我使context_processors将数据（“联赛”类的对象）传递给“ base.html”，但是当我单击锚标签之一（包含联赛对象）时，它产生了“ TypeError'联赛'对象不可迭代”
我试图将数据传递给'base.html'....以提供将该数据传递给所有视图 'context_processors.py'
from .models import League
def add_to_base(request):
return {
'league' : League.objects.all()
}
'base.html'
<div id="league-container">
{% for l in league %}
<a href="{% url 'core:openleague' l.pk %}"><h2>{{ l.leagues }}</h2></a>
{% endfor %}
</div>
this is view function
def openleague(request, pk):
league = League.objects.get(pk=pk)
news = league.news.filter(publication_date__lte=timezone.now()).order_by('-publication_date')[:20]
return render(request, 'core/openleague.html', {'league':league,'news':news})
and this is traceback
Support
TypeError at /11/openleague/ by Django
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Environment:
Request Method: GET
Request URL: http://127.0.0.1:8000/11/openleague/
Django Version: 2.1.4
Python Version: 3.5.2
Installed Applications:
['core.apps.CoreConfig',
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'django_social_share']
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']
Template error:
In template /home/omar/my-django/arena/templates/base.html, error at line 36
'League' object is not iterable
26 :
27 :
28 :
29 : <li><a href="{% url 'core:home' %}" >الرئيسية</a></li>
30 : </ul>
31 : {% if user.is_authenticated %}
32 : <h4>logged in as {{ user.username }}</h4>
33 : {% endif %}
34 : <div id="league-container">
35 :
36 : {% for l in league %}
37 : <a href="{% url 'core:openleague' l.pk %}"><h2>{{ l.leagues }}</h2></a>
38 : {% endfor %}
39 : </div>
40 : </nav>
41 :
42 : <main>
43 : {% block content %}
44 : {% endblock %}
45 : </main>
46 :
Traceback:
File "/home/omar/my-django/env/lib/python3.5/site-packages/django/core/handlers/exception.py" in inner
34. response = get_response(request)
File "/home/omar/my-django/env/lib/python3.5/site-packages/django/core/handlers/base.py" in _get_response
126. response = self.process_exception_by_middleware(e, request)
File "/home/omar/my-django/env/lib/python3.5/site-packages/django/core/handlers/base.py" in _get_response
124. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/home/omar/my-django/arena/core/views.py" in openleague
31. return render(request, 'core/openleague.html', {'league':league,'news':news})
File "/home/omar/my-django/env/lib/python3.5/site-packages/django/shortcuts.py" in render
36. content = loader.render_to_string(template_name, context, request, using=using)
File "/home/omar/my-django/env/lib/python3.5/site-packages/django/template/loader.py" in render_to_string
62. return template.render(context, request)
File "/home/omar/my-django/env/lib/python3.5/site-packages/django/template/backends/django.py" in render
61. return self.template.render(context)
File "/home/omar/my-django/env/lib/python3.5/site-packages/django/template/base.py" in render
171. return self._render(context)
File "/home/omar/my-django/env/lib/python3.5/site-packages/django/template/base.py" in _render
163. return self.nodelist.render(context)
File "/home/omar/my-django/env/lib/python3.5/site-packages/django/template/base.py" in render
937. bit = node.render_annotated(context)
File "/home/omar/my-django/env/lib/python3.5/site-packages/django/template/base.py" in render_annotated
904. return self.render(context)
File "/home/omar/my-django/env/lib/python3.5/site-packages/django/template/loader_tags.py" in render
150. return compiled_parent._render(context)
File "/home/omar/my-django/env/lib/python3.5/site-packages/django/template/base.py" in _render
163. return self.nodelist.render(context)
File "/home/omar/my-django/env/lib/python3.5/site-packages/django/template/base.py" in render
937. bit = node.render_annotated(context)
File "/home/omar/my-django/env/lib/python3.5/site-packages/django/template/base.py" in render_annotated
904. return self.render(context)
File "/home/omar/my-django/env/lib/python3.5/site-packages/django/template/defaulttags.py" in render
165. values = list(values)
Exception Type: TypeError at /11/openleague/
Exception Value: 'League' object is not iterable
答案 0 :(得分：1)
在您的应用中创建一个context_processor.py
from .models import League
def add_to_base(request):
return {
'league_from_processor' : League.objects.all()
}
在项目设置中添加settings.py将此添加到TEMPLATES => OPTIONS => context_processors列表中
"app_name.context_processor.add_to_base",
'base.html'
<div id="league-container">
{% for l in league_from_processor %}
<a href="{% url 'core:openleague' l.pk %}"><h2>{{ l.leagues }}</h2></a>
{% endfor %}
</div>