android - Do the keys of App Engine datastore entities stay constant over time? -

android - Do the keys of App Engine datastore entities stay constant over time? -

can expect datastore key entity remain unchanged on course of study of time or encoding alter google updates app engine versions? asking because planning utilize datastore entity key unique identifier records in android app.

thanks help!!

while never alter in same appspot application (by definition of "a key uniquely identifies entity") alter in future if google deprecates hdr datastore else. example, when deprecated previous datastore (master/slave), had migrate appspot (with different app url). keys changed. migration tool handled natively stored key references , developer had take care of serialized ones. see https://developers.google.com/appengine/docs/adminconsole/migration section "migrating serialized datastore keys" official doc shows happened in lastly migration. note one-in-5-years situation aware.

android google-app-engine gae-datastore primary-key