'NoReverseMatch at /blog/' 即使在请求列表视图时,程序也会查找详细视图
'NoReverseMatch at /blog/' even when asking for a list view the program looks for a detail view
这个问题出自'Django 2 by example'一书,之前也被问过很多次了,虽然我都检查了所有的答案还是无法解决问题。
我唯一与本书不同的地方是在 'my_project' 项目(包含其他应用程序)而不是 'mysite' 项目目录中创建 'blog' 应用程序。
我的错误是这样的:
my_project/urls.py:
from django.contrib import admin
from django.urls import path, include
from person import views
from accounts.views import RegisterView # register
urlpatterns = [
path('admin/', admin.site.urls),
path('', views.home_view, name='home'),
path('person/', include('person.urls')),
path('create/', include('person.urls')),
path('accounts/', include('django.contrib.auth.urls')),
path('accounts/register/', RegisterView.as_view(), name='register'),
path('shopping-cart/', include('shopping_cart.urls')),
path('blog/', include('blog.urls', namespace='blog')),
]
我的blog/urls.py:
from django.urls import path
from . import views
app_name = 'blog'
urlpatterns = [
path('', views.post_list, name='post_list'),
path('<int:year>/<int:month>/<int:day>/<slug:post>/', views.post_detail, name='post_detail'),
]
我的models.py:
from django.contrib.auth.models import User
from django.db import models
from django.utils import timezone
from django.urls import reverse
class PublishManager(models.Manager):
def get_queryset(self):
return super(PublishManager, self).get_queryset().filter(status='published')
class Post(models.Model):
STATUS_CHOICES = (
('draft', 'Draft'),
('published', 'Published'),
)
title = models.CharField(max_length=250)
slug = models.SlugField(max_length=250, unique_for_date='publish')
author = models.ForeignKey(User, on_delete=models.CASCADE, related_name='blog_post')
body = models.TextField()
publish = models.DateTimeField(default=timezone.now)
created = models.DateTimeField(auto_now_add=True)
updated = models.DateTimeField(auto_now=True)
status = models.CharField(max_length=10, choices=STATUS_CHOICES, default='draft')
object = models.Manager() # The default manager.
published = PublishManager() # My custom manager
class Meta:
ordering = ('-publish',)
def __str__(self):
return self.title
def get_absolute_url(self):
return reverse(
'blog:post_detail',
args=[
'self.publish.year',
'self.publish.month',
'self.publish.day',
'self.slug',
]
)
我的views.py:
from django.shortcuts import render, get_object_or_404
from .models import Post
def post_list(request):
posts = Post.published.all()
return render(request, 'blog/post/list.html', {'posts': posts})
def post_detail(request, year, month, day, post):
post = get_object_or_404(Post,
slug=post,
status='published',
publish__year=year,
publish__month=month,
publish__day=day)
return render(request, 'blog/post/detail.html', {'post': post})
list.html:
{% extends 'base.html' %}
{% block content %}
<h1>My Blog</h1>
{% for post in posts %}
<h2>
<a href="{{ post.get_absolute_url }}">
{{ post.title }}
</a>
</h2>
<p class="date">
Published {{ post.publish }} by {{ post.author }}
</p>
{{ post.body|truncatewords:30|linebreaks }}
{% endfor %}
{% endblock %}
details.html:
{% extends 'base.html' %}
{% block content %}
<h1>{{ post.title }}</h1>
{% for post in posts %}
<p class="date">
Published {{ post.publish }} by {{ post.author }}
</p>
{{ post.body|truncatewords:30|linebreaks }}
{% endfor %}
{% endblock %}
以防万一settings.py:
import os
# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/2.2/howto/deployment/checklist/
# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = 'skqmec#*-cflm(s-%3rj&-1ti&ayk)%$ihk5h$u=0)ym!&+s'
# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True
ALLOWED_HOSTS = []
# Application definition
INSTALLED_APPS = [
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
# created apps
'person',
'accounts',
'shopping_cart',
'blog.apps.BlogConfig',
]
MIDDLEWARE = [
'django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
]
ROOT_URLCONF = 'my_project.urls'
TEMPLATES = [
{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'DIRS': [
os.path.join(BASE_DIR, 'my_project/templates'),
os.path.join(BASE_DIR, 'persons/templates'),
os.path.join(BASE_DIR, 'accounts/templates'),
],
'APP_DIRS': True,
'OPTIONS': {
'context_processors': [
'django.template.context_processors.debug',
'django.template.context_processors.request',
'django.contrib.auth.context_processors.auth',
'django.contrib.messages.context_processors.messages',
],
},
},
]
WSGI_APPLICATION = 'my_project.wsgi.application'
# Database
# https://docs.djangoproject.com/en/2.2/ref/settings/#databases
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.sqlite3',
'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
}
}
# Password validation
# https://docs.djangoproject.com/en/2.2/ref/settings/#auth-password-validators
AUTH_PASSWORD_VALIDATORS = [
{
'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
},
]
# Internationalization
# https://docs.djangoproject.com/en/2.2/topics/i18n/
LANGUAGE_CODE = 'en-us'
TIME_ZONE = 'UTC'
USE_I18N = True
USE_L10N = True
USE_TZ = True
DATE_INPUT_FORMATS = ['%d-%m-%Y']
DATE_FORMAT = ['%d-%m-%Y']
# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/2.2/howto/static-files/
STATIC_URL = '/static/'
MEDIA_ROOT = os.path.join(BASE_DIR, '/my_project/')
MEDIA_URL = '/media/'
LOGIN_REDIRECT_URL = 'home'
LOGOUT_REDIRECT_URL = 'home'
还有我项目目录的截图
请注意,如果我注释掉与详细视图相关的所有内容(url patter, view, c.)并且我只离开列表视图,路径工作正常(显然当单击博客名称 link 时,它不会带我到任何地方。 问题是即使我请求 'local host'/博客地址,程序好像在找博客/'the detail view'
在此先感谢您的帮助
问题是因为在您的 get_absolute_url
中将 字符串 作为 args
传递。只需将其更改为:
class Post(models.Model):
# ...
def get_absolute_url(self):
return reverse(
'blog:post_detail',
args=[
self.publish.year,
self.publish.month,
self.publish.day,
self.slug,
]
)
并且只是为了进一步澄清,正如您所说,当您尝试访问 /blog
(列表视图)时,您会看到此错误 even;那是因为列表视图模板中的 {{ post.get_absolute_url }}
试图 return reverse
反对每个 post,这将导致错误。
这个问题出自'Django 2 by example'一书,之前也被问过很多次了,虽然我都检查了所有的答案还是无法解决问题。
我唯一与本书不同的地方是在 'my_project' 项目(包含其他应用程序)而不是 'mysite' 项目目录中创建 'blog' 应用程序。
我的错误是这样的:
my_project/urls.py:
from django.contrib import admin
from django.urls import path, include
from person import views
from accounts.views import RegisterView # register
urlpatterns = [
path('admin/', admin.site.urls),
path('', views.home_view, name='home'),
path('person/', include('person.urls')),
path('create/', include('person.urls')),
path('accounts/', include('django.contrib.auth.urls')),
path('accounts/register/', RegisterView.as_view(), name='register'),
path('shopping-cart/', include('shopping_cart.urls')),
path('blog/', include('blog.urls', namespace='blog')),
]
我的blog/urls.py:
from django.urls import path
from . import views
app_name = 'blog'
urlpatterns = [
path('', views.post_list, name='post_list'),
path('<int:year>/<int:month>/<int:day>/<slug:post>/', views.post_detail, name='post_detail'),
]
我的models.py:
from django.contrib.auth.models import User
from django.db import models
from django.utils import timezone
from django.urls import reverse
class PublishManager(models.Manager):
def get_queryset(self):
return super(PublishManager, self).get_queryset().filter(status='published')
class Post(models.Model):
STATUS_CHOICES = (
('draft', 'Draft'),
('published', 'Published'),
)
title = models.CharField(max_length=250)
slug = models.SlugField(max_length=250, unique_for_date='publish')
author = models.ForeignKey(User, on_delete=models.CASCADE, related_name='blog_post')
body = models.TextField()
publish = models.DateTimeField(default=timezone.now)
created = models.DateTimeField(auto_now_add=True)
updated = models.DateTimeField(auto_now=True)
status = models.CharField(max_length=10, choices=STATUS_CHOICES, default='draft')
object = models.Manager() # The default manager.
published = PublishManager() # My custom manager
class Meta:
ordering = ('-publish',)
def __str__(self):
return self.title
def get_absolute_url(self):
return reverse(
'blog:post_detail',
args=[
'self.publish.year',
'self.publish.month',
'self.publish.day',
'self.slug',
]
)
我的views.py:
from django.shortcuts import render, get_object_or_404
from .models import Post
def post_list(request):
posts = Post.published.all()
return render(request, 'blog/post/list.html', {'posts': posts})
def post_detail(request, year, month, day, post):
post = get_object_or_404(Post,
slug=post,
status='published',
publish__year=year,
publish__month=month,
publish__day=day)
return render(request, 'blog/post/detail.html', {'post': post})
list.html:
{% extends 'base.html' %}
{% block content %}
<h1>My Blog</h1>
{% for post in posts %}
<h2>
<a href="{{ post.get_absolute_url }}">
{{ post.title }}
</a>
</h2>
<p class="date">
Published {{ post.publish }} by {{ post.author }}
</p>
{{ post.body|truncatewords:30|linebreaks }}
{% endfor %}
{% endblock %}
details.html:
{% extends 'base.html' %}
{% block content %}
<h1>{{ post.title }}</h1>
{% for post in posts %}
<p class="date">
Published {{ post.publish }} by {{ post.author }}
</p>
{{ post.body|truncatewords:30|linebreaks }}
{% endfor %}
{% endblock %}
以防万一settings.py:
import os
# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/2.2/howto/deployment/checklist/
# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = 'skqmec#*-cflm(s-%3rj&-1ti&ayk)%$ihk5h$u=0)ym!&+s'
# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True
ALLOWED_HOSTS = []
# Application definition
INSTALLED_APPS = [
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
# created apps
'person',
'accounts',
'shopping_cart',
'blog.apps.BlogConfig',
]
MIDDLEWARE = [
'django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
]
ROOT_URLCONF = 'my_project.urls'
TEMPLATES = [
{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'DIRS': [
os.path.join(BASE_DIR, 'my_project/templates'),
os.path.join(BASE_DIR, 'persons/templates'),
os.path.join(BASE_DIR, 'accounts/templates'),
],
'APP_DIRS': True,
'OPTIONS': {
'context_processors': [
'django.template.context_processors.debug',
'django.template.context_processors.request',
'django.contrib.auth.context_processors.auth',
'django.contrib.messages.context_processors.messages',
],
},
},
]
WSGI_APPLICATION = 'my_project.wsgi.application'
# Database
# https://docs.djangoproject.com/en/2.2/ref/settings/#databases
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.sqlite3',
'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
}
}
# Password validation
# https://docs.djangoproject.com/en/2.2/ref/settings/#auth-password-validators
AUTH_PASSWORD_VALIDATORS = [
{
'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
},
]
# Internationalization
# https://docs.djangoproject.com/en/2.2/topics/i18n/
LANGUAGE_CODE = 'en-us'
TIME_ZONE = 'UTC'
USE_I18N = True
USE_L10N = True
USE_TZ = True
DATE_INPUT_FORMATS = ['%d-%m-%Y']
DATE_FORMAT = ['%d-%m-%Y']
# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/2.2/howto/static-files/
STATIC_URL = '/static/'
MEDIA_ROOT = os.path.join(BASE_DIR, '/my_project/')
MEDIA_URL = '/media/'
LOGIN_REDIRECT_URL = 'home'
LOGOUT_REDIRECT_URL = 'home'
还有我项目目录的截图
请注意,如果我注释掉与详细视图相关的所有内容(url patter, view, c.)并且我只离开列表视图,路径工作正常(显然当单击博客名称 link 时,它不会带我到任何地方。 问题是即使我请求 'local host'/博客地址,程序好像在找博客/'the detail view'
在此先感谢您的帮助
问题是因为在您的 get_absolute_url
中将 字符串 作为 args
传递。只需将其更改为:
class Post(models.Model):
# ...
def get_absolute_url(self):
return reverse(
'blog:post_detail',
args=[
self.publish.year,
self.publish.month,
self.publish.day,
self.slug,
]
)
并且只是为了进一步澄清,正如您所说,当您尝试访问 /blog
(列表视图)时,您会看到此错误 even;那是因为列表视图模板中的 {{ post.get_absolute_url }}
试图 return reverse
反对每个 post,这将导致错误。