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

Question

在我的论坛之类的网站。我想要一个功能，其中如果用户是组的一部分，则只有用户可以选择组中的 post。现在，我试图在单击“POST”按钮时在 URL 中传递 group slug。但是 URL 与某些 reason.There 不匹配，分别是两个不同的群组应用程序和 posts。

这是“group_detail.html”POST 按钮可以在用户加入群组后单击（第 10 行）-

{% 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>

这是 Post 应用的 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"),
]

这是 Post 应用的 views.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)

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 %}

单击 post 按钮时出现以下错误- error image

Answer 1

错误来自 post 应用程序的 'post_form.html' 第 7 行，如评论所述。

将其更改为-

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

到-

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

我通过在网页上打印它来检查它，即使 url 显示正确的 slug，group.slug 在此表单中变为空，因此在 {{ group.slug } 处没有打印任何内容} 在网页中。

这解决了上面的错误。

我还更改了 post 应用程序的 views.p 以创建 Post 视图以使我的功能正常工作。在这个过程中，我到处都将“slug”更改为“pk”，以使用其主键引用该组。

所以现在以上所有文件看起来如下（创建 post 功能有效 [erfectl 现在很好）-

这是“group_detail.html”POST 按钮可以在用户加入群组后单击（第 10 行）-

{% 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>

这是 Post 应用的 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"),
]

这是 post 应用的 views.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)

这是 post 应用的 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 %}

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

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

django-urls