Comment 7 for bug 959294

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Adam Gandelman (gandelman-a) wrote : Re: Can't delete users

This is a bug, and is not surfacing in devstack testing because devstack hasn't yet moved to precise. Oneiric MySQL is configured with MyISAM storage engine by default, which means FK constraints are non-existent in the backend and are essentially meaningless. MySQL on Precise uses InnoDB as the default, and FK constraints described in the models exist and are enforced. Using Precise or configuring an Oneiric devstack MySQL install to use InnoDB by default (prior to syncing the database) will reproduce this issue.