(bug?) Play 1.2: call to merge() saving the entity

[Cyrille37]

Hi,

With Play 1.2

In documentation it's no write that a call to merge() will save new
entity.
http://www.playframework.org/documentation/1.2/jpa#save

Here is the test case :

package models.essais;
import javax.persistence.*;
import play.data.validation.*;
import play.db.jpa.GenericModel;
@Entity
public class Person extends GenericModel {
@Id
@GeneratedValue
public int id ;
@Required
@MinSize(2)
public String name ;
}

package controllers;
import models.essais.Person;
import play.Logger;
import play.mvc.*;
public class Essais02 extends Controller {

public static void index() {

Logger.debug("Person count %d", Person.count());

Person p = new Person();
p.name = "blabla";

p.merge();

render("Essais/essais02.html");
}
}

import play.*;
import play.jobs.*;
@OnApplicationStart
public class Bootstrap extends Job {
@Override
public void doJob() {

Fixtures.loadModels("data-essais.yml");
}
}

And the "data-essais.yml":

essais.Person(p1):
name: Foo

Refresh the page Essais02 and you will see the Person.count()
incrementing.

And this "bug?" is only for just created entity, for existing entity
the merge() works has expected: no change in the db.

The second test case (add this method to controller Essais02):

public static void test2() {

Logger.debug("Person count %d", Person.count());

Person p = Person.all().first();
Logger.debug("first Person name: %s", p.name);

p.name = "blabla";

p.merge();

render("Essais/essais02.html");
}

You can see that for the existed entity the "p.name" never change, the
count never increase. That's what expected.

Cheers
Cyrille.

[Guillaume Bort]

Check the JPA documentation. EntityManager.merge() insert new objects
and update existing ones.

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[cyrille giquello]

2011/4/19 Guillaume Bort <guillau...@gmail.com>:

> Check the JPA documentation. EntityManager.merge() insert new objects
> and update existing ones.

Thanks,
Sorry for my bad JPA knowledge.

I just search how to re-attach detached manyToOne collections objects.

I'll read back the JPA documentation.

Regards
Cyrille.