来自 Django 2.0 管理模板的莫名其妙的异常

Question

这是一个奇怪的（对我来说）调试问题。我有一个 Django 2.0 应用程序，其中包含三个应用程序 - app1、app2 和 app3。 app1 很久以前就可以工作了，app2 和 app3 也是如此。在这一点上，我只对所有三个应用程序使用管理界面。我在 app3 中做了一些工作来优化一些代码。我完成了它并在 app1 上运行了一些快速测试，结果它崩溃了。我可以访问 app1 中所有模型的主管理页面，但是当我单击更改页面时出现此错误

Template error:
In template /home/mark/python-projects/memorabilia-JSON/memorabilia/templates/admin/memorabilia/change_form.html, error at line 14
   Could not parse the remainder: '>' from ''</table'>'
   4 : 
   5 : {% for fieldset in adminform %}
   6 :   {% cycle '<table border=0 width=100%>' ' ' %}
   7 :   {% cycle '<tr>' ' ' %}
   8 :   {% cycle '<td width =50%’ ‘td width =50%>' ' ' %}
   9 :   
   10 :   {% include "admin/includes/fieldset.html" %}
   11 :   
   12 :   {% cycle '</td>' '</td>' ' ' %}
   13 :   {% cycle  '</tr>' ' '%}
   14 :    {% cycle  '</table'> ' ' %} 
   15 :   
   16 : {% endfor %}
   17 : {% endblock %}
   18 : 
   19 : 

Traceback:

File "/home/mark/.virtualenvs/memorabilia-JSON/lib/python3.6/site-packages/django/core/handlers/exception.py" in inner
  35.             response = get_response(request)

File "/home/mark/.virtualenvs/memorabilia-JSON/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
  158.                 response = self.process_exception_by_middleware(e, request)

File "/home/mark/.virtualenvs/memorabilia-JSON/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
  156.                 response = response.render()

File "/home/mark/.virtualenvs/memorabilia-JSON/lib/python3.6/site-packages/django/template/response.py" in render
  106.             self.content = self.rendered_content

File "/home/mark/.virtualenvs/memorabilia-JSON/lib/python3.6/site-packages/django/template/response.py" in rendered_content
  81.         template = self.resolve_template(self.template_name)

File "/home/mark/.virtualenvs/memorabilia-JSON/lib/python3.6/site-packages/django/template/response.py" in resolve_template
  63.             return select_template(template, using=self.using)

File "/home/mark/.virtualenvs/memorabilia-JSON/lib/python3.6/site-packages/django/template/loader.py" in select_template
  42.                 return engine.get_template(template_name)

File "/home/mark/.virtualenvs/memorabilia-JSON/lib/python3.6/site-packages/django/template/backends/django.py" in get_template
  34.             return Template(self.engine.get_template(template_name), self)

File "/home/mark/.virtualenvs/memorabilia-JSON/lib/python3.6/site-packages/django/template/engine.py" in get_template
  144.         template, origin = self.find_template(template_name)

File "/home/mark/.virtualenvs/memorabilia-JSON/lib/python3.6/site-packages/django/template/engine.py" in find_template
  126.                 template = loader.get_template(name, skip=skip)

File "/home/mark/.virtualenvs/memorabilia-JSON/lib/python3.6/site-packages/django/template/loaders/base.py" in get_template
  30.                     contents, origin, origin.template_name, self.engine,

File "/home/mark/.virtualenvs/memorabilia-JSON/lib/python3.6/site-packages/django/template/base.py" in __init__
  160.         self.nodelist = self.compile_nodelist()

File "/home/mark/.virtualenvs/memorabilia-JSON/lib/python3.6/site-packages/django/template/base.py" in compile_nodelist
  198.             return parser.parse()

File "/home/mark/.virtualenvs/memorabilia-JSON/lib/python3.6/site-packages/django/template/base.py" in parse
  483.                     raise self.error(token, e)

File "/home/mark/.virtualenvs/memorabilia-JSON/lib/python3.6/site-packages/django/template/base.py" in parse
  481.                     compiled_result = compile_func(self, token)

File "/home/mark/.virtualenvs/memorabilia-JSON/lib/python3.6/site-packages/django/template/loader_tags.py" in do_extends
  290.     nodelist = parser.parse()

File "/home/mark/.virtualenvs/memorabilia-JSON/lib/python3.6/site-packages/django/template/base.py" in parse
  483.                     raise self.error(token, e)

File "/home/mark/.virtualenvs/memorabilia-JSON/lib/python3.6/site-packages/django/template/base.py" in parse
  481.                     compiled_result = compile_func(self, token)

File "/home/mark/.virtualenvs/memorabilia-JSON/lib/python3.6/site-packages/django/template/loader_tags.py" in do_block
  233.     nodelist = parser.parse(('endblock',))

File "/home/mark/.virtualenvs/memorabilia-JSON/lib/python3.6/site-packages/django/template/base.py" in parse
  483.                     raise self.error(token, e)

File "/home/mark/.virtualenvs/memorabilia-JSON/lib/python3.6/site-packages/django/template/base.py" in parse
  481.                     compiled_result = compile_func(self, token)

File "/home/mark/.virtualenvs/memorabilia-JSON/lib/python3.6/site-packages/django/template/defaulttags.py" in do_for
  815.     nodelist_loop = parser.parse(('empty', 'endfor',))

File "/home/mark/.virtualenvs/memorabilia-JSON/lib/python3.6/site-packages/django/template/base.py" in parse
  483.                     raise self.error(token, e)

File "/home/mark/.virtualenvs/memorabilia-JSON/lib/python3.6/site-packages/django/template/base.py" in parse
  481.                     compiled_result = compile_func(self, token)

File "/home/mark/.virtualenvs/memorabilia-JSON/lib/python3.6/site-packages/django/template/defaulttags.py" in cycle
  628.         values = [parser.compile_filter(arg) for arg in args[1:]]

File "/home/mark/.virtualenvs/memorabilia-JSON/lib/python3.6/site-packages/django/template/defaulttags.py" in <listcomp>
  628.         values = [parser.compile_filter(arg) for arg in args[1:]]

File "/home/mark/.virtualenvs/memorabilia-JSON/lib/python3.6/site-packages/django/template/base.py" in compile_filter
  568.         return FilterExpression(token, self)

File "/home/mark/.virtualenvs/memorabilia-JSON/lib/python3.6/site-packages/django/template/base.py" in __init__
  668.                                       "from '%s'" % (token[upto:], token))

Exception Type: TemplateSyntaxError at /admin/memorabilia/collection/1/change/
Exception Value: Could not parse the remainder: '>' from ''</table'>'

app2 和 app3 的管理页面都没有这个错误 - 它们工作得很好。我从未接触过任何应用程序的管理模板。我尝试在 admin.py 和 app1 的所有 .py 文件与早期版本之间进行比较，并且没有区别。我还查看了早期版本的 app2 和 app3 中 .py 文件的差异，唯一的更改是我所做的更改，当我对这些应用程序中的模型使用管理员更改表单时，它们都没有抛出和错误.

我不知道如何追踪这个错误的来源，因为它来自 Django 代码的内部。任何建议将不胜感激！

标记

Answer 1

错误在您的模板中。你在错误的地方引用了：

14 :    {% cycle  '</table'> ' ' %} 

应该是：

14 :    {% cycle  '</table>' ' ' %} 

根据回溯，这是在memorabilia-JSON/memorabilia/templates/admin/memorabilia/change_form.html。