升级到django 1.7后访问admin中的模型细节时出错

Question

升级到django 1.7之后，在编辑管理页面中的模型(IE单击单个模型的条目以访问其详细信息)时，我得到以下跟踪信息：

在迁移之后，这个应用程序和管理程序似乎在工作，直到我开始这么做。很明显(?)我没有东西的管理端的测试，所以我只有当我尝试它时才发现它。

知道该怎么做才能纠正吗？我是否有一些从1.6中遗留下来的不受支持的旧模板，或者我没有更新一些东西来正确地处理一个新的模板？

Exception Type: AttributeError at /admin/cmh_server/module/7/
In template /Users/mgregory/Documents/virtualenvs/cm_central/lib/python2.7/site-packages/django/contrib/admin/templates/admin/change_form.html, 
error at line 45
'AdminErrorList' object has no attribute 'data'
35      {% if has_absolute_url %}<li><a href="{{ absolute_url }}" class="viewsitelink">{% trans "View on site" %}</a></li>{% endif%}
36      {% endblock %}
37    </ul>
38  {% endif %}{% endif %}
39  {% endblock %}
40  <form {% if has_file_field %}enctype="multipart/form-data" {% endif %}action="{{ form_url }}" method="post" id="{{ opts.model_name }}_form" novalidate>{% csrf_token %}{% block form_top %}{% endblock %}
41  <div>
42  {% if is_popup %}<input type="hidden" name="{{ is_popup_var }}" value="1" />{% endif %}
43  {% if to_field %}<input type="hidden" name="{{ to_field_var }}" value="{{ to_field }}" />{% endif %}
44  {% if save_on_top %}{% block submit_buttons_top %}{% submit_row %}{% endblock %}{% endif %}
45  {% if errors %}
46      <p class="errornote">
47      {% if errors|length == 1 %}{% trans "Please correct the error below." %}{% else %}{% trans "Please correct the errors below." %}{% endif %}
48      </p>
49      {{ adminform.form.non_field_errors }}
50  {% endif %}
51  

完整的回溯(希望我能贴出这个“崩溃”！)

File "/Users/mgregory/Documents/virtualenvs/cm_central/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
  137.                 response = response.render()
File "/Users/mgregory/Documents/virtualenvs/cm_central/lib/python2.7/site-packages/django/template/response.py" in render
  103.             self.content = self.rendered_content
File "/Users/mgregory/Documents/virtualenvs/cm_central/lib/python2.7/site-packages/django/template/response.py" in rendered_content
  80.         content = template.render(context)
File "/Users/mgregory/Documents/virtualenvs/cm_central/lib/python2.7/site-packages/django/template/base.py" in render
  148.             return self._render(context)
File "/Users/mgregory/Documents/virtualenvs/cm_central/lib/python2.7/site-packages/django/template/base.py" in _render
  142.         return self.nodelist.render(context)
File "/Users/mgregory/Documents/virtualenvs/cm_central/lib/python2.7/site-packages/django/template/base.py" in render
  844.                 bit = self.render_node(node, context)
File "/Users/mgregory/Documents/virtualenvs/cm_central/lib/python2.7/site-packages/django/template/debug.py" in render_node
  80.             return node.render(context)
File "/Users/mgregory/Documents/virtualenvs/cm_central/lib/python2.7/site-packages/django/template/loader_tags.py" in render
  126.         return compiled_parent._render(context)
File "/Users/mgregory/Documents/virtualenvs/cm_central/lib/python2.7/site-packages/django/template/base.py" in _render
  142.         return self.nodelist.render(context)
File "/Users/mgregory/Documents/virtualenvs/cm_central/lib/python2.7/site-packages/django/template/base.py" in render
  844.                 bit = self.render_node(node, context)
File "/Users/mgregory/Documents/virtualenvs/cm_central/lib/python2.7/site-packages/django/template/debug.py" in render_node
  80.             return node.render(context)
File "/Users/mgregory/Documents/virtualenvs/cm_central/lib/python2.7/site-packages/django/template/loader_tags.py" in render
  126.         return compiled_parent._render(context)
File "/Users/mgregory/Documents/virtualenvs/cm_central/lib/python2.7/site-packages/django/template/base.py" in _render
  142.         return self.nodelist.render(context)
File "/Users/mgregory/Documents/virtualenvs/cm_central/lib/python2.7/site-packages/django/template/base.py" in render
  844.                 bit = self.render_node(node, context)
File "/Users/mgregory/Documents/virtualenvs/cm_central/lib/python2.7/site-packages/django/template/debug.py" in render_node
  80.             return node.render(context)
File "/Users/mgregory/Documents/virtualenvs/cm_central/lib/python2.7/site-packages/django/template/loader_tags.py" in render
  65.                 result = block.nodelist.render(context)
File "/Users/mgregory/Documents/virtualenvs/cm_central/lib/python2.7/site-packages/django/template/base.py" in render
  844.                 bit = self.render_node(node, context)
File "/Users/mgregory/Documents/virtualenvs/cm_central/lib/python2.7/site-packages/django/template/debug.py" in render_node
  80.             return node.render(context)
File "/Users/mgregory/Documents/virtualenvs/cm_central/lib/python2.7/site-packages/django/template/defaulttags.py" in render
  311.             if match:
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/UserList.py" in __len__
  30.     def __len__(self): return len(self.data)
Exception Type: AttributeError at /admin/cmh_server/module/7/
Exception Value: 'AdminErrorList' object has no attribute 'data'

Answer 1

事实证明，这是由于django的过时版本-嵌套内联。

调试的线索来自于问“这个AdminErrorList是什么？”，这导致了“admin.py中有什么？”，这导致了“哇，这个嵌套行是什么，它是否符合1.7”。

最近有一个关于django的提交--嵌套内联，它引用了与AdminErrorList相关的更新，而这个更改解决了我的问题。

Answer 2

你可能有第二次追踪。尝试直接在命令行中获取主命令，而不是在web浏览器中。尝试用以下方法复制该bug：

python manage.py runserver --traceback --nothreading --noreload

只有第一种选择非常重要。其他选项只简化调试。

您的错误在类ErrorList中。类UserList仅用于Django 1.7，而不用于任何较老的Django，因为以前的任何Django中都不存在该类。