[Django]-Django – query filter on manytomany is empty

Adding to @Bernhard answer, other possible solution can be achieved using the Q() object.

from django.db.models import Q

filters = Q(manytomany=None)

TestModel.objects.filter(filters)

Negation:

filters = ~Q(manytomany=None)

TestModel.objects.filter(filters)

Even though the topic has already an answer this could be of help. Try with lookups:

empty = TestModel.objects.filter(manytomany__isnull = True)
#........If you want to get their counter part
not_empty = TestModel.objects.filter(manytomany__isnull = False)

Basically, you get two query sets: one where your manytomany fields are empty, and the other with objects that have data in the manytomanyfield.

Hope this could be of some help!

this is an old question but I needed it and the provided answers didn’t work for me, but I did fix it and got the proper filtering (on Django 2.2) this is how:

testModel.objects.filter(testmodel__anothermodel=None)

as you can see using the model name all lower case then two underscores then the many to many model name that did it for me