admin.py 文件源码

def get_queryset(self, request):
        qs = super(CommentAdmin, self).get_queryset(request)
        if django.VERSION >= (1, 8):
            # Concat is not available in 1.7 and 1.6
            qs = qs.annotate(author_sort=Concat('author_type', 'author_id', output_field=TextField()))
            qs = qs.annotate(page_sort=Concat('page_type', 'page_id', output_field=TextField()))
        return qs