为什么 Django 模板模式匹配错误的视图并导致 NoReverseMatch 错误？答案

【问题标题】：Why is Django template pattern matching with wrong view and causing a NoReverseMatch error?为什么 Django 模板模式匹配错误的视图并导致 NoReverseMatch 错误？
【发布时间】：2017-10-07 02:32:54
【问题描述】：

我遇到了 NoReverseMatch 错误。它显示的模式不是它应该与之关联的模式。错误：

NoReverseMatch at /games/list/
Reverse for 'game_single' with keyword arguments '{'pk': ''}' not found. 1 pattern(s) tried: ['games/(?P<pk>\\d+)/$']

当视图应该是“game_list”时，我不明白为什么它试图反转“game_single”

我的主要 urls.py:

从 django.conf.urls 导入包含，url 从 django.contrib 导入管理员

from django.conf.urls import include, url

从 django.contrib 导入管理员

urlpatterns = [
    #leaving the r'' blank between the parenthesis makes it the
    #default URL
    url(r'', include('blog.urls')),
    url(r'^admin/', admin.site.urls),
    url(r'^games/', include('code_games.urls')),
]

我的 code_games 应用程序 urls.py：

from django.conf.urls import url
from . import views

urlpatterns = [
    url(r'^list/$', views.game_list, name='game_list'),
    url(r'(?P<pk>\d+)/$', views.game_single, name='game_single'),
    url(r'^new/$', views.game_new, name='game_new'),
]

我的 code_games 应用程序views.py

#view for seeing all games
def game_list(request):
    games = Game.objects.filter(published_date__lte=timezone.now()).order_by('-published_date')
    return render(request, 'code_games/game_list.html', {'games': games})


#view for seeing/playing an individual game
def game_single(request, pk):
    games = get_object_or_404(Game, pk=pk)
    return render(request, 'code_games/game_single.html', {'games': games})

#view for adding a new game
def game_new(request):
    if request.method == "POST":
        form = GameForm(request.POST)
        if form.is_valid():
            post = form.save(commit=False)
            post.save()
            return redirect('game_single', pk=post.pk)
    else:
        form = GameForm()
    return render(request, 'code_games/game_new.html', {'form': form})

我的模板：

{% extends 'code_games/base.html' %}

{% block content %}
    {% for game in games %}
        <div class="post">
            {% if game.image != 'Null' %}
            <a href="{% url 'game_single' pk=post.pk %}">
                <img src="/static/css/images/{{game.image}}" style="width:640px;height:228px;">
            </a>
            {% endif %}
            <div class="date">
                {{ game.published_date }}
            </div>
            <h1><a href="{% url 'game_single' pk=post.pk %}">{{ game.title }}</a></h1>
            <hr>
        </div>
    {% endfor %}
{% endblock %}

我真的不明白为什么 url 试图与 game_single 视图模式匹配，而它应该是 game_list 视图。

【问题讨论】：

标签： django python-3.x django-templates django-views

【解决方案1】：

我一问这个问题就找到了答案……

我必须改变

<a href="{% url 'game_single' pk=post.pk %}">

到

<a href="{% url 'game_single' pk=game.pk %}">

和

<a href="{% url 'game_single' pk=post.pk %}">{{ game.title }}</a>

到

<a href="{% url 'game_single' pk=game.pk %}">{{ game.title }}</a>

【讨论】：