I just got this error while processing a request
KindError: No implementation for kind 'MyModelX'
I returned to the home page and requested the same page again a few
seconds later and the error was gone.
Now it can find the implementation.
I use the Python API, and the error was raised during fetching a
ReferenceProperty object.
It was not a datastore timeout because the CPU usage was
ms=79 cpu_ms=100 api_cpu_ms=42
What can be the cause of this failure to find an implementation for a kind?
------------------
File
"/base/python_runtime/python_lib/versions/1/google/appengine/ext/db/__init__.py",
line 3206, in __get__
instance = get(reference_id)
File
"/base/python_runtime/python_lib/versions/1/google/appengine/ext/db/__init__.py",
line 1314, in get
cls1 = class_for_kind(entity.kind())
File
"/base/python_runtime/python_lib/versions/1/google/appengine/ext/db/__init__.py",
line 267, in class_for_kind
raise KindError('No implementation for kind \'%s\'' % kind)
KindError: No implementation for kind 'MyModelX'
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