我知道有很多类似的帖子，但尝试过：
找不到页面(404(请求方法：GET
Django-找不到页面(404(请求方法：GET方法
找不到页面(404(请求方法：GET请求URL:http://127.0.0.1:8000/about
我仍然不能解决这个问题。这是cs50w的一个练习样本。我得到这个错误：
Page not found (404)
Request Method: GET
Request URL: http://127.0.0.1:8000/
Using the URLconf defined in airline.urls, Django tried these URL patterns, in this order:
admin/
flights/
users/
The empty path didn’t match any of these.
我有一个主要的网址.py:
from django.contrib import admin
from django.urls import include, path
urlpatterns = [
path('admin/', admin.site.urls),
path("flights/", include("flights.urls")),
path("users/", include("users.urls"))
]
urls.py在飞行中：
from django.urls import path
from . import views
urlpatterns = [
path("", views.index, name="index"),
path("<int:flight_id>", views.flight, name="flight"),
path("<int:flight_id>/book", views.book, name="book")
]
在用户中，url.py:
from django.urls import path
from . import views
urlpatterns = [
path("", views.index, name="index"),
path("login", views.login_view, name="login"),
path("logout", views.logout_view, name="logout")
]
我的设置.py:
"""
Django settings for airline project.
Generated by 'django-admin startproject' using Django 3.0.2.
For more information on this file, see
https://docs.djangoproject.com/en/3.0/topics/settings/
For the full list of settings and their values, see
https://docs.djangoproject.com/en/3.0/ref/settings/
"""
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/3.0/howto/deployment/checklist/
# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = 'rf(az43up-jxv^%y9_^z!*bkl=vh-7nz*)!5olp!^&675i@k(x'
# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True
ALLOWED_HOSTS = []
# Application definition
INSTALLED_APPS = [
'flights',
'users',
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
]
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 = 'airline.urls'
TEMPLATES = [
{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'DIRS': [],
'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 = 'airline.wsgi.application'
# Database
# https://docs.djangoproject.com/en/3.0/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/3.0/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/3.0/topics/i18n/
LANGUAGE_CODE = 'en-us'
TIME_ZONE = 'UTC'
USE_I18N = True
USE_L10N = True
USE_TZ = True
DEFAULT_AUTO_FIELD = 'django.db.models.AutoField'
# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/3.0/howto/static-files/
STATIC_URL = '/static/'
我在飞行中的观点：
from django import forms
from django.http import HttpResponseBadRequest, HttpResponseRedirect, Http404
from django.shortcuts import render
from django.urls import reverse
from .models import Flight, Passenger
# Create your views here.
def index(request):
return render(request, "flights/index.html", {
"flights": Flight.objects.all()
})
def flight(request, flight_id):
try:
flight = Flight.objects.get(id=flight_id)
except Flight.DoesNotExist:
raise Http404("Flight not found.")
return render(request, "flights/flight.html", {
"flight": flight,
"passengers": flight.passengers.all(),
"non_passengers": Passenger.objects.exclude(flights=flight).all()
})
def book(request, flight_id):
if request.method == "POST":
try:
passenger = Passenger.objects.get(pk=int(request.POST["passenger"]))
flight = Flight.objects.get(pk=flight_id)
except KeyError:
return HttpResponseBadRequest("Bad Request: no flight chosen")
except Flight.DoesNotExist:
return HttpResponseBadRequest("Bad Request: flight does not exist")
except Passenger.DoesNotExist:
return HttpResponseBadRequest("Bad Request: passenger does not exist")
passenger.flights.add(flight)
return HttpResponseRedirect(reverse("flight", args=(flight_id,)))
而我在用户中的观点.py是：
from django.contrib.auth import authenticate, login, logout
from django.http import HttpResponse, HttpResponseRedirect
from django.shortcuts import render
from django.urls import reverse
# Create your views here.
def index(request):
if not request.user.is_authenticated:
return HttpResponseRedirect(reverse("login"))
return render(request, "users/user.html")
def login_view(request):
if request.method == "POST":
username = request.POST["username"]
password = request.POST["password"]
user = authenticate(request, username=username, password=password)
if user is not None:
login(request, user)
return HttpResponseRedirect(reverse("index"))
else:
return render(request, "users/login.html", {
"message": "Invalid credentials."
})
else:
return render(request, "users/login.html")
def logout_view(request):
logout(request)
return render(request, "users/login.html", {
"message": "Logged out."
})
错误非常明显：
空路径与其中任何一个都不匹配。
在主urls.py中，您没有空路径的视图：
# bad
urlpatterns = [
path('admin/', admin.site.urls),
path("flights/", include("flights.urls")),
path("users/", include("users.urls"))
]
要将视图设置为空路径，您需要以下内容吗：
# good
from django.urls import include, path
from apps.main import views as main_views
urlpatterns = [
path('', main_views.homepage), # <--- here your home page view
path('admin/', admin.site.urls),
path("flights/", include("flights.urls")),
path("users/", include("users.urls"))
]
这就是当您访问主页http://127.0.0.1:8000/时，会引发404未找到错误的原因。