#1007: [patch] Add support for a faux ON DELETE RESTRICT functionality
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Reporter: bitprophet | Owner: adrian
Status: new | Component: Database wrapper
Version: | Resolution:
Keywords: | Stage: Accepted
Has_patch: 1 | Needs_docs: 1
Needs_tests: 1 | Needs_better_patch: 1
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Comment (by Jeff Forcier <[EMAIL PROTECTED]>):
Re: recently attached patch: since things appeared to be re-jiggered a
fair amount in the move from 0.91 to 0.95 (in the deletion mechanisms,
that is) I had to re-examine my old patch and redo it. The end result
should be exactly the same, but it gets there in a more efficient manner
now - it just does an check during the iteration in
{{{_collect_sub_objects()}}} to see if the current related object is set
to follow or not, and triggers the 'RESTRICT'-like behavior if so.
No mucking with sets or calling {{{get_related_many_to_many_objects()}}}
prematurely seems to be necessary--or rather, I realized that it was okay
to delete items if they have M2M relationships, since those don't appear
to trigger the CASCADE-like behavior evidenced with more direct
relationships like FKs. Don't remember if that was different back in 0.91.
I just noticed I neglected to add the extra Exception subclass, so I will
overwrite the new diff with that included. Since I have no test-fu I will
also try and take a whack at that in the near future - learning is good.
--
Ticket URL: <http://code.djangoproject.com/ticket/1007#comment:14>
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