使用simplepro，部分模块报错，请教急！！

File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/django/contrib/admin/templatetags/admin_list.py", line 425, in search_form 'show_result_count': cl.result_count != cl.full_result_count, AttributeError: 'ArticleAdmin' object has no attribute 'result_count'