Use for a repo action one database transaction (#19576)

... more context

(part of #9307)

models/db/context.go

@@ -103,7 +103,14 @@ func WithContext(f func(ctx *Context) error) error {
 }
 
 // WithTx represents executing database operations on a transaction
-func WithTx(f func(ctx context.Context) error) error {
+// you can optionally change the context to a parrent one
+func WithTx(f func(ctx context.Context) error, stdCtx ...context.Context) error {
+	parentCtx := DefaultContext
+	if len(stdCtx) != 0 && stdCtx[0] != nil {
+		// TODO: make sure parent context has no open session
+		parentCtx = stdCtx[0]
+	}
+
 	sess := x.NewSession()
 	defer sess.Close()
 	if err := sess.Begin(); err != nil {
@@ -111,7 +118,7 @@ func WithTx(f func(ctx context.Context) error) error {
 	}
 
 	if err := f(&Context{
-		Context: DefaultContext,
+		Context: parentCtx,
 		e:       sess,
 	}); err != nil {
 		return err