Python DoesNotExist:[模型]匹配查询在id（ObjectId）处不存在

我正在尝试使用ObjectId查询唯一的文档。但是出现了错误：

DoesNotExist:路由匹配查询不存在

当将其作为请求传递给我的视图时，它会以ObjectId typeform打印出相应的ObjectId。因此，行

route\u test=route.objects.get（id=\u id）

应该没有问题。 我有以下代码：

视图.py

def update(request):

    if request.method == "POST":

        _id = request.POST.get('_id',ObjectId())
        print(_id)
        route_id = request.POST.get('route_id','')
        geometry = request.POST.get('geometry', '')
        properties = request.POST.get('properties','')

        #r = Route.objects.get(route_id='LTFRB_PUJ2616') --> I cannot use this
                                      #because it has 5 instances (Not Unique)
        #print (r["id"],r["properties"]) 

        test = Route.objects.get(id = ObjectId('587c4c3b203ada19e8e0ecf6'))
        print (test["id"], test["properties"])

        try:
            route_test = Route.objects.get(id=_id)
            print(route_test)
            Route.objects.get(id=_id).update(set__geometry=geometry, set__properties=properties)
            return HttpResponse("Success!")

        except:
            return HttpResponse("Error!")

from __future__ import unicode_literals

from mongoengine import *

class Route(Document):
    type = StringField(required=True)
    route_id = StringField(required=True)
    geometry = LineStringField()
    properties = DictField()

    meta = {'collection':'routes'}

ajax

 var finishBtn = L.easyButton({
     id:'finish',
     states: [{
              icon:"fa fa-check",
              onClick: function(btn){
                  selectedFeature.editing.disable();
                  layer.closePopup();
                  var editedFeature = selectedFeature.toGeoJSON();
                  alert("Updating:" + editedFeature.route_id);

                  $.ajax({
                     url: "/update/",
                     data: {id:editedFeature.id,
                            route_id: JSON.stringify(editedFeature.route_id),
                            geometry: JSON.stringify(editedFeature.geometry),
                            properties: JSON.stringify(editedFeature.properties)
                         }, 
                     type: 'POST'     
            });
 }

model.py

def update(request):

    if request.method == "POST":

        _id = request.POST.get('_id',ObjectId())
        print(_id)
        route_id = request.POST.get('route_id','')
        geometry = request.POST.get('geometry', '')
        properties = request.POST.get('properties','')

        #r = Route.objects.get(route_id='LTFRB_PUJ2616') --> I cannot use this
                                      #because it has 5 instances (Not Unique)
        #print (r["id"],r["properties"]) 

        test = Route.objects.get(id = ObjectId('587c4c3b203ada19e8e0ecf6'))
        print (test["id"], test["properties"])

        try:
            route_test = Route.objects.get(id=_id)
            print(route_test)
            Route.objects.get(id=_id).update(set__geometry=geometry, set__properties=properties)
            return HttpResponse("Success!")

        except:
            return HttpResponse("Error!")

from __future__ import unicode_literals

from mongoengine import *

class Route(Document):
    type = StringField(required=True)
    route_id = StringField(required=True)
    geometry = LineStringField()
    properties = DictField()

    meta = {'collection':'routes'}

---

应该怎么做？即使是我直接提供传入id的行

test=Route.objects.get（id=ObjectId（'587c4c3b203ada19e8e0ecf6'）

也有相同的错误…

我认为您没有获得通过ajax发送的id。在

\u id=request.POST.get（''u id'，ObjectId（））

中，您将获得

\u id

，在ajax中，您将传递

id

。因此，您将获得默认值。请使用字符串，而不是对象id。。django处理将id转换为对象的过程id@ManasviBatra我试图将_id设置为

str（_id）

，并将其作为

Routes.objects.get（id=objectid（_id））

传递，但仍然为空..Route.objects.get（id=str（_id）），并且您是否在视图中获得了_id的值？？？@ManasviBatra，这也不起作用。它是从我的ajax视图传递的，该视图直接来自我的mongodb文档