feat: add features

backend/pkg/db/db.go

@@ -0,0 +1,17 @@
+package db
+
+import (
+	"context"
+	"database/sql"
+
+	"backend/common/consts"
+
+	"github.com/go-jet/jet/v2/qrm"
+)
+
+func FromContext(ctx context.Context, db *sql.DB) qrm.DB {
+	if tx, ok := ctx.Value(consts.CtxKeyTx).(*sql.Tx); ok {
+		return tx
+	}
+	return db
+}