对象没有属性 _Message__decoded_fields

Question

我有两个模型：

class Location(EndpointsModel):
    geoLocation = ndb.GeoPtProperty()
    street = ndb.StringProperty()
    city = ndb.StringProperty()
    state = ndb.StringProperty()

class UserPost(EndpointsModel):
    _message_fields_schema = ("entityKey", "title", "description", "category", "date", "time", "status", "locationOne")
    category = ndb.IntegerProperty(indexed=True,validator=checkIfValidCategory)
    title = ndb.StringProperty()
    description = ndb.TextProperty()
    date = ndb.DateProperty(indexed=True,auto_now_add=True)
    time = ndb.IntegerProperty(indexed=True)
    status = ndb.IntegerProperty(indexed=True,validator=checkIfValidStatusType) 
    locationOne = ndb.StructuredProperty(Location,indexed=False)

我正在尝试通过以下方法在 UserPost 上插入：

@UserPost.method(name='userPost.insert', path='userPost/insert', http_method='POST')
def userPost_insert(self,r):
    """ insert userPost """
    user = Auth.get_current_user(verified_email_required=True)
    if user is None:
        raise endpoints.UnauthorizedException('You must have a verified account before you can post')
    if r.title is None:
        raise endpoints.BadRequestException('Missing title')
    i_post = r
    i_post.put()
    return i_post

这是来自客户端的JSON：

{
    "title":"asdf",
    "details":"asdf",
    "locationOne":{
        "state":"test",
        "geoLocation":{
            "lon":0.127592,
            "lat":51.503407051
        },
        "city":"test",
        "street":"test"
    }
}

如果我取出 locationOne，它会起作用，但是当我尝试使用该位置插入时，出现错误。这是我的堆栈跟踪：

INFO     2016-03-25 17:08:52,389 module.py:787] default: "POST /_ah/spi/Auth.CurrentUser HTTP/1.1" 200 207
INFO     2016-03-25 17:08:52,389 module.py:787] default: "GET /_ah/api/auth/v1.0/current_user HTTP/1.1" 200 224
INFO     2016-03-25 17:09:01,631 module.py:787] default: "POST /_ah/spi/BackendService.getApiConfigs HTTP/1.1" 200 95185
ERROR    2016-03-25 17:09:01,644 service.py:191] Encountered unexpected error from ProtoRPC method implementation: AttributeError ('Location' object has no attribute '_Message__decoded_fields')
Traceback (most recent call last):
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/protorpc-1.0/protorpc/wsgi/service.py", line 181, in protorpc_service_app
    response = method(instance, request)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/endpoints-1.0/endpoints/api_config.py", line 1331, in invoke_remote
    return remote_method(service_instance, request)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/protorpc-1.0/protorpc/remote.py", line 414, in invoke_remote_method
    response = method(service_instance, request)
  File "/Users/buddydelaune/Dev/Apps/noble-py-proto/endpoints_proto_datastore/ndb/model.py", line 1408, in EntityToRequestMethod
    request = cls.FromMessage(request)
  File "/Users/buddydelaune/Dev/Apps/noble-py-proto/endpoints_proto_datastore/ndb/model.py", line 1232, in FromMessage
    to_add = FromValue(value_property, value)
  File "/Users/buddydelaune/Dev/Apps/noble-py-proto/endpoints_proto_datastore/ndb/model.py", line 139, in FromValue
    return modelclass.FromMessage(value)
  File "/Users/buddydelaune/Dev/Apps/noble-py-proto/endpoints_proto_datastore/ndb/model.py", line 1216, in FromMessage
    if not field.name in message._Message__decoded_fields:
AttributeError: 'Location' object has no attribute '_Message__decoded_fields'

任何对此的见解将不胜感激。提前致谢。

Answer 1

我不熟悉 EndpointsModel，但查看您的代码，我可以看到 Location 模型没有

的条目

_message_fields_schema

就像您对 UserPost 模型所做的一样。你为什么不试试把它放上去看看它是否能解决问题？

Answer 2

抱歉，我应该早点回答这个问题，但这个问题已经解决了。这实际上是 endpoints-proto-datastore 模型的一个错误，其中传入的 json 没有被正确解析并转换为它们各自的数据存储实体。我发布了对这个问题的更好描述 here and you can see the fix implemented here。

对象没有属性 _Message__decoded_fields

object has no attribute _Message__decoded_fields

python

google-app-engine

google-cloud-endpoints

google-cloud-datastore

google-app-engine-python