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QRM returns qrm.ErrNoRows when scanning into struct destination and query result set is empty.

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go-jet 2019-10-18 10:15:08 +02:00
parent 0b00a6b12c
commit 15acb1c326
3 changed files with 9 additions and 7 deletions
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9
qrm/qrm.go
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@ -2,15 +2,18 @@ package qrm
import (
"context"
"database/sql"
"errors"
"github.com/go-jet/jet/internal/utils"
"reflect"
)
// ErrNoRows is returned by Query when query result set is empty
var ErrNoRows = errors.New("qrm: no rows in result set")
// Query executes Query Result Mapping (QRM) of `query` with list of parametrized arguments `arg` over database connection `db`
// using context `ctx` into destination `destPtr`.
// Destination can be either pointer to struct or pointer to slice of structs.
// If destination is pointer to struct and query result set is empty, method returns sql.ErrNoRows.
// If destination is pointer to struct and query result set is empty, method returns qrm.ErrNoRows.
func Query(ctx context.Context, db DB, query string, args []interface{}, destPtr interface{}) error {
utils.MustBeInitializedPtr(db, "jet: db is nil")
@ -33,7 +36,7 @@ func Query(ctx context.Context, db DB, query string, args []interface{}, destPtr
}
if rowsProcessed == 0 {
return sql.ErrNoRows
return ErrNoRows
}
// edge case when row result set contains only NULLs.