Python 单向删除Django通道线程
我试图让用户能够从收件箱中删除另一个用户的线程 我遵循了Django文档Python 单向删除Django通道线程,python,django,django-views,django-channels,Python,Django,Django Views,Django Channels,我试图让用户能够从收件箱中删除另一个用户的线程 我遵循了Django文档DeleteView,尽管这可能是完全错误的 views.py class InboxView(LoginRequiredMixin, ListView): template_name = 'chat/inbox.html' context_object_name = 'threads' def get_queryset(self): return Thread.objects.by_
DeleteView
,尽管这可能是完全错误的
views.py
class InboxView(LoginRequiredMixin, ListView):
template_name = 'chat/inbox.html'
context_object_name = 'threads'
def get_queryset(self):
return Thread.objects.by_user(self.request.user).order_by('-timestamp')
# by_user(self.request.user)
class ThreadView(LoginRequiredMixin, FormMixin, DetailView):
template_name = 'chat/thread.html'
form_class = ComposeForm
success_url = '#'
def get_queryset(self):
return Thread.objects.by_user(self.request.user)
def get_object(self):
other_username = self.kwargs.get("username")
obj, created = Thread.objects.get_or_new(self.request.user, other_username)
if obj == None:
raise Http404
return obj
def get_context_data(self, **kwargs):
context = super().get_context_data(**kwargs)
context['form'] = self.get_form()
return context
def post(self, request, *args, **kwargs):
if not request.user.is_authenticated:
return HttpResponseForbidden()
self.object = self.get_object()
form = self.get_form()
if form.is_valid():
return self.form_valid(form)
else:
return self.form_invalid(form)
def form_valid(self, form):
thread = self.get_object()
user = self.request.user
message = form.cleaned_data.get("message")
ChatMessage.objects.create(user=user, thread=thread, message=message)
return super().form_valid(form)
class ThreadDeleteView(DeleteView):
model = Thread
success_url = reverse_lazy('inbox')
models.py
class ThreadManager(models.Manager):
def by_user(self, user):
qlookup = Q(first=user) | Q(second=user)
qlookup2 = Q(first=user) & Q(second=user)
qs = self.get_queryset().filter(qlookup).exclude(qlookup2).distinct()
return qs
# method to grab the thread for the 2 users
def get_or_new(self, user, other_username): # get_or_create
username = user.username
if username == other_username:
return None
# looks based off of either username
qlookup1 = Q(first__username=username) & Q(second__username=other_username)
qlookup2 = Q(first__username=other_username) & Q(second__username=username)
qs = self.get_queryset().filter(qlookup1 | qlookup2).distinct()
if qs.count() == 1:
return qs.first(), False
elif qs.count() > 1:
return qs.order_by('timestamp').first(), False
else:
Klass = user.__class__
user2 = Klass.objects.get(username=other_username)
if user != user2:
obj = self.model(
first=user,
second=user2
)
obj.save()
return obj, True
return None, False
class Thread(models.Model):
first = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name='chat_thread_first')
second = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name='chat_thread_second')
updated = models.DateTimeField(auto_now=True)
timestamp = models.DateTimeField(auto_now_add=True)
objects = ThreadManager()
def __str__(self):
return f'{self.id}'
@property
def room_group_name(self):
return f'chat_{self.id}'
def broadcast(self, msg=None):
if msg is not None:
broadcast_msg_to_chat(msg, group_name=self.room_group_name, user='admin')
return True
return False
带有删除按钮的html线程页面
<!-- Delete Thread -->
<form action="{% url 'chat:thread_delete' user.username %}" method='post'> {% csrf_token %}
<button type='submit' class='btn btn-light'>
<i class="fas fa-trash-alt" style="color:royalblue"></i>
</button>
</form>
这是由views.py
行引起的
self.object = self.get_object()
obj, created = Thread.objects.get_or_new(self.request.user, other_username)
我认为这里的问题是,您的
get\u或\u new()
方法中有一个return语句没有返回元组:
if username == other_username:
return None
这会导致视图崩溃,因为它希望将一个元组解压为两个变量。返回元组应解决以下问题:
if username == other_username:
return None, None
你试过打印“其他用户”吗?是的,它打印登录用户谢谢,我明白你的意思。在我更改方法以返回元组并调用
DeleteView
之后,url从ThreadView
urlhttp://127.0.0.1:8000/messages/newuser3
其中newuser3
是DeleteView
urlhttp://127.0.0.1:8000/messages/trilla/delete/
其中trilla
是我或登录用户。然后我得到一个404未找到
。发生此错误是因为DeleveView
url配置不正确吗?我已将DeleveView
url更改为{%url'聊天:线程\u删除'thread.second%}
它不会抛出任何错误,但仍然保持线程的灵活性,并且不会重定向到收件箱您是否能够发布整个视图.py
?似乎当obj
为None时,视图将重定向到一个无法查找的URL。DeleteView
表单似乎指向正确的URL,但它在请求之后仍停留在。/username/delete/
URL上。POST
确定问题是,当当前用户尝试删除自己的线程时,然后,username==other\u username
为True
,我们返回None,None
。如果obj==None:raisehttp404,则会导致404from。
if username == other_username:
return None
if username == other_username:
return None, None