admin.py 文件源码

def queryset(self, request, queryset):
        if self.value():
            try:
                node = queryset.model._default_manager.get(pk=self.value())
            except (TypeError, ValueError, queryset.model.DoesNotExist):
                raise IncorrectLookupParameters()
            return queryset.extra(
                where=[
                    '%s = ANY(%s)' % (
                        node.pk,
                        queryset.model._cte_node_path,
                    ),
                ],
            )
        return queryset