Outer transaction prevents Model.afterSaveCommit from firing

[jeremyharris]

The outer transaction created by DbTest prevents the event from firing because Model.afterSaveCommit only fires if it is not currently in a transaction.

A possible solution to this would be to not use Connection::begin & friends to handle the transaction in the FixtureInjector. Those methods track the transaction state internally. Instead it might work if you start the transaction outside of those methods:

ConnectionManager::get('test')->begin();
// becomes
ConnectionManager::get('test')->getDriver()->beginTransaction();

This way the internal state of Connection isn't aware of the outer transaction. This should cause Model.afterSaveCommit to fire again.