62 class IntegrityHook(hook.Hook):

    62 class IntegrityHook(hook.Hook):

    63     __abstract__ = True

    63     __abstract__ = True

    64     category = 'integrity'

    64     category = 'integrity'

    65 

    65 

    66 class UserIntegrityHook(IntegrityHook):

    66 class UserIntegrityHook(IntegrityHook):

    67     __select__ = IntegrityHook.__select__ & ~hook.regular_session()

    68     __select__ = IntegrityHook.__select__ & ~hook.regular_session()

    68 

    69 

    69 

    70 

    70 class CheckCardinalityHook(UserIntegrityHook):

    71 class CheckCardinalityHook(UserIntegrityHook):

    71     """check cardinalities are satisfied"""

    72     """check cardinalities are satisfied"""