Django:NotImplementedError:annotate() + different(fields) není implementováno

Zkuste toto:

Question.objects.annotate(
    answer_amount=Count('answers'),
    is_user_agreed=F('answers__is_agreed'),
).order_by('id', '-answers__is_agreed').distinct('id')

Pokud question nemá žádné answers a poté question.is_user_agreed je None . Pokud question má alespoň jednu answer s answer.is_agreed=True a poté question.is_agreed je True . V opačném případě is_user_agreed je False .

Nebo toto:

agreed_questons = Answer.objects.filter(
    is_agreed=True,
).values_list('question_id', flat=True).distinct()

Question.objects.annotate(
    answer_amount=Count('answers'),
    is_agreed=Case(
        When(id__in=agreed_questions, then=True),
        When(answers__isnull=True, then=None),
        default=False,
        output_field=NullBooleanField(),
    ),
)

agreed_questons je seznam id z questions , které mají alespoň jednu answer s answer.is_agreed=True .