 | happstack-helpers-0.51: Convenience functions for Happstack. | Source code | Contents | Index |
| Happstack.Data.IxSet.Helpers |
| deleteWhere :: (Typeable k, Indexable a b, Ord a, Data a) => k -> IxSet a -> IxSet a |
| deleteWhere :: (Typeable k, Indexable a b, Ord a, Data a) => k -> IxSet a -> IxSet a | Source |
Sort of like a foreign key constraint, if macid were a normal rdbms.
Eg, say you have a table called RepoUsers. When a user (or repo) is deleted , all the RepoUsers that match it should also be deleted