GAE JAVA-按属性获取对象

Question

I have Entity say, User { id (primary_key), phone } to be stored in Datastore.

While Retrieving same i can use getObjectById(User.class,id) to get object. Is there way to get object with non-key property, say phone.

As per the documentation, Datastore creates index updates for Property "phone" too. How do we use this index to get result?

Answer 1

You can simply use a JDO Query like following and Datastore will query on the non-key phone property (assuming you haven't set to to be unindexed ).

q = pm.newQuery(User.class,"phone == '1234567890'");