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Question

我在编写代码时遇到了同样的错误。

我开始使用 YouTube 上的视频教程制作这个项目。我认为问题出在 URLConf 上，但我自己找不到这个问题。

本质上问题是，当我访问该网站并按某个按钮时，会出现此错误并且找不到此页面，为什么？

在我的

urls.py

中，肯定会有一个错误。

from django.urls import path
from . import views



urlpatterns = [


    path('login/', views.loginPage, name="login"),
    path('logout/', views.logoutUser, name="logout"),
    path('register/', views.registerPage, name="register"),


    path('', views.home, name='home'),
    path('room/<str:pk>/', views.room, name="room"),
    path('profile/<str:pk>',views.userProfile,name="user-profile"),


    path('create-room/', views.createRoom, name="create-room"),
    path('update-room/<str:pk>/', views.updateRoom, name="update-room"),
    path('delete-room/<str:pk>/', views.deleteRoom, name="delete-room"),
    path('delete-message/<str:pk>/', views.deleteMessage, name="delete-message"),

]

我的

views.py

from django.shortcuts import render, redirect
from django.db.models import Q
from django.http import HttpResponse
from django.contrib.auth.decorators import login_required
from django.contrib import messages
from django.contrib.auth.models import User
from django.contrib.auth import authenticate,login,logout
from .models import Room, Topic, Message
from django.contrib.auth.forms import UserCreationForm
from .forms import RoomForm



#rooms = [
  #  {'id': 1, 'name': 'Lets learn python!' },
  #  {'id': 2, 'name': 'Design with me' },
 #   {'id': 3, 'name': 'Frontend developers' },
#]


def loginPage(request):

    page = 'login'
    if request.user.is_authenticated:
        return redirect('home')


    if request.method == 'POST':
        username = request.POST.get('username').lower()
        password = request.POST.get('password')

        try:
            user = User.objects.get(username=username)
        except:
            messages.error(request,'User does not exist')

        user = authenticate(request, username=username, password=password)

        if user is not None:
            login(request, user)
            return redirect('home')
        else:
            messages.error(request,'Username OR password does not exit')


    context = {'page': page}
    return render(request, 'base/login_register.html', context)

def logoutUser(request):
    logout(request)
    return redirect('home')


def registerPage(request):

    form = UserCreationForm()

    if request.method == 'POST':
        form = UserCreationForm(request.POST)
        if form.is_valid():
            user = form.save(commit=False)
            user.username = user.username.lower()
            user.save()
            login(request, user)
            return redirect('home')
        else:
            messages.error(request,'An error occurred during registration')


    return render(request, 'base/login_register.html',{'form':form})


def home(request):
    q=request.GET.get('q') if request.GET.get('q')!= None else ''

    rooms = Room.objects.filter(
        Q(topic__name__icontains=q) |
        Q(name__icontains=q) |
        Q(description__icontains=q)
    )

    topics = Topic.objects.all()
    room_count = rooms.count()
    room_messages = Message.objects.all()


    context = {'rooms': rooms, 'topics' : topics,
               'room_count' : room_count,'room_messages': room_messages}

    return render(request, 'base/home.html', context)

def room(request,pk):

    room = Room.objects.get(id=pk)
    room_messages = room.message_set.all()
    participants = room.participants.all(
    )
    if request.method == 'POST':
        message = Message.objects.create(
            user = request.user,
            room=room,
            body=request.POST.get('body')
        )
        room.participants.add(request.user)
        return redirect('room',pk=room.id)

    context = {'room': room,'room_messages':room_messages,
               'participants': participants}
    return render(request, 'base/room.html', context)




def userProfile(request, pk):
    user = User.objects.get(id=pk)
    context={'user':user}
    return render(request,'base/room.html',context)

@login_required(login_url='login')
def createRoom(requset):
    form = RoomForm
    if requset.method == 'POST':
        form = RoomForm(requset.POST)
        if form.is_valid():
            form.save()
            return redirect('home')

    context = {'form': form}
    return render(requset, 'base/room_form.html',context)

@login_required(login_url='login')
def updateRoom(request,pk):
    room = Room.objects.get(id=pk)
    form = RoomForm(instance=room)

    if request.user != room.host:
        return HttpResponse('Your are not allowed here!!!')

    if request.method == 'POST':
        form = RoomForm(request.POST, instance=room)
        if form.is_valid():
            form.save()
            return redirect('home')

    context = {'form': form}
    return render(request,'base/room_form.html', context)

@login_required(login_url='login')
def deleteRoom(request, pk):
    room = Room.objects.get(id=pk)

    if request.user != room.host:
        return HttpResponse('Your are not allowed here!!!')

    if request.method == 'POST':
        room.delete()
        return redirect('home')
    return render(request,'base/delete.html',{'obj': room})


@login_required(login_url='login')
def deleteMessage(request, pk):
    message = Room.objects.get(id=pk)

    if request.user != message.host:
        return HttpResponse('Your are not allowed here!!!')

    if request.method == 'POST':
        message.delete()
        return redirect('home')
    return render(request,'base/delete.html',{'obj': message})

如果这些信息不足以解决此错误，我可以提供我的其他文件的代码。

Answer 1

删除消息视图的 URL 名称是“delete-message”。您还需要传递 id，以便 django 知道要删除哪一个。

{% url 'delete-message' {{message.id}} %}"

来源：https://docs.djangoproject.com/en/5.0/topics/http/urls/#reverse-resolution-of-urls