因此，我尝试为文章添加类别，但出现KeyError。这是我的模型：
class Category(models.Model):
title = models.CharField(max_length=100, db_index=True, null=True, blank=True)
slug = models.SlugField(max_length=100, db_index=True)
def __str__(self):
return self.title
@permalink
def get_absolute_url(self):
return ('view_blog_category', None, { 'slug': self.slug })
这是我的视图和网址：
def view_category(request, slug):
category = get_object_or_404(Category, slug=slug)
return render_to_response('news/view_category.html', {'category': category,'posts': Article.objects.filter(category=category)[:5]})
urlpatterns = [
url(r'^news/(?P<slug>[^\.]+)', ArticleView.as_view() , name='view_blog_post'),
url(r'^category/(?P<slug>[^\.]+).html', view_category, name='view_blog_category'),
]
当我进入通过django admin添加的类别时，我得到一个KeyError at /category/news.html 'request'，并且在呈现包含标记时显示错误。 （边栏）如果我删除此包含标记，则KeyError消失。但是在其他所有页面上，included标签也可以正常工作。仅在此类别页面上没有。有什么问题吗？
我认为我的网址有问题，但似乎找不到问题。
回溯：
Environment:
Request Method: GET
Request URL: http://localhost:8000/category/news.html
Django Version: 1.11
Python Version: 3.6.8
Installed Applications:
['django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'django.contrib.sites',
'home',
'news',
'dynamic_scraper',
'taggit']
Installed Middleware:
['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',
'django.contrib.sites.middleware.CurrentSiteMiddleware']
Template error:
In template /Users/rafrasenberg/cryptoupdate/src/cryptoupdate/home/templates/header.html, error at line 41
request 31 : <i class="close-icn ion-close"></i>
32 : </a>
33 : <div class="src-form">
34 : <form>
35 : <input type="text" placeholder="Search here">
36 : <button type="submit"><i class="ion-search"></i></a></button>
37 : </form>
38 : </div><!-- src-form -->
39 :
40 : <a class="menu-nav-icon" data-menu="#main-menu" href="#"><i class="ion-navicon"></i></a>
41 : {% header_menu %}
42 : <div class="clearfix"></div>
43 : </div><!-- container -->
44 : </header>
45 :
Traceback:
File "/Users/rafrasenberg/cryptoupdate/lib/python3.6/site-packages/django/core/handlers/exception.py" in inner
41. response = get_response(request)
File "/Users/rafrasenberg/cryptoupdate/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
187. response = self.process_exception_by_middleware(e, request)
File "/Users/rafrasenberg/cryptoupdate/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
185. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/Users/rafrasenberg/cryptoupdate/src/cryptoupdate/news/views.py" in view_category
20. return render_to_response('news/view_category.html', {'category': category,'posts': Article.objects.all()})
File "/Users/rafrasenberg/cryptoupdate/lib/python3.6/site-packages/django/shortcuts.py" in render_to_response
21. content = loader.render_to_string(template_name, context, using=using)
File "/Users/rafrasenberg/cryptoupdate/lib/python3.6/site-packages/django/template/loader.py" in render_to_string
68. return template.render(context, request)
File "/Users/rafrasenberg/cryptoupdate/lib/python3.6/site-packages/django/template/backends/django.py" in render
66. return self.template.render(context)
File "/Users/rafrasenberg/cryptoupdate/lib/python3.6/site-packages/django/template/base.py" in render
207. return self._render(context)
File "/Users/rafrasenberg/cryptoupdate/lib/python3.6/site-packages/django/template/base.py" in _render
199. return self.nodelist.render(context)
File "/Users/rafrasenberg/cryptoupdate/lib/python3.6/site-packages/django/template/base.py" in render
990. bit = node.render_annotated(context)
File "/Users/rafrasenberg/cryptoupdate/lib/python3.6/site-packages/django/template/base.py" in render_annotated
957. return self.render(context)
File "/Users/rafrasenberg/cryptoupdate/lib/python3.6/site-packages/django/template/loader_tags.py" in render
177. return compiled_parent._render(context)
File "/Users/rafrasenberg/cryptoupdate/lib/python3.6/site-packages/django/template/base.py" in _render
199. return self.nodelist.render(context)
File "/Users/rafrasenberg/cryptoupdate/lib/python3.6/site-packages/django/template/base.py" in render
990. bit = node.render_annotated(context)
File "/Users/rafrasenberg/cryptoupdate/lib/python3.6/site-packages/django/template/base.py" in render_annotated
957. return self.render(context)
File "/Users/rafrasenberg/cryptoupdate/lib/python3.6/site-packages/django/template/loader_tags.py" in render
216. return template.render(context)
File "/Users/rafrasenberg/cryptoupdate/lib/python3.6/site-packages/django/template/base.py" in render
209. return self._render(context)
File "/Users/rafrasenberg/cryptoupdate/lib/python3.6/site-packages/django/template/base.py" in _render
199. return self.nodelist.render(context)
File "/Users/rafrasenberg/cryptoupdate/lib/python3.6/site-packages/django/template/base.py" in render
990. bit = node.render_annotated(context)
File "/Users/rafrasenberg/cryptoupdate/lib/python3.6/site-packages/django/template/base.py" in render_annotated
957. return self.render(context)
File "/Users/rafrasenberg/cryptoupdate/lib/python3.6/site-packages/django/template/library.py" in render
225. _dict = self.func(*resolved_args, **resolved_kwargs)
File "/Users/rafrasenberg/cryptoupdate/src/cryptoupdate/home/templatetags/header_menu.py" in header_menu
11. 'request': context['request'],
File "/Users/rafrasenberg/cryptoupdate/lib/python3.6/site-packages/django/template/context.py" in __getitem__
87. raise KeyError(key)
Exception Type: KeyError at /category/news.html
Exception Value: 'request'
编辑后的模板标签
@register.simple_tag(takes_context=True)
def header_menu(context):
return {
'header_menu': MenuItem.objects.all(),
'request': context['request'],
}
答案 0 :(得分：1)
render_to_response未通过请求。您应该改用render。
return render(request, 'news/view_category.html', ...)
但是尚不清楚为什么您仍要在标记代码中引用该请求。您不在那里使用它，是从上下文中仅将其直接传递回来的意义何在？
答案 1 :(得分：0)
错误在这里：
'request': context['request']
在您的header_menu模板标记中。您应该将模板标签装饰器更改为：
@register.simple_tag(takes_context=True)
def header_menu(context):
# your template tag code
以便它可以使用视图传递的上下文