My question was unclearly formulated.  I intended to ask, would it be
possible to do what I described *after* the migration?  In other
words, would calling db.Key() on the str(old_key) 'convert' it to the
new key?  My plan is to do a simple brute-force copy, then convert
keys on-demand in a lazy fashion after migration.

I previously saw a 'rebuild key' script:
http://blog.shnap.com/migrating-to-the-google-app-engine-high-repl  I
assume this can be called 'after migration'.  But my question is based
on (wishful?) thinking that perhaps, simply calling db.Key on a legacy
MS string key would be recognized and converted to the appropriate
format for the aliased MS datastore.

I also understand that I can do a schema change before the migration.
And do appreciate Robert's suggestion to make a virtue out of
necessity during the conversion.  But my philosophy is to keep things
simple and not try to do too much at one time:)

But


On Aug 4, 6:24 pm, Tim Hoffman <[email protected]> wrote:
> Hi John
>
> You examples are the same
>
> old_keys = [str(key1), str(key2),str(key3)]
> new_keys = [str(db.Key(i)) for i in old_keys]
>
> new_keys would be
>
> new_keys = [db.Key(i) for i in old_keys]
> assuming new_keys has been declared as db.ListProperty(db.Key)
>
> Rgds
>
> Tim

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