Hi.
This is probably trivial, but I've not managed to find the solution.
How do I filter objects based on the count of a ManyToManyField?
My example:
I have two classes -- Blog and Submission:
class Blog( models.Model ):
entries = models.ManyToManyField( Submission )
class Submission( models.Model ):
[... whatever ]
I want to fetch a list of all Blog instances which have at least one
Submission , i.e. entries.count() > 0. Changing the model is not an
option.
I've been trying all kinds of permutations of filter, entries, count,
gt, etc, such as:
Blog.objects.filter(entries__count__gt = 0)
No luck so far.
Can somebody please help me?
Thanks,
Daniel
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