Django- NoReverseMatch at /posts/new/in/group-1/

Question

在我类似论坛的网站上。我想要一个功能，如果用户是小组的一部分，只有这样用户才能选择在小组中发帖。现在，我正试图在URL中传递组段塞，当"；POST"；按钮。但由于某些原因，URL不匹配。有两个不同的应用程序，分别用于群组和帖子。

1. 这是"；group_detail.html"；POST按钮可在用户加入组后单击(行号10(-

{% extends "groups/group_base.html" %}
{% block content %}
<h1>{{group.name}}</h1>
<h2> Member Count: {{group.members.count}}</h2>
<div class="content">

{% if user in group.members.all %}
<a href="{% url 'groups:leave' slug=group.slug %}" class="btn btn-lg btn-fill btn-warning"><span class="glyphicon glyphicon-remove-circle"></span> Leave</a>
//line 10          <a href="{% url 'posts:create1' slug=group.slug %}" class="btn btn-lg btn-fill btn-warning" ><span class="glyphicon glyphicon-ok-circle"></span>Post</a></li>
{% else %}
<a href="{% url 'groups:join' slug=group.slug %}" class="btn btn-lg btn-fill btn-warning"><span class="glyphicon glyphicon-ok-circle"></span> Join</a>
{% endif %}
</div>

2. 这是Post应用程序的urls.py

from django.conf.urls import url
from django.urls import path
from . import views
app_name='posts'
urlpatterns = [
url(r"^$", views.PostList.as_view(), name="all"),
url(r"new/in/(?P<slug>[-w]+)/$", views.CreatePost.as_view(), name="create1"),
url(r"by/(?P<username>[-w]+)/$",views.UserPosts.as_view(),name="for_user"),
url(r"by/(?P<username>[-w]+)/(?P<pk>d+)/$",views.PostDetail.as_view(),name="single"),
url(r"delete/(?P<pk>d+)/$",views.DeletePost.as_view(),name="delete"),
]

3. 这是Post应用程序的视图.py

# from django.shortcuts import render
# # Create your views here.
from django.contrib import messages
from django.contrib.auth.mixins import LoginRequiredMixin
from django.urls import reverse_lazy
from django.http import Http404
from django.views import generic
from django.shortcuts import get_object_or_404
from groups.models import Group
from braces.views import SelectRelatedMixin
from . import forms
from . import models
from django.contrib.auth import get_user_model
User = get_user_model()
class CreatePost(LoginRequiredMixin, SelectRelatedMixin, generic.CreateView):
# form_class = forms.PostForm
fields = ('message',)
model = models.Post
def get(self, request, *args, **kwargs):
group = get_object_or_404(Group,slug=self.kwargs.get("slug"))
# try:
#     GroupMember.objects.create(user=self.request.user,group=group)
# except IntegrityError:
#     messages.warning(self.request,("Warning, already a member of {}".format(group.name)))
# else:
#     messages.success(self.request,"You are now a member of the {} group.".format(group.name))
return super().get(request, *args, **kwargs)

def form_valid(self, form):
self.object = form.save(commit=False)
self.object.user = self.request.user
self.object.group=group
self.object.save()
return super().form_valid(form)

4. 这是post_form.html，即表单模板

{% extends "posts/post_base.html" %}
{% load bootstrap3 %}
{% block content %}
<h4>Create New Post</h4>
//line 7 <form method="POST" action="{% url 'posts:create1' slug=group.slug %}" id="postForm">
{% csrf_token %}
{% bootstrap_form form %}
<input type="submit" value="Post" class="btn btn-primary btn-large">
</form>
{% endblock %}

我在点击帖子按钮时出现以下错误-错误图像

Answer 1

错误来自post-app的"post_form.html"第7行，如注释所示。

将其从-更改

<form method="POST" action="{% url 'posts:create1' slug=group.slug %}" id="postForm">

至

<form method="POST" action="" id="postForm">

我通过将其打印在网页上进行了检查，即使url显示了正确的段塞，该表单中的group.slug也将变为null，因此网页中的{{group.slug}}处没有打印任何内容。

这解决了上述错误

我还为createPost视图更改了post应用程序的views.p，以使我的功能正常工作。在这个过程中，我改变了"；鼻涕虫"；至"；pk"；到处引用带有主键的组。

所以现在所有上面的文件看起来如下(创建帖子功能现在很好(-

1. 这是"；group_detail.html"；POST按钮可在用户加入组后单击(行号10(-

{% extends "groups/group_base.html" %}
{% block content %}
<h1>{{group.name}}</h1>
<h2> Member Count: {{group.members.count}}</h2>
<div class="content">

{% if user in group.members.all %}
<a href="{% url 'groups:leave' slug=group.slug %}" class="btn btn-lg btn-fill btn-warning"><span class="glyphicon glyphicon-remove-circle"></span> Leave</a>
//line 10        <a href="{% url 'posts:create1' pk=group.pk %}" class="btn btn-lg btn-fill btn-warning" ><span class="glyphicon glyphicon-ok-circle"></span>Post</a></li>
{% else %}
<a href="{% url 'groups:join' slug=group.slug %}" class="btn btn-lg btn-fill btn-warning"><span class="glyphicon glyphicon-ok-circle"></span> Join</a>
{% endif %}
</div>

2. 这是Post应用程序的urls.py

from django.conf.urls import url
from django.urls import path
from . import views
app_name='posts'
urlpatterns = [
url(r"^$", views.PostList.as_view(), name="all"),
url(r"new/in/(?P<pk>d+)/$", views.CreatePost.as_view(), name="create1"),
url(r"by/(?P<username>[-w]+)/$",views.UserPosts.as_view(),name="for_user"),
url(r"by/(?P<username>[-w]+)/(?P<pk>d+)/$",views.PostDetail.as_view(),name="single"),
url(r"delete/(?P<pk>d+)/$",views.DeletePost.as_view(),name="delete"),
]

3. 这是post-app的视图.py-

from django.contrib import messages
from django.contrib.auth.mixins import LoginRequiredMixin
from django.urls import reverse_lazy
from django.http import Http404
from django.views import generic
from django.shortcuts import get_object_or_404
from groups.models import Group
from braces.views import SelectRelatedMixin
from . import forms
from . import models
from django.contrib.auth import get_user_model
User = get_user_model()
class CreatePost(LoginRequiredMixin, SelectRelatedMixin, generic.CreateView):
fields = ('message',)
model = models.Post
def form_valid(self, form):
self.object = form.save(commit=False)
self.object.user = self.request.user
self.object.group=get_object_or_404(Group,pk=self.kwargs.get('pk'))
self.object.save()
return super().form_valid(form)

4. 这是post应用程序的post_form.html，即表单模板-

{% extends "posts/post_base.html" %}
{% load bootstrap3 %}
{% block content %}
<h4>Create New Post</h4>
//line 7  <form method="POST" action="" id="postForm">
{% csrf_token %}
{% bootstrap_form form %}
<input type="submit" value="Post" class="btn btn-primary btn-large">
</form>
{% endblock %}