ProtocolBufferDecodeError，"truncated" 使用 ndb.Key(urlsafe=
ProtocolBufferDecodeError, "truncated" when inserting key using ndb.Key(urlsafe=
我在使用 ndb.Key() 方法并使用 urlsafe 参数时收到错误消息。
您会看到很多我用来临时查找错误来源的日志记录语句。我已将范围缩小到这一行：
resource_section = ndb.Key(urlsafe=request.resource_section_key
我使用相同的语法在这一行的前一行插入资源密钥，并且成功了。我已验证该实体存在于数据存储区中。我已经为此工作了几天，我希望你们中的一个能看到我遗漏的东西。
代码如下：
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
型号：
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
resource_section 实体存在的证明：
resource_section entity screenshot
经过多次挠头和小憩后，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。因此，我将此作为答案发布，但它不是确定的答案。因此，我注释掉了那行代码并完成了没有 ResourceSection 键的插入。由于当 属性 中有 None 值时应用程序中断，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，包括编辑和插入。虽然我不知道为什么会收到错误，但它可能与这是第一个 Knowledge 实体插入有关。无论如何，我不再有这个问题了。
我在使用 ndb.Key() 方法并使用 urlsafe 参数时收到错误消息。
您会看到很多我用来临时查找错误来源的日志记录语句。我已将范围缩小到这一行：
resource_section = ndb.Key(urlsafe=request.resource_section_key
我使用相同的语法在这一行的前一行插入资源密钥，并且成功了。我已验证该实体存在于数据存储区中。我已经为此工作了几天，我希望你们中的一个能看到我遗漏的东西。
代码如下：
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
型号：
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
resource_section 实体存在的证明： resource_section entity screenshot
经过多次挠头和小憩后，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。因此，我将此作为答案发布，但它不是确定的答案。因此，我注释掉了那行代码并完成了没有 ResourceSection 键的插入。由于当 属性 中有 None 值时应用程序中断，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，包括编辑和插入。虽然我不知道为什么会收到错误，但它可能与这是第一个 Knowledge 实体插入有关。无论如何，我不再有这个问题了。