464 

   464 

   465   class my_relation(RelationDefinition):

   465   class my_relation(RelationDefinition):

   466     __permissions__ = {'read': ('managers', 'users'),

   466     __permissions__ = {'read': ('managers', 'users'),

   467                        'add': ('managers', RRQLExpression('U has_update_permission S')),

   467                        'add': ('managers', RRQLExpression('U has_update_permission S')),

   468                        'delete': ('managers', RRQLExpression('U has_update_permission S'))

   468                        'delete': ('managers', RRQLExpression('U has_update_permission S'))

   470 

   470 

   471 In the above example, user will be allowed to add/delete `my_relation` if he has

   471 In the above example, user will be allowed to add/delete `my_relation` if he has

   472 the `update` permission on the subject of the relation.

   472 the `update` permission on the subject of the relation.

   473 

   473 

   474 .. note::

   474 .. note::