Am 07.06.2013, 01:13 Uhr, schrieb Andy <[email protected]>:
I may be misunderstanding the question, but the reason that having a
favorite is optional is because I'm using mysql and mysql doesn't
supported deferred constraints.
Oh, I feel your pain! But you are using an engine that at leasts pretends
to support foreign key constraints. If not, book yourself in at the next
asylum!
So if favorite were "NOT NULL", then there would be
no way to create the thing.
Which is why it should be a relation all of its own. I've a sneaking
suspicion that I'm being incredibly dense and missing something obvious.
Charlie
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