51 lines
1.2 KiB
Go
51 lines
1.2 KiB
Go
package pgUtils
|
|
|
|
import (
|
|
"context"
|
|
"github.com/jackc/pgx/v5"
|
|
"github.com/jackc/pgx/v5/pgxpool"
|
|
"github.com/matchsystems/werr"
|
|
)
|
|
|
|
type PgxQuerier interface {
|
|
Query(ctx context.Context, sql string, args ...any) (pgx.Rows, error)
|
|
}
|
|
|
|
// Query executes query on a provided querier and tries to parse db response
|
|
// Works only with structs
|
|
//
|
|
// Usage:
|
|
//
|
|
// type User struct {
|
|
// Id int `db:"id"`
|
|
// Name string `db:"name"`
|
|
// }
|
|
//
|
|
// db := pgx.Connect(context.Background(), "<url>")
|
|
// users, err := pgUtils.Query[User](context.Background(), db, "SELECT id, name FROM users")
|
|
func Query[T any](ctx context.Context, db PgxQuerier, query string, args ...any) (out []T, err error) {
|
|
rows, err := db.Query(ctx, query, args)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
entities, err := pgx.CollectRows(rows, pgx.RowToStructByNameLax[T])
|
|
if err != nil {
|
|
return nil, werr.Wrapf(err, "failed to parse query results")
|
|
}
|
|
return entities, nil
|
|
}
|
|
|
|
// Tx creates new transaction. Cancels it if returned not nil err
|
|
func Tx(ctx context.Context, db *pgxpool.Pool, exec func(ctx context.Context, tx pgx.Tx) error) error {
|
|
tx, err := db.Begin(ctx)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
err = exec(ctx, tx)
|
|
if err != nil {
|
|
_ = tx.Rollback(ctx)
|
|
return err
|
|
}
|
|
return tx.Commit(ctx)
|
|
}
|