从 get_context_data 传递上下文以获取

Question

我曾经在get_context_data 中有book_a_room_form = BookARoomForm()，但后来我将其修改为book_a_room_form = BookARoomForm(initial={'arrival_date': request.session['arrival_date']}) 并将其放入get（请参阅将其移至gethere 的原因）。 get_context_data 和 get 单独工作。但我不能让他们一起工作。我已经阅读了数十篇关于这个问题的帖子，查看了我的回溯，并收到了各种不同的错误消息。我现在只是在讨论这个问题。

  def get_context_data(self, *args, **kwargs):
           context = super(HotelDetailSlugView, self).get_context_data(*args, **kwargs)
           cart_obj, new_obj = Cart.objects.new_or_get(self.request)
          

        context['hotel_extra_photos'] = AmericanHotelPhoto.objects.all().filter(title=AmericanHotel.objects.all().filter(slug=self.kwargs.get('slug'))[0].id)
        context['room_type'] = RoomType.objects.all().filter(title=AmericanHotel.objects.all().filter(slug=self.kwargs.get('slug'))[0].id)

          

        return context
    def get(self, request, *args, **kwargs):
       # This code is executed each time a GET request is coming on this view
       # It's is the best place where a form can be instantiate

        book_a_room_form  = BookARoomForm(initial={'arrival_date': request.session['arrival_date']})
        
        
        return render(request, self.template_name, {'book_a_room_form': book_a_room_form,
                                                     })

Answer 1

你应该在 get 中调用上下文

def get(self, request, *args, **kwargs):

       # This code is executed each time a GET request is coming on this view
       # It's is the best place where a form can be instantiate
    
        book_a_room_form  = BookARoomForm(initial={'arrival_date': request.session['arrival_date']})
        
        context = self.get_context_data( *args, **kwargs)
        context['book_a_room_form'] = book_a_room_form
        return render(request, self.template_name, context=context)
                            

Answer 2

感谢 Mohamed Beltagy 的指导。

 def get(self, request, *args, **kwargs):
       # This code is executed each time a GET request is coming on this view
       # It's is the best place where a form can be instantiate

      

        book_a_room_form  = BookARoomForm(initial={'arrival_date': request.session['arrival_date']})
        

        # get_context_data(**kwargs) - ¶
        # Returns context data for displaying the object.
        # The base implementation of this method requires that the self.object attribute be set by the view (even if None). 
        # Be sure to do this if you are using this mixin without one of the built-in views that does so.
        self.object = self.get_object() # assign the object to the view

        context = self.get_context_data( *args, **kwargs)
        context['book_a_room_form'] = book_a_room_form
        return render(request, self.template_name, context=context)