[hook] Connection doesn't have "warn"
How to reproduce: create a hook and add a
commit() in a precommit event.
It will trigger this part of code:
@_open_only def commit(self): """commit the current session's transaction""" assert self.cnxset is not None cstate = self.commit_state if cstate == 'uncommitable': raise QueryError('transaction must be rolled back') if cstate == 'precommit': self.warn('calling commit in precommit makes no sense; ignoring commit') return
self.warn is not defined ... so it'll raise an exception.
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