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Python 2021-11-09 14:15:12
Use in in django while preserving order
pk_list = [5, 7, 1, 3, 4] clauses = ' '.join(['WHEN id=%s THEN %s' % (pk, i) for i, pk in enumerate(pk_list)]) ordering = 'CASE %s END' % clauses queryset = Article.objects.filter(pk__in=pk_list).extra( select={'ordering': ordering}, order_by=(... Add solution -
Python 2021-11-05 20:09:21
how do i check if a django queryset is empty
queryset = demo.objects.filter(name="non_existent_name") if queryset.exists(): serializer = DemoSerializer(queryset, many=True) return Response(serializer.data) else: return Response(status=status.HTTP_404_NOT_FOUND) Add solution -
Python 2021-11-02 13:18:08
django many to many post update method via rest
class GroupMembershipSerializer(ModelSerializer): class Meta: model = Membership fields = ('person',) class GroupCreateSerializer(ModelSerializer): memberships = GroupMembershipSerializer(many=True, required=False) def creat... Add solution -
Python 2021-10-27 18:39:03
django filter values with OR operator
Blog.objects.filter(pk__in=[1, 4, 7]) Add solution