Question

我试图从乘客路线的ManyToMany关系中获得乘坐（一）。

以下是模型

class Route(models.Model):
    """
   Route model for Retrive a Route M FROM GOOGLE API
    """
    user = models.ForeignKey(User, related_name='route')
    car = models.ForeignKey(Car, related_name='car', null = True, default= None)
    status = models.BooleanField(default = True)
    on_ride = models.BooleanField(default = False)

class Ride(models.Model):
    """
    Ride model for manage the optimized Route
    """
    seats_available = models.PositiveSmallIntegerField(default = 0)
    d_route = models.ForeignKey(Route, related_name= 'd_route')
    p_route =  models.ManyToManyField(Route, related_name= 'p_route',blank = True)

这是我的观点，如果我发送了一个d_route（驾驶员路线）ID我可以检索Ride但是如果我尝试使用p_route（乘客路线），则服务器返回Ride匹配查询不存在。

这是视图

  class RideOrRoute(APIView):
    # authentication_classes = (TokenAuthentication,)
    permission_classes = ()  # (IsAuthenticated,)

    def get(self, request, route_id):

        route = Route.objects.get(id = route_id)

        try:
            ride= Ride.objects.get(d_route = route)
            serialized_data = {'id': ride.id ,'geocoded_waypoints': json.loads(ride.geocoded_waypoints), 'routes': json.loads(ride.routes) }
            return Response(serialized_data, status= status.HTTP_200_OK)
        except:
            try:
                ride = Ride.objects.get(p_route = route.id)
                serialized_data = {'id': ride.id ,'geocodedwaypoints': json.loads(ride.geocoded_waypoints), 'routes': json.loads(ride.routes) }
                return Response(serialized_data, status= status.HTTP_200_OK)
            except:
                serialized_data= {'id': route.id ,'geocoded_waypoints': json.loads(route.geocoded_waypoints), 'routes': json.loads(route.routes) } #json.loads(request_data.read()) })
        return Response(serialized_data, status=status.HTTP_200_OK)

请注意，如果驾驶员没有乘车但我只检索路线信息

Answer 1

我认为您的代码中存在错误。尝试更改

ride = Ride.objects.get(p_route = route.id)

到

ride = Ride.objects.get(p_route = route)

从DataBase获取GET只是一件事

1 个答案: