Rollback Transaction

The Rollback Transaction block cancels the DB Transaction it runs inside. Every change made in the transaction so far is undone, and the transaction continues on its Failure handle.

Use it when your own logic decides the work must not be saved — a stock check fails, a balance would go negative — without throwing an error or writing raw JS.

Inputs

• Message (optional): a reason handed to the transaction's failure path as message. Supports js: expressions, e.g. js:return 'order total ' + input.total + ' is over the limit';. Defaults to transaction rolled back.

Outputs

None. The block stops the executor chain. Handle what comes next on the transaction's Failure handle, which receives:

{ "reason": "rollback", "message": "<your message>" }

If the transaction has nothing connected to Failure, the run just ends.

Where it can go

Only inside a transaction's Executor chain, at any depth (after an If, inside a loop, ...).

• On the canvas, a rollback that can be reached outside a transaction shows a warning.
• At run time, a rollback outside a transaction fails the run with rollback block ran outside a database transaction.