Django:NotImplementedError:annotate() + distinct(fields) er ikke implementeret

Prøv dette:

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

Hvis question har ingen answers , derefter question.is_user_agreed er None . Hvis question har mindst ét ​​answers med answer.is_agreed=True , derefter question.is_agreed er True . Ellers is_user_agreed er False .

Eller denne:

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 er en liste over id af question , der har mindst ét ​​answers med answer.is_agreed=True .