如何自动填写表单域在Django

Question

我有一个模型表单有四个字段：消息，作者，房间和时间戳。时间戳设置为auto_now，因此不会出现在表单中。作者和房间都是ForeignKey，我希望他们自动填写表单，作者被设置为request.user，并通过url传递给查看的房间：/ add_message/{{room.id}} /'The只有客户填写的字段才是消息。这里的观点，到目前为止，但我不知道如何实现这一点：

@login_required(login_url="/login/") 
def add_message(request, room_id): 
    p = get_object_or_404(Room, pk=room_id) 
    m = Message.objects.all().order_by('-timestamp') 
    form = MessageForm(request.POST or None) 
    if form.is_valid(): 
     cmodel = form.save() 
     cmodel.save() 
    return HttpResponseRedirect(reverse('chat.views.add_message', args=(p.id,))) 

return render_to_response('chatroom.html', {'contact_form': form, 'room':p, 'latest_message_list': m}, context_instance=RequestContext(request)) 

Answer 1

没有测试，但应该工作

forms.py

class MessageForm(forms.ModelForm): 
    def __init__(self, **kwargs): 
     self.room = kwargs.pop('room', None) 
     self.author = kwargs.pop('author', None) 
     super(MessageForm, self).__init__(**kwargs) 

    def save(self, commit=True): 
     obj = super(MessageForm, self).save(commit=False) 
     obj.room = self.room 
     obj.author = self.author 
     if commit: 
      obj.save() 
     return obj 

    class Meta: 
     model = Message 

views.py

@login_required(login_url="/login/") 
def add_message(request, room_id): 
    room = get_object_or_404(Room, pk=room_id) 
    form = MessageForm(room=room, author=request.user, data=request.POST) 
    if form.is_valid(): 
     form.save() 
    return HttpResponseRedirect(reverse('chat.views.add_message', args=(p.id,)))