Hi
You will possibly find that you have exercised some code that tries to
fetch and entity with a reference, but the reference target entities
class
has not been imported first.
You must import classes prior to trying to fetch them.
Now use MyModelX.all().get() implies that you have imported MyModelX.
You have if you have MyModelY and it has a reference to a MyModelX and
you have not explicity imported it first
then MyModelY.all().get() would give a simliar error.
Rgds
T
On Aug 13, 4:01 pm, djidjadji <djidja...@gmail.com> wrote:
> 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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