On Apr 15, 2008, at 10:32 PM, Dave Harrison wrote:
>
> Hey all,
>
> The below code establishes 3 tables (house, dog, owner) and a
> mapper table to associate owners and dogs (friendships).
>
> When I use either MySQL (5.0.51) or SQLite (3.4.2) as the backend,
> this code works correctly. However when I use Postgres (either 8.2.7
> or 8.3.1) I get the following integrity error:
>
> sqlalchemy.exceptions.IntegrityError: (IntegrityError) update or
> delete on table "dog" violates foreign key constraint
> "friendship_dog_id_fkey" on table "friendship" DETAIL: Key (id)=(1)
> is still referenced from table "friendship". 'DELETE FROM dog WHERE
> dog.id = %(id)s' [{'id': 1}, {'id': 2}]
always use "delete" cascade in conjunction with "delete-orphan". It
doesnt make much sense to have delete-orphan only and not "delete"
cascade. If that doesn't solve your problem here, let me know and Ill
try running the example script.
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