go-toolkit/dbx
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remove FetchOne helpers

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Doesn't work due to LIMIT return type--always specific to the postgres
and mysql jet packages.
This commit is contained in:
Elijah Duffy
2025-06-12 18:03:09 -07:00
parent d5c7926e97
commit 88755830e5
1 changed files with 2 additions and 31 deletions
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33
dbx.go
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@@ -60,12 +60,6 @@ type Statement interface {
ExecContext(ctx context.Context, db qrm.Executable) (sql.Result, error)
}
// SelectStatement is a Jet statement that can be executed to fetch rows from the database.
type SelectStatement interface {
Statement
LIMIT(limit int64) SelectStatement
}
var (
// ErrNoRows is returned when a query returns no rows.
ErrNoRows = qrm.ErrNoRows
@@ -114,7 +108,7 @@ func ModuleDB(dialect Dialect, cfg *DBConfig, forceDebugLog bool) *app.Module {
// 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 SelectStatement) ([]*T, 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
@@ -124,7 +118,7 @@ func Fetch[T any](sqlo Queryable, stmt SelectStatement) ([]*T, error) {
// 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 SelectStatement, notFoundErr error) ([]*T, 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
@@ -135,29 +129,6 @@ func MustFetch[T any](sqlo Queryable, stmt SelectStatement, notFoundErr error) (
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 SelectStatement) (*T, error) {
result, err := Fetch[T](sqlo, stmt.LIMIT(1))
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 SelectStatement, notFoundErr error) (*T, error) {
result, err := MustFetch[T](sqlo, stmt.LIMIT(1), 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) {