Django 3 what filter should be used to get everything where id_parent_id field is not NULL?

Question

Django

comments = ArticleComment.objects.order_by('-id').filter(id_article_id = news.id, id_parent_id = None) # result 5 тут все которые NULL
comments_r = ArticleComment.objects.filter(id_article_id = news.id, id_parent_id = not None) # resul 0 - но должно быть 2 ######## почему не работает ???

Answer 1

id_parent_id__isnull=False