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I understand that they are not supposed to be changed, this is somewhat of a schema migration and only a one-time thing.
I would like to change the key names of entities in my Google App Engine application, effectively deleting and re-crating an entity and updating all references to it.
What is the best way to do this? I’m interesting in hearing anyone’s experience with such things.
Since changing the key name is functionally identical to creating a new, identical entity with that key, what you want to do is clone the entity with the new key. Here’s some code that does just that.