Question

DB Config:

db=mysql://root@localhost/db
jpa.dialect=org.hibernate.dialect.MySQLDialect
....
db_other.url=jdbc:mysql://localhost/db2
db_other.driver=com.mysql.jdbc.Driver
db_other.user=root
db_other.pass=
db_other.jpa.dialect=org.hibernate.dialect.MySQLDialect

In these databases i have absolutely exact tables (clones).
But the difference is that there’s different values in these tables.
(‘Value #1’ and ‘Value #2’ respectively).

A simple model:

package models;

import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.PersistenceUnit;
import javax.persistence.Table;
import play.db.jpa.GenericModel;

@Entity
@PersistenceUnit(name="other")
@Table(name="testtable")
public class DbTest extends GenericModel {
    @Id
    public String value;
}

the rest of code:

List<DbTest> lst = DbTest.findAll();
if(!lst.isEmpty())
        System.out.println(lst.get(0).value);

It always prints Value #1. (It must be ‘Value #2’ as it’s in db2).
Surely, i’ve specified @PersistenceUnit(name=”other”).
But that doesn’t have any effect. Even if i change name of pers.unit
to random, no any errors.
This annotation is not working or just being ignored?
Or i did mistake somewhere? :/

p.s
Also, i’ve tried to get the EntityManager as it’s shown in the framework manual
(/documentation/jpa#multiple).

EntityManager em = JPA.getJPAConfig("other").em();

But it’s not possible:
<< The method getJPAConfig(String) is undefined for the type JPA >>

Answer 1

Play 1.2.3 does not support multiple databases. The Support for
multiple databases section was included in this documentation page by
mistake (the feature is only in the master branch on github).

(cannot find the source now)

look e.g. here: http://groups.google.com/group/play-framework/browse_thread/thread/4079cc961db8c750?pli=1