Question

I have a model X, containing a ManyToManyField Y, I’m trying to concatenate the results of a querySet of X‘s into a list of all the entries in Y

I know the “easy” way would be:

for x in X:
    for y in x.Y.all():
        list.append(y)

The reasoning to this is related to my previous question:
If x in <listOfModels.field> syntax

Thanks in advance,

Answer 1

Turn the query around. You’re interested in Ys, so you should query Ys.

y_list = Y.objects.filter(x__in=X)