Django：带有PK问题的DetailView URL答案

【问题标题】：Django: DetailView URL with PK IssueDjango：带有PK问题的DetailView URL
【发布时间】：2018-07-18 01:21:04
【问题描述】：

我是 Django 新手，我正在尝试构建一个教堂目录应用程序来管理教堂（羊群）中的用户（绵羊）。在我为名为 ChurchMembers 的模型添加 CBV - DetailView 之前，一切似乎都有效。我想使用 ChurchMember 的 pk 为成员创建一个 DetailView 以拥有个人资料。

我在调试中收到以下错误消息：

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

这是我的views.py（只显示有问题的DetailView）：

class view_member_detail(DetailView):
model = models.ChurchMember
template_name = 'flock_app/member_profile.html'
context_object_name = 'member_detail'
pk_url_kwarg = 'member_pk'

我有一种预感，这与我的 urls.py 文件的设置方式有关。可能是不正确的正则表达式，或者可能是错误的排序。 urls.py 如下：

app_name = 'flock_app'

urlpatterns = [
    url(r'^$', views.home, name='home'),
    url(r'^register/$', views.register, name='register'),
    url(r'^login/$', views.user_login, name='user_login'),
    url(r'^logout/$', views.user_logout, name='user_logout'),
    url(r'^add_church/$', views.add_church, name='add_church'),
    url(r'^add_member/$', views.add_member, name='add_member'),
    url(r'^members/$', views.view_members_list.as_view(), name='view_members_list'),
    url(r'^members/(?P<member_pk>\d+)/$', views.view_member_detail.as_view(), name='view_member_detail'),
    url(r'^churches2/$', views.view_churches_list.as_view(), name='view_churches_list'),
    url(r'^(?P<pk>[-\w]+)/$', views.view_churches_detail.as_view(), name='view_churches_detail'),
    url(r'^update/(?P<pk>\d+)/$', views.update_church_detail.as_view(), name='update_church_detail'),
    url(r'^delete/(?P<pk>[-\w]+)/$', views.delete_church.as_view(), name='delete_church'),
    url(r'^home', views.home, name='home')
]

这是我从 HTML 调用 DetailView：

  <div class="dropdown-menu" aria-labelledby="dropdownMenuLink">
    <a class="dropdown-item" href="{% url 'flock_app:view_member_detail' pk=mem.member_pk %}">Sheep Profile</a>
    <a class="dropdown-item" href="#">Delete sheep</a>
  <div/>

任何帮助将不胜感激！

编辑 - 添加 HTML 的源代码

{% extends 'flock_app/base.html' %}
{% load crispy_forms_tags %}

{%  block body_block%}

<div class="jumbotron">
  {% if members %}

  <h1 class="display-3 text-center">All Sheep in Flocks <button type="button" class="btn btn-outline-secondary" onclick="location.href='{% url 'flock_app:add_member' %}'">Add Sheep</button></h1>
  <table class="table table-hover">
    <thead class=>
      <tr>
        <th scope="col"></th>
        <th scope="col">Flock</th>
        <th scope="col">First Name</th>
        <th scope="col">Last Name</th>
        <th scope="col">Email</th>
        <th scope="col">Phone</th>
        <th></th>
      </tr>
    </thead>
    {% for mem in members %}
    <tbody>
      <tr>
        <th scope="row"></th>
        <td>{{ mem.Flock }}</td>
        <td>{{ mem.First_Name }}</td>
        <td>{{ mem.Last_Name }}</td>
        <td>{{ mem.Email }}</td>
        <td>{{ mem.Phone_Number }}</td>
        <td>
          <div class="dropdown">
            <a class="btn btn-outline-secondary dropdown-toggle" href="#" role="button" id="dropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Manage</a></th>
          <div/>
          <div class="dropdown-menu" aria-labelledby="dropdownMenuLink">
            <a class="dropdown-item" href="{% url 'flock_app:view_member_detail' pk=mem.member_pk %}">Sheep Profile</a>
            <a class="dropdown-item" href="#">Delete sheep</a>
          <div/>
        </td>
      </tr>
      {% endfor %}
      <table/>
  {% else %}

    <h1 class="text-center">No Sheep Found</h1>
    <h1 class="lead text-center">Click <a href="{% url 'flock_app:add_member' %}">here</a> to add Sheep to <em>His</em>_Flock</h2>

  {% endif %}


</div>
{% endblock %}

编辑 2 - DJANGO 错误代码

NoReverseMatch at /flock/members/
Reverse for 'view_member_detail' with keyword arguments '{'pk': ''}' not found. 1 pattern(s) tried: ['flock/members/(?P<member_pk>\\d+)/$']
Request Method: GET
Request URL:    http://127.0.0.1:8000/flock/members/
Django Version: 1.11.7
Exception Type: NoReverseMatch
Exception Value:    
Reverse for 'view_member_detail' with keyword arguments '{'pk': ''}' not found. 1 pattern(s) tried: ['flock/members/(?P<member_pk>\\d+)/$']
Exception Location: C:\Program Files\Python35\lib\site-packages\django\urls\resolvers.py in _reverse_with_prefix, line 497
Python Executable:  C:\Program Files\Python35\python.exe
Python Version: 3.5.4
Python Path:    
['C:\\Users\\gabrielcastillo\\Google Drive\\git_base\\flock',
 'C:\\Program Files\\Python35\\python35.zip',
 'C:\\Program Files\\Python35\\DLLs',
 'C:\\Program Files\\Python35\\lib',
 'C:\\Program Files\\Python35',
 'C:\\Program Files\\Python35\\lib\\site-packages',
 'C:\\Program Files\\Python35\\lib\\site-packages\\win32',
 'C:\\Program Files\\Python35\\lib\\site-packages\\win32\\lib',
 'C:\\Program Files\\Python35\\lib\\site-packages\\Pythonwin']
Server time:    Wed, 18 Jul 2018 02:21:37 +0000
Error during template rendering
In template C:\Users\gabrielcastillo\Google Drive\git_base\flock\templates\flock_app\base.html, error at line 0

Reverse for 'view_member_detail' with keyword arguments '{'pk': ''}' not found. 1 pattern(s) tried: ['flock/members/(?P<member_pk>\\d+)/$']

【问题讨论】：

标签： python regex django webapp2 keyword-argument

【解决方案1】：

网址从

改变

url(r'^members/(?P<member_pk>\d+)/$', views.view_member_detail.as_view(), name='view_member_detail'),

到

url(r'^members/(?P<pk>\d+)/$', views.view_member_detail.as_view(), name='view_member_detail'),

【讨论】：

感谢您的快速回复！不幸的是，这并没有解决它。同样的错误。
我正在为 2 个不同的模型调用 pk。 Django 会不会把它们混在一起？
确保你的 mem.member_pk 不是 '' 通过在模板中使用 {{mem.member_pk}} 列出它
我刚试过这个！还是没有解决。我现在没有收到错误页面！我可以点击链接，但它不会带我去任何地方，网址也不会改变。
把<a class="dropdown-item" href="{% url 'flock_app:view_member_detail' pk=mem.member_pk %}">Sheep Profile</a>的源码贴在html里

【解决方案2】：

我已经解决了这个问题！看起来我在 HTML 页面中调用了另一个视图，该视图引发了错误。一旦清除，我就可以使用相应的 ok 信息访问我的所有页面！

【讨论】：