Signalling Support

Connect to the following signals to get notified before and after changes are committed to the database. These changes are only tracked if SQLALCHEMY_TRACK_MODIFICATIONS is enabled in the config.

New in version 0.10.

Changed in version 2.1: before_models_committed is triggered correctly.

Deprecated since version 2.1: This will be disabled by default in a future version.

models_committed

This signal is sent when changed models were committed to the database.

The sender is the application that emitted the changes. The receiver is passed the changes parameter with a list of tuples in the form (model instance, operation).

The operation is one of 'insert', 'update', and 'delete'.

before_models_committed

This signal works exactly like models_committed but is emitted before the commit takes place.