python - 如何更改/添加 Django 的 ListView 的响应 header ？

Question

我正在尝试修改 ListView 的响应 header ，以解决似乎是缓存的问题。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
    [. . . ]

无论哪种情况，都会抛出此AttributeError:

'MapListView" object has no attribute 'object_list'

这显然发生在 MultipleObjectMixin 的 get_context_data() 行上:

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

我应该采取什么不同的做法？如何更改 ListView 的响应 header ？

---

作为引用，这里是 whole get_context_data() definition .

---

为了获得更多引用，这是我的整体观点:

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

在你的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

调用 super().get() 将正确设置 object_list，但它依赖于 get_queryset。我不相信您已经正确设置了查询集(因为您在类定义中动态设置了它)，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)