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Subject: Re: Getting null instead of the actual value
From: Joe Baldwin <jfbaldwin@earthlink.net>
In-Reply-To: 
 <CAPFNckicWsvKb8JME4XhL8YemvZ+h7jzNj4MdbFEs7N+9LLAgw@mail.gmail.com>
Date: Tue, 6 Sep 2011 11:39:18 -0400
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References: 
 <CAPFNckicWsvKb8JME4XhL8YemvZ+h7jzNj4MdbFEs7N+9LLAgw@mail.gmail.com>
To: user@cayenne.apache.org

Christian,

It is a tad difficult to follow all of your pseudo-code (as with all =
pseudo-code), but it appears that you are adding to "UserRoles" object =
via Cayenne and that you have left out the step to "commitChanges" on =
your ObjectContext.

Here is the basic pseudo code for Cayenne usage model:

1. get your ObjectContext (ex: BaseContext.getThreadObjectContext();)
2. create a new entity on the OC (ex: =
(UserRoles)oc.newObject(UserRoles.class);)
3. initialize your entity with values
4. commit changes (ex: oc.commitChanges();)

Totally easy! :)

Joe


On Sep 6, 2011, at 11:14 AM, Christian Grobmeier wrote:

> Folks,
>=20
> I need your help. An error in my app bugs me and I am looking
> desperately were it could happen.
>=20
> The use case is:
> - create a user
> - create a user_role object
> - select one of the existing roles
> - connect all together and commit
>=20
> I see that all values are correct in the database (mysql console)
>=20
> But after the user registered, my app fails with the error "no role".
>=20
> What I do is basically:
>=20
> ur =3D User.getUserRoles();
> foreach ur:
>   r =3D ur.getRole()
>=20
>=20
> And the r reference is null. I am not sure what I am doing wrong. Any
> hints what I could check in my Cayenne app?
>=20
> I add a role to a user liek this:
>=20
> User user ...
>=20
> UserRoles userRoles =3D new UserRoles();
> userRoles.setUser(user);
> userRoles.setRole(role);
> user.addToUserRoles(userRoles);
> role.addToRolesToJoin(userRoles);
>=20
> Any hints highly apprecitated - thanks in advance
>=20
> Christian