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Comment by JonnieCache | Hacker News Reader

OUCH.

Doesn't django let you check if models are valid without saving them?

In rails I can do:

    Family.all.select {|f| !f.valid?}

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Django's ORM does (obj.full_clean()), but he's not using Django's ORM, he's using mongoengine, I have no idea if it does.

mongoengine does do validation. It can be disabled on a per-model basis though.

Django offers a validate function that does exactly that. Unfortunately, the email uniqueness constraint is handled in our save function, due to some backend complexity. So it wouldn't have helped here. Plus, it was a typo that caused the problem, not the function :)

I'm struggling to think of what kind of backend complexity would make it infeasible to check email uniqueness in validation.

Care to elaborate?

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