Best practice to store relations in Java GAE with datastore

Question

I wonder what is best practice to store relations in GAE with datastore.

If I have User and UserItem. How should I store reference to User inside UserItem?

Should I store:

• hashed key value (eg: ag1taWNlM2hlZGdlaG9ncg8LEglMZXZlbFVzZXIYSAw )
• unhashed key value (eg: User("1") )
• any other suggestion?

Answer 1

在Java中，您将使用Key属性存储对另一个数据存储对象的引用。