64 = 9007199254740993
+	var buf bytes.Buffer
+	MarshalUint64(original).MarshalGQL(&buf)
+
+	var wire string
+	require.NoError(t, json.Unmarshal(buf.Bytes(), &wire))
+
+	got, err := UnmarshalUint64(wire)
+	require.NoError(t, err)
+	assert.Equal(t, original, got)
+}
+
+func TestUnmarshalUint64_Invalid(t *testing.T) {
+	_, err := UnmarshalUint64(true)
+	assert.Error(t, err)
+
+	_, err = UnmarshalUint64(float64(-1))
+	assert.Error(t, err)
+}

interfaces.go

@@ -0,0 +1,51 @@
+package dbx
+
+import (
+	"context"
+	"database/sql"
+
+	"github.com/go-jet/jet/v2/qrm"
+)
+
+// Queryable interface is an SQL driver object that can execute SQL statements
+// for Jet.
+type Queryable interface {
+	qrm.Queryable
+	Query(string, ...any) (*sql.Rows, error)
+}
+
+// Executable interface is an SQL driver object that can execute SQL statements
+// for Jet.
+type Executable interface {
+	qrm.Executable
+	Exec(string, ...any) (sql.Result, error)
+}
+
+// ExecutableTx interface is an SQL driver object that implements the Executable
+// interface and can also begin a transaction.
+type ExecutableTx interface {
+	Executable
+	Begin() (*sql.Tx, error)
+}
+
+// QueryExec interface is an SQL driver object that can execute SQL statements for Jet
+// and query results.
+type QueryExec interface {
+	Queryable
+	Executable
+}
+
+// QueryExecTx interface is an SQL driver object that can execute SQL statements for
+// Jet, query results, and begin a transaction.
+type QueryExecTx interface {
+	Queryable
+	ExecutableTx
+}
+
+// Statement is a common Jet statement for all SQL operations.
+type Statement interface {
+	Query(db qrm.Queryable, destination any) error
+	QueryContext(ctx context.Context, db qrm.Queryable, destination any) error
+	Exec(db qrm.Executable) (sql.Result, error)
+	ExecContext(ctx context.Context, db qrm.Executable) (sql.Result, error)
+}

internal/dbxshared/logger.go

@@ -1,5 +1,7 @@
 package dbxshared
 
+import "fmt"
+
 type Logger interface {
 	InitLogger()
 }
@@ -20,11 +22,17 @@ func RegisterLogger(dialect dialectString, logger Logger) {
 }
 
 // InitLogger initializes the logger for a specific dialect.
-func InitLogger(dialect dialectString) {
+func InitLogger(dialect dialectString) error {
 	dialectStr := dialect.String()
 	logger, exists := loggerRegistry[dialectStr]
 	if !exists {
-		panic("No logger registered for dialect: " + dialectStr)
+		return fmt.Errorf("no logger registered for dialect %q: blank-import dbxm (MySQL) or dbxp (Postgres)", dialectStr)
 	}
 	logger.InitLogger()
+	return nil
+}
+
+// ResetLoggerRegistry clears registered loggers. It is intended for tests only.
+func ResetLoggerRegistry() {
+	loggerRegistry = make(map[string]Logger)
 }

internal/dbxshared/logger_test.go

@@ -0,0 +1,32 @@
+package dbxshared
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+type testDialect string
+
+func (d testDialect) String() string { return string(d) }
+
+type stubLogger struct{}
+
+func (stubLogger) InitLogger() {}
+
+func TestInitLogger_UnregisteredDialect(t *testing.T) {
+	ResetLoggerRegistry()
+	t.Cleanup(ResetLoggerRegistry)
+
+	err := InitLogger(testDialect("mysql"))
+	assert.ErrorContains(t, err, "blank-import dbxm")
+}
+
+func TestInitLogger_RegisteredDialect(t *testing.T) {
+	ResetLoggerRegistry()
+	t.Cleanup(ResetLoggerRegistry)
+
+	RegisterLogger(testDialect("mysql"), stubLogger{})
+	err := InitLogger(testDialect("mysql"))
+	assert.NoError(t, err)
+}

jet_columns.go

@@ -0,0 +1,30 @@
+package dbx
+
+import (
+	"slices"
+
+	"github.com/go-jet/jet/v2/mysql"
+)
+
+// ContainsCol reports whether cols contains col.
+func ContainsCol(cols ColumnList, col Column) bool {
+	return slices.Contains(cols, col)
+}
+
+// NormalCols processes a list of columns and strips out any that implement any of
+// ColumnTimestamp, ColumnTime, or ColumnDate.
+func NormalCols(cols ...Column) ColumnList {
+	res := make(ColumnList, 0)
+
+	for _, col := range cols {
+		switch col.(type) {
+		case mysql.ColumnTimestamp,
+			mysql.ColumnTime,
+			mysql.ColumnDate:
+		default:
+			res = append(res, col)
+		}
+	}
+
+	return res
+}

jet_columns_test.go

@@ -0,0 +1,105 @@
+package dbx
+
+import (
+	"context"
+	"database/sql"
+	"errors"
+	"testing"
+
+	"github.com/go-jet/jet/v2/mysql"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	_ "modernc.org/sqlite"
+)
+
+func TestContainsCol(t *testing.T) {
+	colA := mysql.StringColumn("a")
+	colB := mysql.StringColumn("b")
+	cols := ColumnList{colA, colB}
+
+	assert.True(t, ContainsCol(cols, colA))
+	assert.False(t, ContainsCol(cols, mysql.StringColumn("c")))
+}
+
+func TestNormalCols_ExcludesTimestamp(t *testing.T) {
+	name := mysql.StringColumn("name")
+	ts := mysql.TimestampColumn("updated_at")
+	cols := NormalCols(name, ts)
+
+	require.Len(t, cols, 1)
+	assert.Equal(t, name, cols[0])
+}
+
+type mockTxDB struct {
+	beginErr error
+}
+
+func (m *mockTxDB) Query(string, ...any) (*sql.Rows, error) { return nil, nil }
+
+func (m *mockTxDB) QueryContext(context.Context, string, ...any) (*sql.Rows, error) {
+	return nil, nil
+}
+
+func (m *mockTxDB) Exec(string, ...any) (sql.Result, error) { return nil, nil }
+
+func (m *mockTxDB) ExecContext(context.Context, string, ...any) (sql.Result, error) {
+	return nil, nil
+}
+
+func (m *mockTxDB) Begin() (*sql.Tx, error) {
+	if m.beginErr != nil {
+		return nil, m.beginErr
+	}
+	return &sql.Tx{}, nil
+}
+
+func TestWithTx_ReturnsFnError(t *testing.T) {
+	db := openTestDB(t)
+
+	wantErr := errors.New("fn failed")
+	err := WithTx(context.Background(), db, func(_ *sql.Tx) error {
+		return wantErr
+	})
+	assert.ErrorIs(t, err, wantErr)
+}
+
+func TestWithTx_CommitsOnSuccess(t *testing.T) {
+	db := openTestDB(t)
+	called := false
+
+	err := WithTx(context.Background(), db, func(_ *sql.Tx) error {
+		called = true
+		return nil
+	})
+	require.NoError(t, err)
+	assert.True(t, called)
+}
+
+func openTestDB(t *testing.T) *sql.DB {
+	t.Helper()
+	db, err := sql.Open("sqlite", ":memory:")
+	require.NoError(t, err)
+	t.Cleanup(func() { _ = db.Close() })
+	return db
+}
+
+func TestWithTx_CancelledContext(t *testing.T) {
+	ctx, cancel := context.WithCancel(context.Background())
+	cancel()
+
+	err := WithTx(ctx, &mockTxDB{}, func(_ *sql.Tx) error {
+		return nil
+	})
+	assert.ErrorIs(t, err, context.Canceled)
+}
+
+func TestWithTx_BeginError(t *testing.T) {
+	wantErr := errors.New("begin failed")
+	err := WithTx(context.Background(), &mockTxDB{beginErr: wantErr}, func(_ *sql.Tx) error {
+		return nil
+	})
+	assert.ErrorIs(t, err, wantErr)
+}
+
+var _ QueryExecTx = (*mockTxDB)(nil)

jet_expr.go

@@ -0,0 +1,55 @@
+package dbx
+
+import (
+	"fmt"
+
+	"github.com/go-jet/jet/v2/mysql"
+)
+
+// ExprValues converts a list of values to a list of Expression values using
+// function f to transform the values (mysql.String for strings, mysql.Uint64, etc).
+func ExprValues[T any](values []T, f func(T) Expression) []Expression {
+	expressions := make([]Expression, len(values))
+	for i, v := range values {
+		expressions[i] = f(v)
+	}
+	return expressions
+}
+
+// ExprPtrs converts a list of pointers to Expression values, skipping nil
+// entries. Function f receives the dereferenced value.
+func ExprPtrs[T any](values []*T, f func(T) Expression) []Expression {
+	expressions := make([]Expression, 0, len(values))
+	for _, v := range values {
+		if v == nil {
+			continue
+		}
+		expressions = append(expressions, f(*v))
+	}
+	return expressions
+}
+
+// ExprStringers converts a list of fmt.Stringers to a list of Expression values.
+func ExprStringers(values []fmt.Stringer) []Expression {
+	expressions := make([]Expression, len(values))
+	for i, v := range values {
+		expressions[i] = mysql.String(v.String())
+	}
+	return expressions
+}
+
+// StringKSUIDExpr returns a Jet expression for a string-encoded KSUID column.
+func StringKSUIDExpr(id StringKSUID) Expression {
+	if id.IsNil() {
+		return mysql.StringExp(mysql.NULL)
+	}
+	return mysql.String(id.String())
+}
+
+// BinaryKSUIDExpr returns a Jet expression for a binary-encoded KSUID column.
+func BinaryKSUIDExpr(id BinaryKSUID) Expression {
+	if id.IsNil() {
+		return mysql.StringExp(mysql.NULL)
+	}
+	return mysql.String(string(id.Bytes()))
+}

jet_expr_test.go

@@ -0,0 +1,60 @@
+package dbx
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestStringKSUIDExpr(t *testing.T) {
+	id := NewStringKSUID()
+	expr := StringKSUIDExpr(id)
+	require.NotNil(t, expr)
+	assert.Equal(t, expr, id.Expr())
+
+	nilExpr := StringKSUIDExpr(NilStringKSUID)
+	require.NotNil(t, nilExpr)
+	assert.Equal(t, nilExpr, NilStringKSUID.Expr())
+}
+
+func TestBinaryKSUIDExpr(t *testing.T) {
+	id := NewBinaryKSUID()
+	expr := BinaryKSUIDExpr(id)
+	require.NotNil(t, expr)
+	assert.Equal(t, expr, id.Expr())
+
+	nilExpr := BinaryKSUIDExpr(NilBinaryKSUID)
+	require.NotNil(t, nilExpr)
+	assert.Equal(t, nilExpr, NilBinaryKSUID.Expr())
+}
+
+func TestExprPtrs_StringKSUID(t *testing.T) {
+	a := NewStringKSUID()
+	b := NewStringKSUID()
+	exprs := ExprPtrs([]*StringKSUID{&a, nil, &b}, StringKSUIDExpr)
+	require.Len(t, exprs, 2)
+}
+
+func TestExprPtrs_BinaryKSUID(t *testing.T) {
+	a := NewBinaryKSUID()
+	exprs := ExprPtrs([]*BinaryKSUID{&a, nil}, BinaryKSUIDExpr)
+	require.Len(t, exprs, 1)
+	assert.NotNil(t, exprs[0])
+}
+
+func TestExprValues_StringKSUID(t *testing.T) {
+	a := NewStringKSUID()
+	b := NewStringKSUID()
+	exprs := ExprValues([]*StringKSUID{&a, &b}, func(id *StringKSUID) Expression {
+		return id.Expr()
+	})
+	require.Len(t, exprs, 2)
+}
+
+func TestExprValues_BinaryKSUID(t *testing.T) {
+	a := NewBinaryKSUID()
+	exprs := ExprValues([]BinaryKSUID{a}, BinaryKSUIDExpr)
+	require.Len(t, exprs, 1)
+	assert.NotNil(t, exprs[0])
+}

jet_types.go

@@ -0,0 +1,18 @@
+package dbx
+
+import "github.com/go-jet/jet/v2/mysql"
+
+// Column is a dialect-neutral alias for Jet column expressions.
+type Column = mysql.Column
+
+// ColumnList is a dialect-neutral alias for Jet column lists.
+type ColumnList = mysql.ColumnList
+
+// Expression is a dialect-neutral alias for Jet SQL expressions.
+type Expression = mysql.Expression
+
+// BoolExpression is a dialect-neutral alias for Jet boolean expressions.
+type BoolExpression = mysql.BoolExpression
+
+// ReadableTable is a dialect-neutral alias for Jet readable tables.
+type ReadableTable = mysql.ReadableTable

jsonb.go

@@ -15,11 +15,6 @@ func NewJSONB(data map[string]any) JSONB {
 	return JSONB(data)
 }
 
-// ToMap converts the JSONB value to a map[string]any.
-func (j JSONB) ToMap() map[string]any {
-	return map[string]any(j)
-}
-
 // Scan implements the sql.Scanner interface. It supports converting from
 // string, []byte, or nil into a JSONB value. Attempting to convert from
 // any other type will return an error.

jsonb_test.go

@@ -0,0 +1,52 @@
+package dbx
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestJSONB_ScanValue(t *testing.T) {
+	original := JSONB{"key": "value", "num": float64(1)}
+
+	val, err := original.Value()
+	require.NoError(t, err)
+
+	var scanned JSONB
+	require.NoError(t, scanned.Scan(val))
+	assert.Equal(t, original["key"], scanned["key"])
+
+	require.NoError(t, scanned.Scan([]byte(`{"a":1}`)))
+	assert.Equal(t, float64(1), scanned["a"])
+
+	require.NoError(t, scanned.Scan(`{"b":2}`))
+	assert.Equal(t, float64(2), scanned["b"])
+}
+
+func TestJSONB_ScanNil(t *testing.T) {
+	j := JSONB{"x": 1}
+	require.NoError(t, j.Scan(nil))
+	assert.Nil(t, j)
+
+	val, err := JSONB(nil).Value()
+	require.NoError(t, err)
+	assert.Nil(t, val)
+}
+
+func TestJSONB_ScanUnsupportedType(t *testing.T) {
+	var j JSONB
+	err := j.Scan(123)
+	assert.Error(t, err)
+}
+
+func TestNewJSONB(t *testing.T) {
+	data := map[string]any{"k": "v"}
+	j := NewJSONB(data)
+	assert.Equal(t, JSONB(data), j)
+}
+
+func TestJSONB_String(t *testing.T) {
+	j := JSONB{"a": "b"}
+	assert.JSONEq(t, `{"a":"b"}`, j.String())
+}

ksuid_binary.go

@@ -0,0 +1,95 @@
+package dbx
+
+import (
+	"database/sql/driver"
+	"fmt"
+	"io"
+
+	"github.com/segmentio/ksuid"
+)
+
+// BinaryKSUID wraps segmentio/ksuid for binary-column storage (BINARY(20), BYTEA).
+// SQL Scan/Value use the raw 20-byte encoding. GraphQL transit uses a string
+// scalar (base62 KSUID).
+type BinaryKSUID struct {
+	ksuid.KSUID
+}
+
+// NilBinaryKSUID is the zero/nil BinaryKSUID value.
+var NilBinaryKSUID = BinaryKSUID{KSUID: ksuid.Nil}
+
+// Equal reports whether two BinaryKSUID values represent the same identifier,
+// treating two nil values as equal. Implements [ApplyInterface].
+func (b BinaryKSUID) Equal(rh BinaryKSUID) bool {
+	return equalKSUID(b.KSUID, rh.KSUID)
+}
+
+// IsZero reports whether b is nil. Implements [ApplyInterface].
+func (b BinaryKSUID) IsZero() bool {
+	return b.IsNil()
+}
+
+// NewBinaryKSUID generates a new BinaryKSUID.
+func NewBinaryKSUID() BinaryKSUID {
+	return BinaryKSUID{KSUID: ksuid.New()}
+}
+
+// ParseBinaryKSUID parses a BinaryKSUID from its raw 20-byte form.
+func ParseBinaryKSUID(b []byte) (BinaryKSUID, error) {
+	id, err := ksuid.FromBytes(b)
+	if err != nil {
+		return BinaryKSUID{}, err
+	}
+	return BinaryKSUID{KSUID: id}, nil
+}
+
+// AsStringKSUID returns a StringKSUID view of the same identifier.
+func (b BinaryKSUID) AsStringKSUID() StringKSUID {
+	return StringKSUID{KSUID: b.KSUID}
+}
+
+// Expr returns a Jet expression for this BinaryKSUID. See [BinaryKSUIDExpr].
+func (b BinaryKSUID) Expr() Expression {
+	return BinaryKSUIDExpr(b)
+}
+
+// Scan implements sql.Scanner for binary-backed KSUID columns.
+func (b *BinaryKSUID) Scan(src any) error {
+	switch v := src.(type) {
+	case nil:
+		*b = BinaryKSUID{}
+		return nil
+	case []byte:
+		if len(v) == ksuidStringLength {
+			return fmt.Errorf("BinaryKSUID.Scan: string-encoded KSUID (%d bytes); use StringKSUID", len(v))
+		}
+		id, err := ksuid.FromBytes(v)
+		if err != nil {
+			return fmt.Errorf("BinaryKSUID.Scan: %w", err)
+		}
+		*b = BinaryKSUID{KSUID: id}
+		return nil
+	case string:
+		return fmt.Errorf("BinaryKSUID.Scan: string value %q; use StringKSUID or store raw bytes", v)
+	default:
+		return fmt.Errorf("BinaryKSUID.Scan: unable to scan type %T", v)
+	}
+}
+
+// Value implements driver.Valuer for binary-backed KSUID columns.
+func (b BinaryKSUID) Value() (driver.Value, error) {
+	if b.IsNil() {
+		return nil, nil
+	}
+	return b.Bytes(), nil
+}
+
+// UnmarshalGQL implements the graphql.Unmarshaler interface.
+func (b *BinaryKSUID) UnmarshalGQL(value any) error {
+	return unmarshalKSUIDFromGQL(value, b.UnmarshalText)
+}
+
+// MarshalGQL implements the graphql.Marshaler interface.
+func (b BinaryKSUID) MarshalGQL(w io.Writer) {
+	marshalKSUIDToGQL(w, b.KSUID)
+}

ksuid_gql.go

@@ -0,0 +1,37 @@
+package dbx
+
+import (
+	"fmt"
+	"io"
+	"strconv"
+
+	"github.com/segmentio/ksuid"
+)
+
+func unmarshalKSUIDFromGQL(value any, unmarshal func([]byte) error) error {
+	str, ok := value.(string)
+	if !ok {
+		return fmt.Errorf("GraphQL failed to unmarshal KSUID value: %v", value)
+	}
+	return unmarshal([]byte(str))
+}
+
+// marshalKSUIDToGQL writes a JSON-encoded string scalar for gqlgen.
+func marshalKSUIDToGQL(w io.Writer, id ksuid.KSUID) {
+	quoted := strconv.Quote(id.String())
+	if _, err := io.WriteString(w, quoted); err != nil {
+		panic(fmt.Errorf("GraphQL failed to write KSUID value: %w", err))
+	}
+}
+
+const (
+	ksuidBinaryLength = 20
+	ksuidStringLength = 27
+)
+
+func equalKSUID(lh, rh ksuid.KSUID) bool {
+	if lh.IsNil() && rh.IsNil() {
+		return true
+	}
+	return lh.String() == rh.String()
+}

ksuid_parse.go

@@ -0,0 +1,69 @@
+package dbx
+
+import (
+	"encoding/hex"
+	"fmt"
+
+	"github.com/segmentio/ksuid"
+)
+
+// ParseStringKSUIDAny parses a StringKSUID from a string, byte slice, ksuid.KSUID,
+// or nil. Accepts base62 string (27 bytes), raw binary (20 bytes), or hex-encoded
+// forms (40 or 54 bytes).
+func ParseStringKSUIDAny(src any) (StringKSUID, error) {
+	id, err := parseKSUIDAny(src)
+	if err != nil {
+		return NilStringKSUID, err
+	}
+	return StringKSUID{KSUID: id}, nil
+}
+
+// ParseBinaryKSUIDAny parses a BinaryKSUID from the same accepted forms as
+// [ParseStringKSUIDAny].
+func ParseBinaryKSUIDAny(src any) (BinaryKSUID, error) {
+	id, err := parseKSUIDAny(src)
+	if err != nil {
+		return NilBinaryKSUID, err
+	}
+	return BinaryKSUID{KSUID: id}, nil
+}
+
+func parseKSUIDAny(src any) (ksuid.KSUID, error) {
+	switch v := src.(type) {
+	case ksuid.KSUID:
+		return v, nil
+	case StringKSUID:
+		return v.KSUID, nil
+	case BinaryKSUID:
+		return v.KSUID, nil
+	case string:
+		return parseKSUIDBytes([]byte(v))
+	case []byte:
+		return parseKSUIDBytes(v)
+	case nil:
+		return ksuid.Nil, nil
+	default:
+		return ksuid.Nil, fmt.Errorf("cannot parse KSUID from type %T", src)
+	}
+}
+
+func parseKSUIDBytes(src []byte) (ksuid.KSUID, error) {
+	if len(src) == 40 || len(src) == 54 {
+		decoded := make([]byte, hex.DecodedLen(len(src)))
+		if _, err := hex.Decode(decoded, src); err != nil {
+			return ksuid.Nil, err
+		}
+		src = decoded
+	}
+
+	switch len(src) {
+	case 0:
+		return ksuid.Nil, nil
+	case ksuidBinaryLength:
+		return ksuid.FromBytes(src)
+	case ksuidStringLength:
+		return ksuid.Parse(string(src))
+	default:
+		return ksuid.Nil, fmt.Errorf("cannot parse KSUID from byte slice of length %d", len(src))
+	}
+}

ksuid_parse_test.go

@@ -0,0 +1,54 @@
+package dbx
+
+import (
+	"encoding/hex"
+	"testing"
+
+	"github.com/segmentio/ksuid"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestParseStringKSUIDAny(t *testing.T) {
+	id := ksuid.New()
+	stringForm := id.String()
+	byteForm := id.Bytes()
+	hexForm := hex.EncodeToString(byteForm)
+
+	cases := []struct {
+		name string
+		src  any
+	}{
+		{"string", stringForm},
+		{"bytes string form", []byte(stringForm)},
+		{"bytes binary form", byteForm},
+		{"hex", []byte(hexForm)},
+		{"ksuid", id},
+		{"StringKSUID", StringKSUID{KSUID: id}},
+		{"nil", nil},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			got, err := ParseStringKSUIDAny(tc.src)
+			require.NoError(t, err)
+			if tc.src == nil {
+				assert.True(t, got.IsZero())
+				return
+			}
+			assert.Equal(t, id.String(), got.String())
+		})
+	}
+}
+
+func TestParseBinaryKSUIDAny(t *testing.T) {
+	id := ksuid.New()
+	got, err := ParseBinaryKSUIDAny(id.Bytes())
+	require.NoError(t, err)
+	assert.Equal(t, id.Bytes(), got.Bytes())
+}
+
+func TestParseStringKSUIDAny_InvalidType(t *testing.T) {
+	_, err := ParseStringKSUIDAny(123)
+	assert.Error(t, err)
+}

ksuid_string.go

@@ -0,0 +1,100 @@
+package dbx
+
+import (
+	"database/sql/driver"
+	"fmt"
+	"io"
+
+	"github.com/segmentio/ksuid"
+)
+
+// StringKSUID wraps segmentio/ksuid for text-column storage (VARCHAR, TEXT).
+// SQL Scan/Value use the base62 string encoding. GraphQL transit uses a string
+// scalar (base62 KSUID).
+type StringKSUID struct {
+	ksuid.KSUID
+}
+
+// NilStringKSUID is the zero/nil StringKSUID value.
+var NilStringKSUID = StringKSUID{KSUID: ksuid.Nil}
+
+// Equal reports whether two StringKSUID values represent the same identifier,
+// treating two nil values as equal. Implements [ApplyInterface].
+func (s StringKSUID) Equal(rh StringKSUID) bool {
+	return equalKSUID(s.KSUID, rh.KSUID)
+}
+
+// IsZero reports whether s is nil. Implements [ApplyInterface].
+func (s StringKSUID) IsZero() bool {
+	return s.IsNil()
+}
+
+// NewStringKSUID generates a new StringKSUID.
+func NewStringKSUID() StringKSUID {
+	return StringKSUID{KSUID: ksuid.New()}
+}
+
+// ParseStringKSUID parses a StringKSUID from its base62 string form.
+func ParseStringKSUID(s string) (StringKSUID, error) {
+	id, err := ksuid.Parse(s)
+	if err != nil {
+		return StringKSUID{}, err
+	}
+	return StringKSUID{KSUID: id}, nil
+}
+
+// AsBinaryKSUID returns a BinaryKSUID view of the same identifier.
+func (s StringKSUID) AsBinaryKSUID() BinaryKSUID {
+	return BinaryKSUID{KSUID: s.KSUID}
+}
+
+// Expr returns a Jet expression for this StringKSUID. See [StringKSUIDExpr].
+func (s StringKSUID) Expr() Expression {
+	return StringKSUIDExpr(s)
+}
+
+// Scan implements sql.Scanner for string-backed KSUID columns.
+func (s *StringKSUID) Scan(src any) error {
+	switch v := src.(type) {
+	case nil:
+		*s = StringKSUID{}
+		return nil
+	case string:
+		id, err := ksuid.Parse(v)
+		if err != nil {
+			return fmt.Errorf("StringKSUID.Scan: %w", err)
+		}
+		*s = StringKSUID{KSUID: id}
+		return nil
+	case []byte:
+		if len(v) == ksuidBinaryLength {
+			return fmt.Errorf("StringKSUID.Scan: binary KSUID payload (%d bytes); use BinaryKSUID", len(v))
+		}
+		id, err := ksuid.Parse(string(v))
+		if err != nil {
+			return fmt.Errorf("StringKSUID.Scan: %w", err)
+		}
+		*s = StringKSUID{KSUID: id}
+		return nil
+	default:
+		return fmt.Errorf("StringKSUID.Scan: unable to scan type %T", v)
+	}
+}
+
+// Value implements driver.Valuer for string-backed KSUID columns.
+func (s StringKSUID) Value() (driver.Value, error) {
+	if s.IsNil() {
+		return nil, nil
+	}
+	return s.String(), nil
+}
+
+// UnmarshalGQL implements the graphql.Unmarshaler interface.
+func (s *StringKSUID) UnmarshalGQL(value any) error {
+	return unmarshalKSUIDFromGQL(value, s.UnmarshalText)
+}
+
+// MarshalGQL implements the graphql.Marshaler interface.
+func (s StringKSUID) MarshalGQL(w io.Writer) {
+	marshalKSUIDToGQL(w, s.KSUID)
+}

ksuid_test.go

@@ -0,0 +1,167 @@
+package dbx
+
+import (
+	"bytes"
+	"encoding/json"
+	"io"
+	"testing"
+
+	"github.com/go-jet/jet/v2/mysql"
+	"github.com/segmentio/ksuid"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestStringKSUID_ScanValue(t *testing.T) {
+	id := NewStringKSUID()
+	require.False(t, id.IsNil())
+
+	val, err := id.Value()
+	require.NoError(t, err)
+	assert.Equal(t, id.String(), val)
+
+	var scanned StringKSUID
+	require.NoError(t, scanned.Scan(id.String()))
+	assert.Equal(t, id, scanned)
+
+	require.NoError(t, scanned.Scan([]byte(id.String())))
+	assert.Equal(t, id, scanned)
+
+	var nilKSUID StringKSUID
+	val, err = nilKSUID.Value()
+	require.NoError(t, err)
+	assert.Nil(t, val)
+
+	require.NoError(t, scanned.Scan(nil))
+	assert.True(t, scanned.IsNil())
+}
+
+func TestStringKSUID_ScanRejectsBinary(t *testing.T) {
+	var s StringKSUID
+	err := s.Scan(idBytes(t))
+	assert.ErrorContains(t, err, "BinaryKSUID")
+}
+
+func TestStringKSUID_Conversion(t *testing.T) {
+	s := NewStringKSUID()
+	b := s.AsBinaryKSUID()
+	assert.Equal(t, s.String(), b.String())
+	assert.Equal(t, s.Bytes(), b.Bytes())
+	assert.Equal(t, s, b.AsStringKSUID())
+}
+
+func TestStringKSUID_GQL(t *testing.T) {
+	id := NewStringKSUID()
+	wire := assertKSUIDGQLMarshal(t, id)
+
+	var parsed StringKSUID
+	require.NoError(t, parsed.UnmarshalGQL(wire))
+	assert.Equal(t, id, parsed)
+}
+
+func TestBinaryKSUID_GQL(t *testing.T) {
+	id := NewBinaryKSUID()
+	wire := assertKSUIDGQLMarshal(t, id)
+
+	var parsed BinaryKSUID
+	require.NoError(t, parsed.UnmarshalGQL(wire))
+	assert.Equal(t, id, parsed)
+}
+
+func assertKSUIDGQLMarshal(t *testing.T, id interface{ String() string; MarshalGQL(w io.Writer) }) string {
+	t.Helper()
+
+	var buf bytes.Buffer
+	id.MarshalGQL(&buf)
+
+	var wire string
+	require.NoError(t, json.Unmarshal(buf.Bytes(), &wire))
+	assert.Equal(t, id.String(), wire)
+	return wire
+}
+
+func TestBinaryKSUID_ScanValue(t *testing.T) {
+	id := NewBinaryKSUID()
+	require.False(t, id.IsNil())
+
+	val, err := id.Value()
+	require.NoError(t, err)
+	assert.Equal(t, id.Bytes(), val)
+
+	var scanned BinaryKSUID
+	require.NoError(t, scanned.Scan(id.Bytes()))
+	assert.Equal(t, id, scanned)
+
+	var nilKSUID BinaryKSUID
+	val, err = nilKSUID.Value()
+	require.NoError(t, err)
+	assert.Nil(t, val)
+
+	require.NoError(t, scanned.Scan(nil))
+	assert.True(t, scanned.IsNil())
+}
+
+func TestBinaryKSUID_ScanRejectsStringEncoding(t *testing.T) {
+	s := NewStringKSUID()
+	var b BinaryKSUID
+	err := b.Scan([]byte(s.String()))
+	assert.ErrorContains(t, err, "StringKSUID")
+
+	err = b.Scan(s.String())
+	assert.ErrorContains(t, err, "StringKSUID")
+}
+
+func TestBinaryKSUID_Conversion(t *testing.T) {
+	b := NewBinaryKSUID()
+	s := b.AsStringKSUID()
+	assert.Equal(t, b.String(), s.String())
+	assert.Equal(t, b, s.AsBinaryKSUID())
+}
+
+
+func TestStringKSUID_EqualIsZero(t *testing.T) {
+	id := NewStringKSUID()
+	assert.True(t, NilStringKSUID.Equal(NilStringKSUID))
+	assert.True(t, id.Equal(id))
+	assert.False(t, id.Equal(NilStringKSUID))
+	assert.True(t, NilStringKSUID.IsZero())
+	assert.False(t, id.IsZero())
+}
+
+func TestBinaryKSUID_EqualIsZero(t *testing.T) {
+	id := NewBinaryKSUID()
+	assert.True(t, NilBinaryKSUID.Equal(NilBinaryKSUID))
+	assert.True(t, id.Equal(id))
+	assert.False(t, id.Equal(NilBinaryKSUID))
+	assert.True(t, NilBinaryKSUID.IsZero())
+	assert.False(t, id.IsZero())
+}
+
+func TestStringKSUID_ApplyInterfacePtr(t *testing.T) {
+	targetCol := mysql.StringColumn("id")
+	modified := make(ColumnList, 0)
+	current := Ptr(NewStringKSUID())
+	updated := ApplyInterfacePtr(current, Ptr(NewStringKSUID()), &modified, targetCol)
+	require.NotNil(t, updated)
+	assert.Len(t, modified, 1)
+	assert.False(t, current.Equal(*updated))
+}
+
+func TestParseStringKSUID(t *testing.T) {
+	id := ksuid.New()
+	parsed, err := ParseStringKSUID(id.String())
+	require.NoError(t, err)
+	assert.Equal(t, id.String(), parsed.String())
+}
+
+func TestParseBinaryKSUID(t *testing.T) {
+	id := ksuid.New()
+	parsed, err := ParseBinaryKSUID(id.Bytes())
+	require.NoError(t, err)
+	assert.Equal(t, id.Bytes(), parsed.Bytes())
+}
+
+func idBytes(t *testing.T) []byte {
+	t.Helper()
+	return ksuid.New().Bytes()
+}

module.go

@@ -0,0 +1,146 @@
+package dbx
+
+import (
+	"database/sql"
+	"errors"
+
+	"gitea.auvem.com/go-toolkit/app"
+	"gitea.auvem.com/go-toolkit/dbx/internal/dbxshared"
+	"github.com/go-jet/jet/v2/qrm"
+)
+
+const (
+	// ModuleDBName is the name of the database module.
+	ModuleDBName = "database"
+
+	// DialectPostgres is the PostgreSQL dialect.
+	DialectPostgres Dialect = "postgres"
+	// DialectMySQL is the MySQL dialect.
+	DialectMySQL Dialect = "mysql"
+)
+
+// Dialect is the SQL dialect used by the database connection.
+type Dialect string
+
+// String implements the Stringer interface for Dialect.
+func (d Dialect) String() string {
+	return string(d)
+}
+
+// dbState stores package-level state for the database connection.
+type dbState struct {
+	sqlDB    *sql.DB
+	config   *DBConfig
+	dialect  Dialect
+	debugLog bool
+}
+
+var (
+	// ErrNoRows is returned when a query returns no rows.
+	ErrNoRows = qrm.ErrNoRows
+
+	// ErrValueIsZero is returned when an expected value is missing.
+	ErrValueIsZero = errors.New("value is zero-value for type")
+
+	state = dbState{}
+)
+
+// CurrentDialect returns the SQL dialect configured by [ModuleDB].
+func CurrentDialect() Dialect {
+	return state.dialect
+}
+
+// SQLO returns the current SQL database handle.
+func SQLO() *sql.DB {
+	dbxshared.DBModule.RequireLoaded("dbx.SQLO requires database module")
+	if state.sqlDB == nil {
+		panic("SQL database not initialized")
+	}
+	return state.sqlDB
+}
+
+// ModuleDB returns the database module with the provided configuration.
+// dialect specifies the SQL dialect to use (e.g., DialectPostgres, DialectMySQL).
+// config specifies the database connection configuration.
+// forceDebugLog forces debug logging to be enabled regardless of the config setting.
+func ModuleDB(dialect Dialect, config *DBConfig, forceDebugLog bool) *app.Module {
+	if dbxshared.DBModule != nil {
+		panic("ModuleDB initialized multiple times")
+	}
+	if config == nil {
+		panic("ModuleDB requires a non-nil DBConfig")
+	}
+
+	state.config = config
+	state.dialect = dialect
+	state.debugLog = config.DebugLog || forceDebugLog
+
+	dbxshared.DBModule = app.NewModule(ModuleDBName, app.ModuleOpts{
+		Setup:    setupDB,
+		Teardown: teardownDB,
+	})
+
+	return dbxshared.DBModule
+}
+
+func setupDB(m *app.Module) error {
+	if state.sqlDB != nil && state.sqlDB.Ping() == nil {
+		m.Logger().Warn("Database connection already established")
+		return nil
+	}
+
+	logArgs := []any{
+		"user", state.config.User,
+		"name", state.config.Name,
+		"uri", state.config.URI,
+		"dialect", state.dialect,
+	}
+
+	var err error
+	state.sqlDB, err = sql.Open(string(state.dialect), state.config.ConnectionString(state.dialect))
+	if err != nil {
+		logArgs = append(logArgs, "err", err)
+		m.Logger().Error("Couldn't open SQL database", logArgs...)
+		return err
+	}
+
+	if err := state.sqlDB.Ping(); err != nil {
+		logArgs = append(logArgs, "err", err)
+		m.Logger().Error("Couldn't ping SQL database", logArgs...)
+		return err
+	}
+
+	state.sqlDB.SetMaxOpenConns(state.config.MaxConn)
+
+	stats := state.sqlDB.Stats()
+	m.Logger().Info(
+		"Connected to SQL database",
+		"user", state.config.User,
+		"name", state.config.Name,
+		"uri", state.config.URI,
+		"maxConnections", stats.MaxOpenConnections,
+		"currConnections", stats.OpenConnections,
+	)
+
+	if state.debugLog {
+		if err := dbxshared.InitLogger(state.dialect); err != nil {
+			m.Logger().Error("Couldn't initialize Jet query debug logger", "err", err)
+			return err
+		}
+	}
+
+	return nil
+}
+
+func teardownDB(m *app.Module) error {
+	if state.sqlDB == nil {
+		return nil
+	}
+
+	if err := state.sqlDB.Close(); err != nil {
+		m.Logger().Error("Couldn't close database", "err", err)
+		return err
+	}
+	m.Logger().Info("Closed database connection")
+	return nil
+}

module_test.go

@@ -0,0 +1,45 @@
+package dbx
+
+import (
+	"testing"
+
+	"gitea.auvem.com/go-toolkit/dbx/internal/dbxshared"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestDestName_MissingFieldWithoutModule(t *testing.T) {
+	type Foo struct {
+		Bar int
+	}
+
+	name := DestName(Foo{}, "Missing")
+	assert.Empty(t, name)
+}
+
+func TestDestName_ValidPath(t *testing.T) {
+	type Inner struct {
+		Value string
+	}
+	type Foo struct {
+		Inner Inner
+	}
+
+	name := DestName(Foo{}, "Inner", "Value")
+	assert.Equal(t, "Foo.Inner.Value", name)
+}
+
+func TestDialect_AfterModuleDB(t *testing.T) {
+	if dbxshared.DBModule != nil {
+		t.Skip("database module already initialized")
+	}
+
+	_ = ModuleDB(DialectPostgres, &DBConfig{
+		User:     "user",
+		Password: "pass",
+		URI:      "localhost:5432",
+		Name:     "test",
+		MaxConn:  1,
+	}, false)
+
+	assert.Equal(t, DialectPostgres, CurrentDialect())
+}

ptr.go

@@ -0,0 +1,65 @@
+package dbx
+
+import (
+	"reflect"
+	"strings"
+	"time"
+)
+
+// NowPtr returns a pointer to the current time.
+func NowPtr() *time.Time {
+	now := time.Now()
+	return &now
+}
+
+// Ptr returns a pointer to the given value of any scalar type. Returns nil if the value is a zero value.
+func Ptr[T any](val T) *T {
+	if reflect.ValueOf(val).IsZero() {
+		return nil
+	}
+	return &val
+}
+
+// Val returns the value of the pointer to a scalar type, or the zero value if the pointer is nil.
+func Val[T any](ptr *T) T {
+	if ptr == nil {
+		var zero T
+		return zero
+	}
+	return *ptr
+}
+
+// TrimPtr trims the whitespace from a pointer to a string and returns nil only if the pointer is nil.
+func TrimPtr(s *string) *string {
+	if s == nil {
+		return nil
+	}
+	trimmed := strings.TrimSpace(*s)
+	return &trimmed
+}
+
+// TrimPtrToNil trims the whitespace from a pointer to a string and returns nil
+// if the resulting string is empty or if the pointer is nil.
+func TrimPtrToNil(s *string) *string {
+	if s == nil {
+		return nil
+	}
+	trimmed := strings.TrimSpace(*s)
+	if trimmed == "" {
+		return nil
+	}
+	return &trimmed
+}
+
+// IsZero checks if a pointer references the zero value of a given type and
+// returns an error if this condition is met, otherwise returns nil if the
+// pointer is nil or the value is not zero.
+func IsZero[T any](ptr *T) error {
+	if ptr == nil {
+		return nil
+	}
+	if reflect.ValueOf(*ptr).IsZero() {
+		return ErrValueIsZero
+	}
+	return nil
+}

ptr_test.go

@@ -0,0 +1,26 @@
+package dbx
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestPtr_Val(t *testing.T) {
+	assert.Nil(t, Ptr(""))
+	assert.Equal(t, Ptr("hi"), Ptr("hi"))
+	assert.Equal(t, "", Val((*string)(nil)))
+	assert.Equal(t, "hi", Val(Ptr("hi")))
+}
+
+func TestStringToFilter(t *testing.T) {
+	assert.Equal(t, "%hello%world%", StringToFilter("hello world"))
+	assert.Equal(t, "%test%", StringToFilter("%test%"))
+}
+
+func TestTrimPtr(t *testing.T) {
+	s := "  hello  "
+	assert.Equal(t, "hello", *TrimPtr(&s))
+	assert.Nil(t, TrimPtr(nil))
+	assert.Nil(t, TrimPtrToNil(Ptr("   ")))
+}

query.go

@@ -0,0 +1,100 @@
+package dbx
+
+import (
+	"context"
+	"errors"
+)
+
+// Fetch queries the database and returns the result as a slice. If the query
+// returns no rows, it returns an empty slice and no error.
+func Fetch[T any](sqlo Queryable, stmt Statement) ([]*T, error) {
+	return FetchContext[T](context.Background(), sqlo, stmt)
+}
+
+// FetchContext is the context-aware variant of [Fetch].
+func FetchContext[T any](ctx context.Context, sqlo Queryable, stmt Statement) ([]*T, error) {
+	var result []*T
+	if err := stmt.QueryContext(ctx, sqlo, &result); err != nil && !errors.Is(err, ErrNoRows) {
+		return nil, err
+	}
+	return result, nil
+}
+
+// MustFetch queries the database and returns the result as a slice. If the query
+// returns no rows, it returns an empty slice and the desired error.
+func MustFetch[T any](sqlo Queryable, stmt Statement, notFoundErr error) ([]*T, error) {
+	return MustFetchContext[T](context.Background(), sqlo, stmt, notFoundErr)
+}
+
+// MustFetchContext is the context-aware variant of [MustFetch].
+func MustFetchContext[T any](ctx context.Context, sqlo Queryable, stmt Statement, notFoundErr error) ([]*T, error) {
+	result, err := FetchContext[T](ctx, sqlo, stmt)
+	if err != nil {
+		return nil, err
+	}
+	if len(result) == 0 {
+		return nil, notFoundErr
+	}
+	return result, nil
+}
+
+// FetchOne queries the database and returns a single result. If the query
+// returns no rows, it returns nil and no error.
+func FetchOne[T any](sqlo Queryable, stmt Statement) (*T, error) {
+	return FetchOneContext[T](context.Background(), sqlo, stmt)
+}
+
+// FetchOneContext is the context-aware variant of [FetchOne].
+func FetchOneContext[T any](ctx context.Context, sqlo Queryable, stmt Statement) (*T, error) {
+	result, err := FetchContext[T](ctx, sqlo, stmt)
+	if err != nil {
+		return nil, err
+	}
+	if len(result) == 0 {
+		return nil, nil
+	}
+	return result[0], nil
+}
+
+// MustFetchOne queries the database and returns a single result. If the query
+// returns no rows, it returns nil and the desired error.
+func MustFetchOne[T any](sqlo Queryable, stmt Statement, notFoundErr error) (*T, error) {
+	return MustFetchOneContext[T](context.Background(), sqlo, stmt, notFoundErr)
+}
+
+// MustFetchOneContext is the context-aware variant of [MustFetchOne].
+func MustFetchOneContext[T any](ctx context.Context, sqlo Queryable, stmt Statement, notFoundErr error) (*T, error) {
+	result, err := MustFetchContext[T](ctx, sqlo, stmt, notFoundErr)
+	if err != nil {
+		return nil, err
+	}
+	return result[0], nil
+}
+
+// Query executes a Jet statement and scans the result into dest.
+func Query(sqlo Queryable, stmt Statement, dest any) error {
+	return QueryContext(context.Background(), sqlo, stmt, dest)
+}
+
+// QueryContext is the context-aware variant of [Query].
+func QueryContext(ctx context.Context, sqlo Queryable, stmt Statement, dest any) error {
+	return stmt.QueryContext(ctx, sqlo, dest)
+}
+
+// MustQuery executes a Jet statement and scans the result into dest. If the
+// query returns no rows, notFoundErr is returned instead of [ErrNoRows].
+func MustQuery(sqlo Queryable, stmt Statement, dest any, notFoundErr error) error {
+	return MustQueryContext(context.Background(), sqlo, stmt, dest, notFoundErr)
+}
+
+// MustQueryContext is the context-aware variant of [MustQuery].
+func MustQueryContext(ctx context.Context, sqlo Queryable, stmt Statement, dest any, notFoundErr error) error {
+	err := stmt.QueryContext(ctx, sqlo, dest)
+	if err != nil {
+		if errors.Is(err, ErrNoRows) {
+			return notFoundErr
+		}
+		return err
+	}
+	return nil
+}

query_test.go

@@ -0,0 +1,135 @@
+package dbx
+
+import (
+	"context"
+	"errors"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestFetch_EmptyOnNoRows(t *testing.T) {
+	stmt := mockStatement{
+		queryContextFn: func(_ context.Context, dest any) error {
+			return ErrNoRows
+		},
+	}
+
+	result, err := Fetch[row](mockQueryable{}, stmt)
+	require.NoError(t, err)
+	assert.Empty(t, result)
+}
+
+func TestFetch_ReturnsRows(t *testing.T) {
+	stmt := mockStatement{
+		queryContextFn: func(_ context.Context, dest any) error {
+			ptr := dest.(*[]*row)
+			*ptr = []*row{{ID: 1}, {ID: 2}}
+			return nil
+		},
+	}
+
+	result, err := Fetch[row](mockQueryable{}, stmt)
+	require.NoError(t, err)
+	assert.Len(t, result, 2)
+}
+
+func TestMustFetch_NotFound(t *testing.T) {
+	errNotFound := errors.New("not found")
+	stmt := mockStatement{
+		queryContextFn: func(_ context.Context, _ any) error {
+			return ErrNoRows
+		},
+	}
+
+	result, err := MustFetch[row](mockQueryable{}, stmt, errNotFound)
+	assert.Nil(t, result)
+	assert.ErrorIs(t, err, errNotFound)
+}
+
+func TestFetchContext_PropagatesContext(t *testing.T) {
+	ctx := context.WithValue(context.Background(), testContextKey{}, "ok")
+	var gotCtx context.Context
+	stmt := mockStatement{
+		queryContextFn: func(c context.Context, dest any) error {
+			gotCtx = c
+			ptr := dest.(*[]*row)
+			*ptr = []*row{{ID: 3}}
+			return nil
+		},
+	}
+
+	_, err := FetchContext[row](ctx, mockQueryable{}, stmt)
+	require.NoError(t, err)
+	assert.Equal(t, ctx, gotCtx)
+}
+
+type testContextKey struct{}
+
+func TestFetchOne_NilWhenEmpty(t *testing.T) {
+	stmt := mockStatement{
+		queryContextFn: func(_ context.Context, _ any) error {
+			return ErrNoRows
+		},
+	}
+
+	result, err := FetchOne[row](mockQueryable{}, stmt)
+	require.NoError(t, err)
+	assert.Nil(t, result)
+}
+
+func TestMustFetchOne_NotFound(t *testing.T) {
+	errNotFound := errors.New("not found")
+	stmt := mockStatement{
+		queryContextFn: func(_ context.Context, _ any) error {
+			return ErrNoRows
+		},
+	}
+
+	result, err := MustFetchOne[row](mockQueryable{}, stmt, errNotFound)
+	assert.Nil(t, result)
+	assert.ErrorIs(t, err, errNotFound)
+}
+
+func TestQuery_ScansDest(t *testing.T) {
+	stmt := mockStatement{
+		queryContextFn: func(_ context.Context, dest any) error {
+			ptr := dest.(*row)
+			ptr.ID = 5
+			return nil
+		},
+	}
+
+	var result row
+	err := Query(mockQueryable{}, stmt, &result)
+	require.NoError(t, err)
+	assert.Equal(t, 5, result.ID)
+}
+
+func TestMustQuery_NotFound(t *testing.T) {
+	errNotFound := errors.New("not found")
+	stmt := mockStatement{
+		queryContextFn: func(_ context.Context, _ any) error {
+			return ErrNoRows
+		},
+	}
+
+	var result row
+	err := MustQuery(mockQueryable{}, stmt, &result, errNotFound)
+	assert.ErrorIs(t, err, errNotFound)
+}
+
+func TestMustQueryContext_PropagatesContext(t *testing.T) {
+	ctx := context.WithValue(context.Background(), testContextKey{}, "ok")
+	var gotCtx context.Context
+	stmt := mockStatement{
+		queryContextFn: func(c context.Context, dest any) error {
+			gotCtx = c
+			return ErrNoRows
+		},
+	}
+
+	_ = MustQueryContext(ctx, mockQueryable{}, stmt, &row{}, errors.New("nf"))
+	assert.Equal(t, ctx, gotCtx)
+}

testhelpers_test.go

@@ -0,0 +1,72 @@
+package dbx
+
+import (
+	"context"
+	"database/sql"
+
+	"github.com/go-jet/jet/v2/qrm"
+)
+
+type mockStatement struct {
+	queryContextFn func(ctx context.Context, dest any) error
+	execContextFn  func(ctx context.Context) (sql.Result, error)
+}
+
+func (m mockStatement) Query(db qrm.Queryable, dest any) error {
+	return m.QueryContext(context.Background(), db, dest)
+}
+
+func (m mockStatement) QueryContext(ctx context.Context, db qrm.Queryable, dest any) error {
+	if m.queryContextFn != nil {
+		return m.queryContextFn(ctx, dest)
+	}
+	return nil
+}
+
+func (m mockStatement) Exec(db qrm.Executable) (sql.Result, error) {
+	return m.ExecContext(context.Background(), db)
+}
+
+func (m mockStatement) ExecContext(ctx context.Context, db qrm.Executable) (sql.Result, error) {
+	if m.execContextFn != nil {
+		return m.execContextFn(ctx)
+	}
+	return nil, nil
+}
+
+type mockQueryable struct{}
+
+func (mockQueryable) Query(string, ...any) (*sql.Rows, error) { return nil, nil }
+
+func (mockQueryable) QueryContext(context.Context, string, ...any) (*sql.Rows, error) {
+	return nil, nil
+}
+
+type mockExecutable struct{}
+
+func (mockExecutable) Exec(string, ...any) (sql.Result, error) { return nil, nil }
+
+func (mockExecutable) ExecContext(context.Context, string, ...any) (sql.Result, error) {
+	return nil, nil
+}
+
+type mockResult struct {
+	lastInsertID      int64
+	rowsAffected      int64
+	lastInsertErr     error
+	rowsAffectedErr   error
+}
+
+func (r mockResult) LastInsertId() (int64, error) {
+	return r.lastInsertID, r.lastInsertErr
+}
+
+func (r mockResult) RowsAffected() (int64, error) {
+	return r.rowsAffected, r.rowsAffectedErr
+}
+
+type row struct {
+	ID int
+}
+
+var _ Statement = mockStatement{}

tx.go

@@ -0,0 +1,53 @@
+package dbx
+
+import (
+	"context"
+	"database/sql"
+)
+
+// WithTx begins a transaction on db, runs fn, and commits on success.
+// The transaction is rolled back if fn returns an error or commit fails.
+func WithTx(ctx context.Context, db QueryExecTx, fn func(tx *sql.Tx) error) error {
+	if err := ctx.Err(); err != nil {
+		return err
+	}
+
+	tx, err := db.Begin()
+	if err != nil {
+		return err
+	}
+
+	if err := fn(tx); err != nil {
+		_ = tx.Rollback()
+		return err
+	}
+
+	return tx.Commit()
+}
+
+// WithTxValue begins a transaction on db, runs fn, and commits on success.
+// Returns the value from fn or zero and an error if begin, fn, or commit fails.
+// The transaction is rolled back if fn returns an error.
+func WithTxValue[T any](ctx context.Context, db QueryExecTx, fn func(tx QueryExec) (T, error)) (T, error) {
+	var zero T
+	if err := ctx.Err(); err != nil {
+		return zero, err
+	}
+
+	tx, err := db.Begin()
+	if err != nil {
+		return zero, err
+	}
+
+	result, err := fn(tx)
+	if err != nil {
+		_ = tx.Rollback()
+		return zero, err
+	}
+
+	if err := tx.Commit(); err != nil {
+		return zero, err
+	}
+
+	return result, nil
+}

tx_test.go

@@ -0,0 +1,40 @@
+package dbx
+
+import (
+	"context"
+	"errors"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestWithTxValue_ReturnsResult(t *testing.T) {
+	db := openTestDB(t)
+
+	result, err := WithTxValue(context.Background(), db, func(tx QueryExec) (int, error) {
+		return 42, nil
+	})
+	require.NoError(t, err)
+	assert.Equal(t, 42, result)
+}
+
+func TestWithTxValue_RollbackOnError(t *testing.T) {
+	db := openTestDB(t)
+	fail := errors.New("fail")
+
+	_, err := WithTxValue(context.Background(), db, func(tx QueryExec) (int, error) {
+		return 0, fail
+	})
+	assert.ErrorIs(t, err, fail)
+}
+
+func TestWithTxValue_CancelledContext(t *testing.T) {
+	ctx, cancel := context.WithCancel(context.Background())
+	cancel()
+
+	_, err := WithTxValue(ctx, openTestDB(t), func(tx QueryExec) (int, error) {
+		return 1, nil
+	})
+	assert.ErrorIs(t, err, context.Canceled)
+}

utility.go

@@ -1,277 +0,0 @@
-package dbx
-
-import (
-	"fmt"
-	"reflect"
-	"strings"
-	"time"
-
-	"gitea.auvem.com/go-toolkit/dbx/internal/dbxshared"
-	"github.com/go-jet/jet/v2/mysql"
-	"github.com/go-jet/jet/v2/postgres"
-	"golang.org/x/exp/constraints"
-)
-
-// Column is a union type for mysql.Column and postgres.Column
-type Column interface {
-	mysql.Column
-	postgres.Column
-}
-
-// ColumnList is a union type for mysql.ColumnList and postgres.ColumnList
-type ColumnList interface {
-	mysql.ColumnList
-	postgres.ColumnList
-}
-
-// BoolExpression is a union type for mysql.BoolExpression and postgres.BoolExpression
-type BoolExpression interface {
-	mysql.BoolExpression
-	postgres.BoolExpression
-}
-
-// StringToFilter processes a string to be used as a filter in an SQL LIKE
-// statement. It replaces all spaces with % and adds % to the beginning and
-// end of the string.
-func StringToFilter(str string) string {
-	// Remove any existing leading or trailing % characters
-	str = strings.Trim(str, "%")
-
-	// Replace all spaces with % and add % to the beginning and end of the string
-	str = strings.ReplaceAll(str, " ", "%")
-	str = "%" + str + "%"
-
-	return str
-}
-
-// DestName returns the name of the type passed as `destTypeStruct` as a string,
-// normalized for compatibility with the Jet QRM.
-func DestName(destTypeStruct any, path ...string) string {
-	v := reflect.ValueOf(destTypeStruct)
-	for v.Kind() == reflect.Pointer {
-		v = v.Elem()
-	}
-
-	destIdent := v.Type().String()
-	destIdent = destIdent[strings.LastIndex(destIdent, ".")+1:]
-
-	for i, p := range path {
-		if v.Kind() != reflect.Struct {
-			dbxshared.DBModule.Logger().Error("DestName: path parent is not a struct", "path", destIdent+"."+strings.Join(path[:i+1], "."))
-			return ""
-		}
-
-		v = v.FieldByName(p)
-
-		if !v.IsValid() {
-			dbxshared.DBModule.Logger().Error("DestName: field does not exist", "path", destIdent+"."+strings.Join(path[:i+1], "."))
-			return ""
-		}
-
-		destIdent += "." + p
-	}
-
-	return destIdent
-}
-
-// NormalCols processes a list of columns and strips out any that implement any of
-// ColumnTimestamp, ColumnTime, or ColumnDate.
-func NormalCols[CL ColumnList](cols ...Column) CL {
-	res := make(CL, 0)
-
-	for _, col := range cols {
-		switch col.(type) {
-		case mysql.ColumnTimestamp, // = postgres.ColumnTimestamp
-			mysql.ColumnTime, // = postgres.ColumnTime
-			mysql.ColumnDate: // = postgres.ColumnDate
-			// skip time/date/timestamp columns
-		default:
-			res = append(res, col)
-		}
-	}
-
-	return res
-}
-
-// ExprValues converts a list of values to a list of mysql.Expression values using
-// function f to transform the values (mysql.String for strings, mysql.Uint64, etc).
-func ExprValues[T any](values []T, f func(T) mysql.Expression) []mysql.Expression {
-	expressions := make([]mysql.Expression, len(values))
-	for i, v := range values {
-		expressions[i] = f(v)
-	}
-	return expressions
-}
-
-// ExprStringers converts a list of fmt.Stringers to a list of mysql.Expression values.
-func ExprStringers(values []fmt.Stringer) []mysql.Expression {
-	expressions := make([]mysql.Expression, len(values))
-	for i, v := range values {
-		expressions[i] = mysql.String(v.String())
-	}
-	return expressions
-}
-
-// NowPtr returns a pointer to the current time.
-func NowPtr() *time.Time {
-	now := time.Now()
-	return &now
-}
-
-// Ptr returns a pointer to the given value of any scalar type. Returns nil if the value is a zero value.
-func Ptr[T any](val T) *T {
-	if reflect.ValueOf(val).IsZero() {
-		return nil
-	}
-	return &val
-}
-
-// Val returns the value of the pointer to a scalar type, or the zero value if the pointer is nil.
-func Val[T any](ptr *T) T {
-	if ptr == nil {
-		var zero T
-		return zero
-	}
-	return *ptr
-}
-
-// TrimPtr trims the whitespace from a pointer to a string and returns nil only if the pointer is nil.
-func TrimPtr(s *string) *string {
-	if s == nil {
-		return nil
-	}
-	trimmed := strings.TrimSpace(*s)
-	return &trimmed
-}
-
-// TrimPtrToNil trims the whitespace from a pointer to a string and returns nil
-// if the resulting string is empty or if the pointer is nil.
-func TrimPtrToNil(s *string) *string {
-	if s == nil {
-		return nil
-	}
-	trimmed := strings.TrimSpace(*s)
-	if trimmed == "" {
-		return nil
-	}
-	return &trimmed
-}
-
-// IsZero checks if a pointer references the zero value of a given type and
-// returns an error if this condition is met, otherwise returns nil if the
-// pointer is nil or the value is not zero.
-func IsZero[T any](ptr *T) error {
-	if ptr == nil {
-		return nil
-	}
-	if reflect.ValueOf(*ptr).IsZero() {
-		return ErrValueIsZero
-	}
-	return nil
-}
-
-// ApplyPtr compares the existing value with a new value and returns the updated value if they differ.
-// If the new value is nil, the existing value is retained. If the new value is a zero-value, the
-// existing value is NOT retained, it will be set to nil. If the value is changed, targetColumn is pushed
-// to updatedColumns.
-func ApplyPtr[T constraints.Float | constraints.Integer | string | bool](
-	existing *T,
-	newVal *T,
-	updatedColumns *mysql.ColumnList,
-	targetColumn mysql.Column,
-) *T {
-	if newVal == nil {
-		return existing
-	}
-	if reflect.ValueOf(*newVal).IsZero() {
-		newVal = nil
-	}
-	if newVal == nil && existing == nil || newVal != nil && existing != nil && *existing == *newVal {
-		return existing
-	}
-	*updatedColumns = append(*updatedColumns, targetColumn)
-	return newVal
-}
-
-// ApplyComplexPtr compares the existing value with a new value and returns the updated value if they differ.
-// The new value may be of a different type (e.g. existing is uint16 and new is uint64), but it will be
-// converted to match the current type resulting in potential loss of data. If the new value is nil, the
-// existing value is retained. If the new value is a zero-value, the existing value is NOT retained, it
-// will be set to nil. If the value is changed, targetColumn is pushed to updatedColumns.
-func ApplyComplexPtr[
-	Existing constraints.Float | constraints.Integer,
-	New constraints.Float | constraints.Integer,
-](
-	existing *Existing,
-	newVal *New,
-	updatedColumns *mysql.ColumnList,
-	targetColumn mysql.Column,
-) *Existing {
-	if newVal == nil {
-		return existing
-	}
-	cast := Existing(*newVal) // Convert new value to existing type
-	if existing != nil && *existing == cast {
-		return existing
-	}
-	if reflect.ValueOf(cast).IsZero() {
-		if existing != nil {
-			*updatedColumns = append(*updatedColumns, targetColumn)
-		}
-		return nil
-	} else {
-		*updatedColumns = append(*updatedColumns, targetColumn)
-		return &cast
-	}
-}
-
-type ApplyInterface[T any] interface {
-	Equal(T) bool
-	IsZero() bool
-}
-
-// ApplyInterfacePtr compares the existing value with a new value and returns the updated value if
-// they differ. Comparable types must have IsZero and Equal methods. If the new value is nil, the
-// existing value is retained. If the new value is a zero-value, the existing value is NOT retained,
-// it will be set to nil. If the value is changed, targetColumn is pushed to updatedColumns.
-func ApplyInterfacePtr[T ApplyInterface[T]](
-	existing *T,
-	newVal *T,
-	updatedColumns *mysql.ColumnList,
-	targetColumn mysql.Column,
-) *T {
-	if newVal == nil {
-		return existing
-	}
-	if existing != nil && (*existing).Equal(*newVal) {
-		return existing
-	}
-	if (*newVal).IsZero() {
-		if existing != nil {
-			*updatedColumns = append(*updatedColumns, targetColumn)
-		}
-		return nil
-	} else {
-		*updatedColumns = append(*updatedColumns, targetColumn)
-		return newVal
-	}
-}
-
-// ApplyVal compares the existing value with a pointer to a new value and returns the updated value if they
-// differ. If the new value is nil, the existing value is retained. If the value is changed, targetColumn
-// is pushed to updatedColumns
-func ApplyVal[T constraints.Float | constraints.Integer | string | bool](
-	existing T,
-	newVal *T,
-	updatedColumns *mysql.ColumnList,
-	targetColumn mysql.Column,
-) T {
-	if newVal == nil {
-		return existing
-	}
-	if existing == *newVal {
-		return existing
-	}
-	*updatedColumns = append(*updatedColumns, targetColumn)
-	return *newVal
-}

uuid.go

@@ -1,64 +0,0 @@
-package dbx
-
-import (
-	"encoding/json"
-	"fmt"
-	"io"
-	"log/slog"
-
-	"github.com/segmentio/ksuid"
-)
-
-// UUID is a wrapper around ksuid.KSUID that implements the
-// graphql.Unmarshaler and graphql.Marshaler interfaces for use in GraphQL APIs.
-// It also provides additional convenience functions such as ParseUUID and NewUUID.
-type UUID struct {
-	ksuid.KSUID
-}
-
-type uuidTransport struct {
-	UUIDStr string `json:"uuid_str"`
-}
-
-// Generates a new, wrapped KSUID. In the strange case that random bytes can't be read, it will panic.
-func NewUUID() UUID {
-	return UUID{KSUID: ksuid.New()}
-}
-
-// ParseUUID parses a UUID from a string. If the string is not a valid UUID, it will return an error.
-func ParseUUID(s string) (UUID, error) {
-	ksuid, err := ksuid.Parse(s)
-	if err != nil {
-		return UUID{}, err
-	}
-	return UUID{KSUID: ksuid}, nil
-}
-
-// UnmarshalGQL implements the graphql.Unmarshaler interface
-func (u *UUID) UnmarshalGQL(value interface{}) error {
-	slog.Debug("uuid unmarshaling from gql", "val", value)
-	str, ok := value.(string)
-	if !ok {
-		return fmt.Errorf("GraphQL failed to unmarshal UUID value: %v", value)
-	}
-
-	if err := u.UnmarshalText([]byte(str)); err != nil {
-		return err
-	}
-
-	return nil
-}
-
-// MarshalGQL implements the graphql.Marshaler interface
-func (u UUID) MarshalGQL(w io.Writer) {
-	transport := uuidTransport{UUIDStr: u.String()}
-	json, err := json.Marshal(transport)
-	if err != nil {
-		panic(fmt.Errorf("GraphQL failed to JSON-marshal UUID value: %s", err))
-	}
-	slog.Debug("uuid marshaling to gql", "uuid", u.String(), "json", string(json))
-	_, err = w.Write(json)
-	if err != nil {
-		panic(fmt.Errorf("GraphQL failed to write UUID value: %s", string(json)))
-	}
-}