Vincent Driessen 86233bcdf5 Added initial implementation of cascading document deletion.
The current implementation is still very basic and needs some polish.
The essence of it is that each Document gets a new meta attribute called
"delete_rules" that is a dictionary containing (documentclass,
fieldname) as key and the actual delete rule as a value.  (Possible
values are DO_NOTHING, NULLIFY, CASCADE and DENY.  Of those, only
CASCADE is currently implented.)
2010-12-05 22:24:27 -08:00
..
2010-12-05 22:24:27 -08:00