我正在尝试制作一个类似于博客文章显示Spikeball游戏统计信息的应用程序。 Django并没有选择我的models.py中的get absolute url方法。
在models.py中，我尝试反转到详细游戏形式的绝对URL，但django没有选择它，这意味着我定义了函数，但仍然收到错误提示，但没有。
这是我的模型。py：
from django.db import models
from django.utils import timezone
from django.contrib.auth.models import User
from django.urls import reverse
class Game(models.Model):
game = models.CharField(max_length=100, blank=True,null=True)
score = models.CharField(max_length=10, blank=True,null=True)
winner = models.CharField(max_length=20, default=None, blank=True,null=True)
date_played = models.DateField(default=timezone.now)
creator = models.ForeignKey(User, on_delete=models.CASCADE)
player1 = models.CharField(max_length=20, blank=True,null=True)
player2 = models.CharField(max_length=20, blank=True,null=True)
player3 = models.CharField(max_length=20, blank=True,null=True)
player4 = models.CharField(max_length=20, blank=True,null=True)
def __str__(self):
return self.game
def get_absolute_url(self):
return reverse('spike_stats-detail', kwargs={'pk': self.pk})
这是我的views.py：
from django.shortcuts import render
from django.views.generic import (
ListView,
DetailView,
CreateView
)
from django.contrib.auth.mixins import LoginRequiredMixin
from .models import Game
def home(request):
context = {
'games': Game.objects.all()
}
return render(request, 'spike_stats/home.html', context)
class GameListView(ListView):
model = Game
template_name = 'spike_stats/home.html' # <app>/<model>_<viewtype>.html
context_object_name = 'games'
ordering = ['-date_played'] # minus sign orders from newest to oldest
class GameDetailView(DetailView):
model = Game
class GameCreateView(LoginRequiredMixin, CreateView):
model = Game
fields = ['game', 'score', 'winner',
'player1', 'player2', 'player3', 'player4']
def form_valid(self, form):
game = form.save(commit=False)
game.creator = self.request.user
game.save()
return super().form_valid(game)
def about(request):
return render(request, 'spike_stats/about.html',
{'game': 'Game 1 about'})
urls.py：
from django.urls import path
from .views import (
GameListView,
GameDetailView,
GameCreateView
)
from . import views
urlpatterns = [
path('', GameListView.as_view(), name='spike_stats-home'),
path('game/<int:pk>/', GameDetailView.as_view(), name='spike_stats-detail'),
path('game/new/', GameCreateView.as_view(), name='spike_stats-create'),
path('about/', views.about, name='spike_stats-about'),
]
game_detail.html表单：
{% extends "spike_stats/base.html" %}
{% block content %}
<article class="media content-section">
<img class="rounded-circle article-img" src="{{ game.creator.profile.image.url }}" >
<div class="media-body">
<div class="article-metadata">
<a class="mr-2" href="#">{{ object.author }}</a>
<small class="text-muted">{{ object.date_played|date:"F d, Y" }}</small>
</div>
<h2 class="article-title">{{ object.game }}</h2>
<p class="article-content">{{ object.score }}</p>
<p class="article-content">{{ object.winner }}</p>
</div>
</article>
{% endblock content %}
和我得到的追溯：
Environment:
Request Method: POST
Request URL: http://localhost:8000/game/new/
Django Version: 2.1.5
Python Version: 3.6.5
Installed Applications:
['spike_stats.apps.SpikeStatsConfig',
'users.apps.UsersConfig',
'crispy_forms',
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles']
Installed 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']
Traceback:
File "/anaconda3/lib/python3.6/site-packages/django/views/generic/edit.py" in get_success_url
116. url = self.object.get_absolute_url()
During handling of the above exception ('NoneType' object has no attribute 'get_absolute_url'), another exception occurred:
File "/anaconda3/lib/python3.6/site-packages/django/core/handlers/exception.py" in inner
34. response = get_response(request)
File "/anaconda3/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
126. response = self.process_exception_by_middleware(e, request)
File "/anaconda3/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
124. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/anaconda3/lib/python3.6/site-packages/django/views/generic/base.py" in view
68. return self.dispatch(request, *args, **kwargs)
File "/anaconda3/lib/python3.6/site-packages/django/contrib/auth/mixins.py" in dispatch
52. return super().dispatch(request, *args, **kwargs)
File "/anaconda3/lib/python3.6/site-packages/django/views/generic/base.py" in dispatch
88. return handler(request, *args, **kwargs)
File "/anaconda3/lib/python3.6/site-packages/django/views/generic/edit.py" in post
172. return super().post(request, *args, **kwargs)
File "/anaconda3/lib/python3.6/site-packages/django/views/generic/edit.py" in post
142. return self.form_valid(form)
File "/Users/z_goodman/Spike_Board/spike_stats/views.py" in form_valid
41. return super().form_valid(game)
File "/anaconda3/lib/python3.6/site-packages/django/views/generic/edit.py" in form_valid
126. return super().form_valid(form)
File "/anaconda3/lib/python3.6/site-packages/django/views/generic/edit.py" in form_valid
57. return HttpResponseRedirect(self.get_success_url())
File "/anaconda3/lib/python3.6/site-packages/django/views/generic/edit.py" in get_success_url
119. "No URL to redirect to. Either provide a url or define"
Exception Type: ImproperlyConfigured at /game/new/
Exception Value: No URL to redirect to. Either provide a url or define a get_absolute_url method on the Model.
它应该仅重定向到详细的游戏表单。抱歉，我是Python和Stack Overflow的新手。
答案 0 :(得分：1)
您的问题在以下一行：return super().form_valid(game)-您正在将game传递到您的超类中，而不是最初打算的form。
您需要将视图更改为如下形式：
class GameCreateView(LoginRequiredMixin, CreateView):
model = Game
fields = ['game', 'score', 'winner',
'player1', 'player2', 'player3', 'player4']
def form_valid(self, form):
game = form.save(commit=False)
game.creator = self.request.user
game.save()
return super().form_valid(form)