Django Rest框架 - 为什么serializer.data为空

Question

我正在使用必须使用django rest框架序列化程序类作为窗体的窗体中工作。让我给你看一些代码，以便你更好地理解。

在我的模型我有一个返回动态序列化类的属性：

@property 
def content_serializer_class(self): 
    backend_module = self.backend_module 

    if backend_module == "youtube": 
     return YoutubeSerializer 
    elif backend_module == "googleplay": 
     return GoogleplaySerializer 
    elif backend_module == "bellone": 
     return BelloneSerializer 
    elif backend_module == "rogersvod": 
     return RogersvodSerializer 

然后我的观点：

class ContentCreateView(LoginRequiredMixin, PermissionRequiredMixin, APIView): 
    renderer_classes = [TemplateHTMLRenderer] 
    template_name = 'delivery/content_form.html' 
    permission_required = 'delivery.change_delivery' 

    def get(self, request, delivery_id): 
     delivery = get_object_or_404(Delivery, pk=delivery_id,owner=self.request.user) 
     if not delivery.can_change: 
      raise Http404 

     return Response({'serializer': delivery.content_serializer_class, 'delivery': delivery}) 

    def post(self, request, delivery_id): 
     delivery = get_object_or_404(Delivery, pk=delivery_id,owner=self.request.user) 
     if not delivery.can_change: 
      raise Http404 

     serializer = delivery.content_serializer_class(data=request.data) 

     if not serializer.is_valid(): 
      return Response({'serializer': delivery.content_serializer_class, 'delivery': delivery}) 

     print 'serializer', serializer.data 

     nextUrl = self.request.POST.get("next", "") 
     if nextUrl: 
      return redirect(nextUrl) 
     else: 
      return redirect(reverse('delivery:delivery-detail', args=[delivery_id])) 

而且我的模板：

<form role="form" id="form-content" class="form-horizontal" method="post"> 
    {% csrf_token %} 
    <input type="hidden" id="id-next" name="next" value="" /> 
    {% render_form serializer template_pack='rest_framework/horizontal' %}    
</form> 

我跟随this guide。

问题是，当我尝试从序列化程序（serializer.data）得到json是空的。验证工作正常，表单呈现正常，但json数据为空。

我错过了什么？谢谢你的帮助。

Answer 1

由于格式通常

mymodel = MyModel.objects.get(id=model_id) 
    serializer = MyModelSerializer(mymodel,many=False) # for single object 

是等一流水平它必须是：

def content_serializer_class(self): 
    backend_module = self.backend_module 

    if backend_module == "youtube": 
     return YoutubeSerializer(self,many=False) 

    elif backend_module == "googleplay": 
     return GoogleplaySerializer(self,many=False) 

    elif backend_module == "bellone": 
     return BelloneSerializer(self,many=False) 

elif backend_module == "rogersvod": 
    return RogersvodSerializer(self,many=False)