Sent too soon!
def calculate_score(self):
return
x.m2m_set.filter(condition).aggregate(avg=Avg('m2m_subfield__score'))['avg']
returns the "Relation fields do not support nested lookups" error
On Fri, Apr 8, 2016 at 11:27 AM, Jonty Needham <jontyneed...@gmail.com>
wrote:
> I'm not sure what this error means or how to resolve it. I'm guessing it's
> because in my model I'm trying to assign a field to the value of the
> average of all the many2many's from another field. But I can do this at the
> command line happily, yet when I put it on a submethod I can't do it, so I
> don't understand what's going wrong.
>
> This works:
>
> x.field_name =
> x.m2m_set.filter(condition).aggregate(avg=Avg('m2m_subfield__score'))['avg']
> x.save()
>
> Yes including the method on the model for x as follows:
>
> def calculate_score(self):
>
>
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