Question

我正在尝试修改ListView的响应标头，以解决看似缓存的问题。这是我正在尝试的：

def get(self, request, *args, **kwargs):
    context = super(MapListView, self.get_context_data(*args, **kwargs)  # Errors here
    response = super(MapListView, self).render_to_response(context, **kwargs)
    response.headers["Cache-Control"] = "no-cache, no-store, must-revalidate"
    response.headers["Pragma"] = "no-cache"
    response.headers["Expires"] = "0"
    return response

我也尝试过：

def get(self, request, *args, **kwargs):
    context = self.get_context_data()  # Errors here
    [. . . ]

在任何一种情况下，都抛出AttributeError：

'MapListView" object has no attribute 'object_list'

这显然发生在get_context_data()来自MultipleObjectMixin的这一行：

queryset = kwargs.pop('object_list', self.object_list)

我应该做些什么？如何更改ListView的回复标题？

供参考，这里是whole get_context_data() definition。

更多参考资料，这是我的全部观点：

class MapContactClientListView(ListView):
    model = Map # Note: This isn't the real name, so it's not a problem with this.
    cursor = connections["default"].cursor()
    cursor.execute("""SELECT map.*
                      FROM map
                      INNER JOIN profile
                          ON (map.profile_id = profile.id)
                      ORDER BY profile.name""")
    queryset = dictfetchall(cursor)
    paginate_by = 20
    template_name = 'onboardingWebApp/map_list.html'

    def get(self, request, *args, **kwargs):
        context = super(MapListView, self.get_context_data(*args, **kwargs)
        response = super(MapListView, self).render_to_response(context, **kwargs)
        response.headers["Cache-Control"] = "no-cache, no-store, must-revalidate"
        response.headers["Pragma"] = "no-cache"
        response.headers["Expires"] = "0"
        return response

Answer 1

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

中

  def get(self, request, *args, **kwargs):
    response = super(MapListView, self).get(request,*args,**kwargs)
    response.headers["Cache-Control"] = "no-cache, no-store, must-revalidate"
    response.headers["Pragma"] = "no-cache"
    response.headers["Expires"] = "0"
    return response

对super（）。get（）的调用将正确设置object_list，但它依赖于get_queryset。我不相信你已经正确设置了你的查询集（因为你在类定义中动态设置它），所以我将其更改为：

 def get_queryset(self):
     cursor = connections["default"].cursor()
     cursor.execute("""SELECT map.*
                  FROM map
                  INNER JOIN profile
                      ON (map.profile_id = profile.id)
                  ORDER BY profile.name""")
    return dictfetchall(cursor)

如何更改/添加Django的ListView响应头？

1 个答案: