Getting random entry from Objectify entity

Question

How can I get a random element out of a Google App Engine datastore using Objectify? Should I fetch all of an entity's keys and choose randomly from them or is there a better way?

Answer 1

Assign a random number between 0 and 1 to each entity when you store it. To fetch a random record, generate another random number between 0 and 1, and query for the smallest entity with a random value greater than that.