serializers.py 文件源码

def validate_membership(self, attrs, source):
        all_modified = attrs.get('membership')

        all_existing = Member.objects.filter(
            user=self.object, status=MemberStatusField.STATUS_MEMBER
        )
        all_existing = list(all_existing)
        all_modified = list(all_modified)
        for exi in all_existing:
            found = False
            for mod in all_modified:
                if exi.id == mod.id:
                    found = True
                if mod.status != MemberStatusField.STATUS_MEMBER:
                    msg = 'Only members with STATUS_MEMBER could be updated'
                    raise serializers.ValidationError(msg)
            if not found:
                msg = 'All memberships keys has to be changed at once'
                raise serializers.ValidationError(msg)

        return attrs