Question

我正在尝试使用Geodjango中的用户位置创建Google地图API 3标记。

我在渲染Google地图和标记时遇到Internal Server Error 500。在CMD控制台上，我得到TypeError: 'GeoQuerySet' object is not callable。

您能否提出解决方案并解释异常原因？

views.py

class MyView(View):
    def get(self, request):
        resp = UserList.objects.all().values('nickname', 'last_location')
        print (resp)
        return JsonResponse(request, resp, safe=False)

urls.py

from django.conf.urls import include, url
from django.contrib import admin
from mymap_app import views as map_views

admin.autodiscover()
urlpatterns = [
    url(r'^admin/', admin.site.urls),
    url(r'^my_endpoint/$',map_views.MyView.as_view(),name='user_list'),
    url(r'^$',map_views.IndexView.as_view(), name='index'),

    ]

回溯：

Traceback (most recent call last):
  File "C:\Python35-32\lib\site-packages\django\core\handlers\exception.py", lin
e 41, in inner
    response = get_response(request)
  File "C:\Python35-32\lib\site-packages\django\core\handlers\base.py", line 187
, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "C:\Python35-32\lib\site-packages\django\core\handlers\base.py", line 185
, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "C:\Python35-32\lib\site-packages\django\views\generic\base.py", line 68,
 in view
    return self.dispatch(request, *args, **kwargs)
  File "C:\Python35-32\lib\site-packages\django\views\generic\base.py", line 88,
 in dispatch
    return handler(request, *args, **kwargs)
  File "C:\Users\Kaleab\Desktop\WebMap\AAmap_Project\mymap_app\views.py", line 2
1, in get
    return JsonResponse(request, resp, safe=False)
  File "C:\Python35-32\lib\site-packages\django\http\response.py", line 530, in
__init__
    data = json.dumps(data, cls=encoder, **json_dumps_params)
  File "C:\Python35-32\lib\json\__init__.py", line 237, in dumps
    **kw).encode(obj)
TypeError: 'GeoQuerySet' object is not callable
[05/Sep/2017 22:36:45] "GET /my_endpoint/ HTTP/1.1" 500 18865

Answer 1

看看这个：data = json.dumps(data, cls=encoder, **json_dumps_params)。

JsonResponse正在尝试序列化您传递的参数，但是GeoQuerySet不能通过函数调用进行序列化，因此会引发TypeError。请参阅以下文档： https://docs.python.org/2/library/json.html

如果skipkeys为true（默认值：False），则字典键不是a 基本类型（str，unicode，int，long，float，bool，None）将是跳过而不是引发TypeError。

为了解决这个问题，你可以改为：

return HttpResponse(
    json.dumps(response, skipkeys=True), content_type="application/json"
)

也可以将GeoQuerySet格式化为python字典，然后将其传递给JsonResponse。

Answer 2

对views.py的以下更改解决了Geoqueryset object not callable错误。

class MyView(View):
    def get(self, request):
        response = UserList.objects.all().values('nickname','last_location')
        print(response)
        return JsonResponse({'response':list(response)})

TypeError：'GeoQuerySet'对象不可调用

2 个答案: