Djangoで CreateViewにおいて送信後、画面が遷移されない

DjangoにてTemplateViewを使って、サイト構築中です。

Createviewで、Reverselazy後に設定したパターンネームが違っているのかエラーが出ます。

データに書き込まれているので、データ送信までは確認できました。
その後、画面遷移でエラーが起きています。
appname:indexとしていますが、"逆引き名が違う"と遷移先に行きません。

Python
1エラー文
2
3NoReverseMatch at /post_create/
4Reverse for 'index' not found. 'index' is not a valid view function or pattern name.
5Request Method:	POST
6Request URL:	http://127.0.0.1:8000/post_create/
7Django Version:	3.0.4
8Exception Type:	NoReverseMatch
9Exception Value:	
10Reverse for 'index' not found. 'index' is not a valid view function or pattern name.

Python
1base.html
2
3{% load static %}
4<!DOCTYPE html>
5<html lang="ja">
6<head>
7    <meta charset="UTF-8">
8    <meta http-equiv="X-UA-Compatible" content="IE=edge">
9    <meta name="viewport" content="width=device-width, initial-scale=1.0">
10    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta1/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-giJF6kkoqNQ00vy+HMDP7azOuL0xtbfIcaT9wjKHr8RbDVddVHyTfAAsrekwKmP1" crossorigin="anonymous">
11    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta1/dist/js/bootstrap.bundle.min.js" integrity="sha384-ygbV9kiqUc6oa4msXn9868pTtWMgiQaeYH7/t7LECLbyPA2x65Kgf80OJFdroafW" crossorigin="anonymous"></script>
12    <link rel="stylesheet" type="text/css" href="{% static 'app/style.css' %}">
13</head>
14<body>
15    <nav class="navbar navbar-expand-lg navbar-light bg-light">
16        <div class="container-fluid">
17          <a class="navbar-brand" href="/">Home</a>
18          <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarNavAltMarkup" aria-controls="navbarNavAltMarkup" aria-expanded="false" aria-label="Toggle navigation">
19            <span class="navbar-toggler-icon"></span>
20          </button>
21          <div class="collapse navbar-collapse" id="navbarNavAltMarkup">
22            <div class="navbar-nav">
23                <a class="nav-link active" aria-current="page" href="{% url 'app:post_create' %}">Tweet</a>
24
25            </div>
26          </div>
27        </div>
28      </nav>
29
30        <div class="container">
31 
32        <div class="card">
33                    {% block content %}
34                    {% endblock %}
35            </div>
36        </div> 
37    </div>
38</div>
39</body>
40</html>
41

Python
1index.html
2
3{% extends 'app/base.html' %}
4{% load static %}
5
6
7{% block content %}
8<h1 style="text-align:center; color:white; background-color:skyblue;">{% block title %}Time_Line_Site{% endblock%}</h1>
9    {% for tweet in tweet_list %}
10            <div class="row">
11                <div class="col">
12                    <div class="cardbody">
13                    <div class="card-title"><strong>@{{tweet.name}}</strong></span>
14                        <span>{{tweet.created_at}}</span>
15                        <div class="mx-auto" style="width: 500px;">
16                            <div class= "card-text">{{ tweet.tweet|linebreaksbr }}</div> 
17                        </div>
18                        <div class="border-bottom"></div>
19                    </div>
20                    </div>
21                </div>
22
23    {% endfor %}
24{% endblock%}
25
26
27

Python
1post_create.html
2
3{% extends 'app/base.html' %}
4{% load static %}
5
6
7{% block content %}
8    <form action="" method="post">
9    {% csrf_token %}
10    {{ form.as_p }}
11    <div class="input-group">
12          <button type="submit" class="btn btn-primary" >Add New</button>
13      </div>
14    </form>
15  {% endblock%}
16

Python
1urls.py
2
3from django.urls import path
4
5from .views import IndexView, PostCreateView
6from . import views
7app_name = "app"
8
9urlpatterns = [
10    path("",IndexView.as_view(template_name= "app/index.html")),
11    path("post_create/",PostCreateView.as_view(),name="post_create"),
12]
13

Python
1views.py
2
3from django.contrib.messages.api import success
4from django.views.generic import ListView,TemplateView, CreateView
5from django.shortcuts import render
6from .models import User
7from django.contrib import messages
8from django.urls import reverse_lazy
9
10
11class IndexView(ListView):
12    model = User
13    template_name = "index.html"
14    context_object_name = 'tweet_list'
15    paginate_by = 10
16
17
18class PostCreateView(CreateView):
19    model = User
20    template_name = "app/post_create.html"
21    fields = '__all__'
22    success_url = reverse_lazy("app:index")
23
24

行動規範の内容に同意します

回答1件

自己解決

テンプレートネーム、ルートディレクトリにならい、名前空間を変更

Python
1views.py
2
3class IndexView(ListView):
4    model = User
5    template_name = "app/index.html"  #修正 app追加　
6    context_object_name = 'tweet_list'
7

Python
1urls.py
2
3urlpatterns = [
4    path("",IndexView.as_view(),name= "index"), #修正　templatename→逆引き名に変更　
5    path("post_create/",PostCreateView.as_view(),name="post_create"),
6]