我使用markdownx时会出现错误
如果我用 markdownxfield()
然后我就不能在admin中编辑模型了 . 错误是这样的：
TypeError at /admin/blogsite/articles/add/
'set'对象不可逆
Request Method: GET
Request URL: http://127.0.0.1:8000/admin/blogsite/articles/add/
Django Version: 2.0
Exception Type: TypeError
Exception Value:
'set'对象不可逆
Exception Location: C:\Users\liano\Desktop\python\blog\blog_venv\lib\site-packages\django\forms\widgets.py in merge, line 114
Python Executable: C:\Users\liano\Desktop\python\blog\blog_venv\Scripts\python.exe
Python Version: 3.6.2
那为什么会发生以及如何解决呢？回溯：环境：请求方法：GETRequest URL：http://127.0.0.1:8000/admin/blogsite/articles/add/Django版本：2.0Python版本：3.6.2安装的应用程序：['django.contrib.admin'，'django.contrib.auth'，'django.contrib.contenttypes'，'django.contrib.sessions'，'django.contrib.messages'，'django.contrib.staticfiles'，'blogsite'，'bootstrap3'，'markdownx'，'testapp']已安装的中间件：['django.middleware.security.SecurityMiddleware'， 'django.contrib.sessions.middleware.SessionMiddleware'，'django.middleware.common.CommonMiddleware'，'django.middleware.csrf.CsrfViewMiddleware'，'django.contrib.auth.middleware.AuthenticationMiddleware'，'django.contrib.messages.middleware.MessageMiddleware'，'django.middleware.clickjacking.XFrameOptionsMiddleware']回溯：文件"C:\Users\liano\Desktop\python\blog\blog_venv\lib\site-packages\django\core\handlers\exception.py"在内部35. response = get_response（请求）文件"C:\Users\liano\Desktop\python\blog\blog_venv\lib\site-packages\django\core\handlers\base.py"在_get_response 128. response = self.process_exception_by_middleware（e，request）文件"C:\Users\liano\Desktop\python\blog\blog_venv\lib\site-packages\django\core\handlers\base.py" in _get_response 126. response = wrapped_callback（request，* callback_args，** callback_kwargs）文件"C:\Users\liano\Desktop\python\blog\blog_venv\lib\site-packages\django\contrib\admin\options.py"在包装器574中 . 返回self.admin_site.admin_view（查看）（* args，** kwargs）_wrapped_view文件"C:\Users\liano\Desktop\python\blog\blog_venv\lib\site-packages\django\utils\decorators.py" 142. response = view_func（request，* args，* * kwargs）文件"C:\Users\liano\Desktop\python\blog\blog_venv\lib\site-packages\django\views\decorators\cache.py"在_wrapped_view_func中44. response = view_func（request，* args，** kwargs）文件"C:\Users\liano\Desktop\python\blog\blog_venv\lib\site-packages\django\contrib\admin\sites.py"在内部223.返回视图（request，* args，** kwargs）文件"C:\Users\liano\Desktop\python\blog\blog_venv\lib\site-packages\django\contrib\admin\options.py" in add_view 1553. return self.changeform_view（request，None，form_url，extra_context）_wrapper 62中的文件"C:\Users\liano\Desktop\python\blog\blog_venv\lib\site-packages\django\utils\decorators.py" . 返回bound_func（* args，** kwargs）文件"C:\Users\liano\Desktop\python\blog\blog_venv\lib\site-packages\django\utils\decorators.py" in _wrapped_view 142. response = view_func（request，* args，** kwargs ）文件"C:\Users\liano\Desktop\python\blog\blog_venv\lib\site-packages\django\utils\decorators.py"在bound_func 58. return func . get （self，type（self））（* args2，** kwargs2）文件"C:\Users\liano\Desktop\python\blog\blog_venv\lib\site-packages\django\contrib\admin\options.py"在changeform_view 1450中 . 返回self._changeform_view（request，object_id，form_url，extra_context）文件"C:\Users\liano\Desktop\python\blog\blog_venv\lib\site-packages\django\contrib\admin\options.py" in _changeform_view 1516.media = self.media adminForm.mediaFile "C:\Users\liano\Desktop\python\blog\blog_venv\lib\site-packages\django\contrib\admin\helpers.py"在媒体64中.media = self.form.mediaFile "C:\Users\liano\Desktop\python\blog\blog_venv\lib\site-packages\django\forms\widgets.py"在_media 148. base = sup_cls.mediaFile "C:\Users\liano\Desktop\python\blog\blog_venv\lib\site-packages\django\forms\widgets.py" in _media 148. base = sup_cls.mediaFile "C:\Users\liano\Desktop\python\blog\blog_venv\lib\site-packages\django\forms\widgets.py" in _media 148. base = sup_cls.mediaFile "C:\Users\liano\Desktop\python\blog\blog_venv\lib\site-packages\django\forms\forms.py" in media 460. media = media field.widget.mediaFile "C:\Users\liano\Desktop\python\blog\blog_venv\lib\site-packages\django\forms\widgets.py" in _media 148. base = sup_cls.mediaFile "C:\Users\liano\Desktop\python\blog\blog_venv\lib\site-packages\django\forms\widgets.py" in _media 163. return m Media（definition）File "C:\Users\liano\Desktop\python\blog\blog_venv\lib\site-packages\django\forms\widgets.py" in add 135. combined._js = self.merge（self._js，other._js）File "C:\Users\liano\Desktop\python\blog\blog_venv\lib\site-packages\django\forms\widgets.py"在合并114. for reverse in reverse（list_2）：Exception Type：TypeError at / admin / blogsite / articles / add / Exception值：'set' object不可逆