Question

我使用urlsafe参数使用ndb.Key（）方法收到错误您将看到我用来暂时查找错误来源的大量日志记录语句。我把它缩小到这条线：

resource_section = ndb.Key(urlsafe=request.resource_section_key

我使用相同的语法将资源键插入紧接在此之前的行中，并且成功了。我已验证该实体存在于数据存储区中。我已经和我一起工作了几天，我希望你们中的一个能看到我失踪的东西。

以下是代码：

    if request.knowledge_key:
        logging.info("Logging: class KnowledgeMessageApi.insert_knowledge() - request.knowledge_key = " + request.knowledge_key) 
        # If no key exists, then we can assume it needs to be inserted
        # into the datastore.  Overwrite any exiting values with what
        # is passed into the method
        kno=ndb.Key(urlsafe=request.knowledge_key).get()
        kno.knowledge = request.knowledge
        kno.resource = ndb.Key(urlsafe=request.resource_key)
        kno.resource_section = ndb.Key(urlsafe=request.resource_section_key)
        kno.types = request.types
        kno.page = request.page
        kno.keywords = request.keywords
        kno.put()

    else:
        logging.info("Logging: class KnowledgeMessageApi.insert_knowledge() - request.knowledge = " + request.knowledge) 
        logging.info("Logging: class KnowledgeMessageApi.insert_knowledge() - request.resource_key = " + request.resource_key) 
        logging.info("Logging: class KnowledgeMessageApi.insert_knowledge() - request.resource_section_key = " + request.resource_section_key)
        types_string = ""
        for item in request.types:
            types_string += item.strip()
        logging.info("Logging: class KnowledgeMessageApi.insert_knowledge() - request.types = " + types_string)

        logging.info("Logging: class KnowledgeMessageApi.insert_knowledge() - request.page = " + str(request.page)) 
        keywords_string = ""
        for item in request.keywords:
            keywords_string += item.strip()
        logging.info("Logging: class KnowledgeMessageApi.insert_knowledge() - request.keywords = " + keywords_string) 
        #get resource key and name
        Knowledge(parent=PARENT_KEY,
                  knowledge=request.knowledge, 
                  resource = ndb.Key(urlsafe=request.resource_key),
                  resource_section = ndb.Key(urlsafe=request.resource_section_key),
                  types = types_string.split(","),
                  page = request.page,
                  keywords = keywords_string.split(",")
                  ).put()

    return request

我的堆栈跟踪如下：

    INFO     2016-07-18 18:37:16,440 module.py:788] default: "POST /_ah/spi/BackendService.getApiConfigs HTTP/1.1" 200 3958
INFO     2016-07-18 18:37:16,649 apiuser.py:20] Logging: Class ApiUser.__init__ - beginning.
INFO     2016-07-18 18:37:16,649 apiuser.py:22] Logging: Class ApiUser.__init__ - endpoints_user = endpoints.get_current_user()
INFO     2016-07-18 18:37:16,649 apiuser.py:24] Logging: Class ApiUser.__init__ - an endpoints_user exists.
INFO     2016-07-18 18:37:16,649 apiuser.py:44] Logging: Class ApiUser.__init__ - locating from endpoints email.
INFO     2016-07-18 18:37:16,661 apiuser.py:53] Logging: Class ApiUser.__init__ - attempting to populate the object.
INFO     2016-07-18 18:37:16,661 apiuser.py:57] Logging: Class ApiUser.__init__ - self.email = knouser_object.contact_email.
INFO     2016-07-18 18:37:16,661 apiuser.py:59] Logging: Class ApiUser.__init__ - self.email = knouser_object.contact_email.
INFO     2016-07-18 18:37:16,661 apiuser.py:61] Logging: Class ApiUser.__init__ - self.user_id = knouser_object.login_user_id.
INFO     2016-07-18 18:37:16,661 apiuser.py:63] Logging: Class ApiUser.__init__ - self.knouser_key_urlsafe = knouser_object.key.urlsafe().
INFO     2016-07-18 18:37:16,661 apiuser.py:65] Logging: Class ApiUser.__init__ - if knouser_object.organization:.
INFO     2016-07-18 18:37:16,661 apiuser.py:67] Logging: Class ApiUser.__init__ - self.org_key_urlsafe = knouser_object.organization.urlsafe().
INFO     2016-07-18 18:37:16,661 api_knowledge.py:56] Logging: class KnowledgeMessageApi.insert_knowledge() - authenticated_user.email = stewart.jamie@swchristian.com
INFO     2016-07-18 18:37:16,662 api_knowledge.py:58] Logging: class KnowledgeMessageApi.insert_knowledge() - authenticated_user.get_org_key()
INFO     2016-07-18 18:37:16,662 api_knowledge.py:75] Logging: class KnowledgeMessageApi.insert_knowledge() - request.knowledge = This is a test insert of knowledge.
INFO     2016-07-18 18:37:16,662 api_knowledge.py:76] Logging: class KnowledgeMessageApi.insert_knowledge() - request.resource_key = ahdkZXZ-amFtZXNzdGUtc2Nob29sLWFwcHJLCxIGRW50aXR5IhFvcmdhbml6YXRpb25fcm9vdAwLEgxPcmdhbml6YXRpb24YgICAgIDQpwoMCxIIUmVzb3VyY2UYgICAgIDElQoM
INFO     2016-07-18 18:37:16,662 api_knowledge.py:77] Logging: class KnowledgeMessageApi.insert_knowledge() - request.resource_section_key = ahdkZXZ-amFtZXNzdGUtc2Nob29sLWFwcHJSCxIGRW50aXR5IhFvcmdhbml6YXRpb25fcm9vdAwLEgxPcmdhbml6YXRpb24YgICAgIDQpwoMCxIPUmVzb3VyY2VTZWN0aW9uGICAgICA5OU
INFO     2016-07-18 18:37:16,662 api_knowledge.py:81] Logging: class KnowledgeMessageApi.insert_knowledge() - request.types = literature
INFO     2016-07-18 18:37:16,662 api_knowledge.py:83] Logging: class KnowledgeMessageApi.insert_knowledge() - request.page = 2
INFO     2016-07-18 18:37:16,662 api_knowledge.py:87] Logging: class KnowledgeMessageApi.insert_knowledge() - request.keywords = 
ERROR    2016-07-18 18:37:16,662 service.py:191] Encountered unexpected error from ProtoRPC method implementation: ProtocolBufferDecodeError (truncated)
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/jamesste/Documents/code/jamesste-school-app/api_knowledge.py", line 92, in insert_knowledge
    resource_section = ndb.Key(urlsafe=request.resource_section_key),
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/ext/ndb/key.py", line 230, in __new__
    self.__namespace) = self._parse_from_ref(cls, **kwargs)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/ext/ndb/key.py", line 318, in _parse_from_ref
    reference = _ReferenceFromSerialized(serialized)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/ext/ndb/key.py", line 821, in _ReferenceFromSerialized
    return entity_pb.Reference(serialized)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/datastore/entity_pb.py", line 1782, in __init__
    if contents is not None: self.MergeFromString(contents)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/net/proto/ProtocolBuffer.py", line 152, in MergeFromString
    self.MergePartialFromString(s)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/net/proto/ProtocolBuffer.py", line 168, in MergePartialFromString
    self.TryMerge(d)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/datastore/entity_pb.py", line 1927, in TryMerge
    d.skip(length)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/net/proto/ProtocolBuffer.py", line 650, in skip
    if self.idx + n > self.limit: raise ProtocolBufferDecodeError, "truncated"
ProtocolBufferDecodeError: truncated
INFO     2016-07-18 18:37:16,671 module.py:788] default: "POST /_ah/spi/KnowledgeMessageApi.insert_knowledge HTTP/1.1" 500 512
INFO     2016-07-18 18:37:16,672 module.py:788] default: "POST /_ah/api/knowledge/v1/knowledge?alt=json HTTP/1.1" 503 196

模特：

class Knowledge(ndb.Model):
    resource=ndb.KeyProperty(kind=Resource)
    resource_section=ndb.KeyProperty(kind=ResourceSection)
    types=ndb.StringProperty(repeated=True) #system-level categories
    knowledge=ndb.StringProperty()
    page=ndb.IntegerProperty()
    keywords=ndb.StringProperty(repeated=True) #unregulated grouping types

证明resource_section实体存在： resource_section entity screenshot

Answer 1

经过多次头疼和零食休息后，我做了我从未做过的事情......我手动干预以获得积极的结果，结果失去了产生错误的状态。所以，我发布这个作为答案，但它不是一个确定的答案。所以，我注释掉了那行代码并完成了插入sans的ResourceSection键。由于应用程序在该属性中存在None值时中断，因此我通过Google Cloud Platform上的数据存储实用程序手动插入密钥。从这一点开始，代码正常执行，编辑和插入。虽然我不知道为什么会收到错误，但这可能与第一个知识实体插入有关。无论如何，我不再有这个问题了。

ProtocolBufferDecodeError，使用ndb.Key插入密钥时“截断”（urlsafe =

1 个答案: