CODEWITHSUNDEEP
google-app-engineobjectify
ruhong
ruhong

Reputation: 1903

Use Objectify to retrieve entity group's metadata

How can I use Objectify to retrieve the entity group's metadata, specifically the __version__ property?

I would like to use the __version__ property to determine whether a transaction should retry. That's because "it is possible to receive a DatastoreTimeoutException or DatastoreFailureException even when a transaction has been committed and will eventually be applied successfully."

Upvotes: 0

Views: 71

Answers (1)

stickfigure
stickfigure

Reputation: 13556

There is nothing special in Objectify to manage this field, but if you create a field like this it should get populated with the version number:

@IgnoreSave long __version__;

That's two underscores on each side.

Upvotes: 1

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