Error: Reverse for 'article-detail' not found. 'article-detail' is not a valid view function or pattern name

Question

我试图在我的一个模型函数中使用 reverse，但是当我将 url 的名称倒过来时，它显示标题错误，我不确定为什么会这样，这里是 url 和模型的代码。

models.py

from django.db import models
from django.contrib.auth.models import User
from django.urls import reverse

# Create your models here.

class Post(models.Model):
    title = models.CharField(max_length= 255)
    author = models.ForeignKey(User, on_delete=models.CASCADE)
    body = models.TextField()

    def __str__(self):
        return self.title + ' | ' + str(self.author)
    
    def get_absolute_url(self):
        return reverse('article-detail', args =(str(self.id)))

app/urls.py

from django.urls import path
from app1 import views
from .views import PostView, ArticleDetailView, AddPostView

app_name = 'app1'

urlpatterns = [
    path('register/', views.register, name = 'register'),
    path('user_login/', views.user_login, name = 'user_login'),
    path('post/', PostView.as_view(), name = 'Post'),
    path('article/<int:pk>', ArticleDetailView.as_view(), name = 'article-detail'),
    path('add_post/',AddPostView.as_view(), name='addpost')
]

urls.py

from django.contrib import admin
from django.urls import path, include
from app1 import views

urlpatterns = [
    path('admin/', admin.site.urls),
    path('', views.index, name = "index"),
    path('app1/', include('app1.urls')),
    path('logout/', views.user_logout, name='logout')
    
]

如果有人能告诉我为什么显示此错误，我将不胜感激，我确定它在 models.py 的最后一行，但我不明白为什么会弹出，因为该名称与我要调用的 url 匹配。

Answer 1

您忘记提及 app_name。试试这个

class Post(models.Model):
    title = models.CharField(max_length= 255)
    author = models.ForeignKey(User, on_delete=models.CASCADE)
    body = models.TextField()

    def __str__(self):
        return self.title + ' | ' + str(self.author)
    
    def get_absolute_url(self):
        # return reverse('article-detail', args =(str(self.id)))
        return reverse('app1:article-detail', args = [str(self.id))]

Error: Reverse for 'article-detail' not found. 'article-detail' is not a valid view function or pattern name

Error: Reverse for 'article-detail' not found. 'article-detail' is not a valid view function or pattern name

python

django

url

post

frame