On Aug 14, 8:57 pm, DrakerNet2 <[EMAIL PROTECTED]> wrote:
> How do I obtain thedifferencebetweenQueryset1 and 2 (i.e. how do I
> obtain all records fromQueryset1 that do not appear inQueryset2?
I've been trying to work this out as well. I have an answer, but not
one that I'm very happy with.
To retrieve a list of all the books *not* in a library I can write:
>>> books = Book.objects.exclude(pk__in=library.books.values('pk').query)
It seems a shame to have to specify the primary key here and I don't
like poking around inside the implementation to get at the query
attribute. I was hoping for something a little cleaner like:
>>> books = Book.objects.all() - library.books.all()
Am I missing something?
Thanks
Ben
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