javax.persistence.PersistenceException: No ScalarType registered for class blah.User$$EntityBean$warp

[Edmundo Carmona Antoranz]

Hi!

I'm setting up this table where I relate users and their permissions. I'm working with the DB creating the tables by hand and then creating entities for them alongside. It has worked like a charm till now.

The entities I'm working at the moment are:
- User
- Permission
- PermissionByUser

Both User and Permission have their @Id fields sets (in both cases it's an int). Then I created PermissionByUser where I relate User and Permission. I set up the fields for them like this:

    @ManyToOne
    @JoinColumn(name = FIELD_USER)
    private User user;
    @ManyToOne
    @JoinColumn(name = FIELD_PERMISSION)
    private Permission permission;


I don't set any relationship back (@OneToMany) either in User or Permission (and perhaps that's the source of the problem, you'll tell me). The relationship is _only_ defined in PermissionByUser.

Now, when I try to check if a user has set a given permission I do it like this (in PermissionByUser):

    public static boolean userHasPermission(User user, Permission permission) {
        return Ebean.find(PermissionByUser.class).where().eq(FIELD_USER, user)
                .eq(FIELD_PERMISSION, permission).findRowCount() > 0;
    }

But I get this exception when I try to run it:

javax.persistence.PersistenceException: No ScalarType registered for class warpt.central.entities.admin.User$$EntityBean$warp
	com.avaje.ebeaninternal.server.persist.Binder.bindObject(Binder.java:183)
	com.avaje.ebeaninternal.server.query.CQueryPredicates.bind(CQueryPredicates.java:162)
	com.avaje.ebeaninternal.server.query.CQueryRowCount.findRowCount(CQueryRowCount.java:145)
	com.avaje.ebeaninternal.server.query.CQueryEngine.findRowCount(CQueryEngine.java:120)
	com.avaje.ebeaninternal.server.query.DefaultOrmQueryEngine.findRowCount(DefaultOrmQueryEngine.java:55)
	com.avaje.ebeaninternal.server.core.OrmQueryRequest.findRowCount(OrmQueryRequest.java:285)
	com.avaje.ebeaninternal.server.core.DefaultServer.findRowCountWithCopy(DefaultServer.java:1372)
	com.avaje.ebeaninternal.server.core.DefaultServer.findRowCount(DefaultServer.java:1364)
	com.avaje.ebeaninternal.server.querydefn.DefaultOrmQuery.findRowCount(DefaultOrmQuery.java:933)
	com.avaje.ebeaninternal.util.DefaultExpressionList.findRowCount(DefaultExpressionList.java:185)
	blah.PermissionByUser.userHasPermission(PermissionByUser.java:63)
	etc
	etc

What am I missing? Thanks in advance.

[Rob Bygrave]

Instead of :

.eq(FIELD_USER, user)

Try:

.eq("user.id", user.getId());

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[Edmundo Carmona Antoranz]

Thanks for your response, Rob, changing to user.getId() pulls it off but this is fairly interesting. Why do I have to compare with user.getId() but can use permission as is?

    public static boolean userHasPermission(User user, Permission permission) {
        return Ebean.find(PermissionByUser.class).where()

                .eq(FIELD_USER, user.getId())
                .eq(FIELD_PERMISSION, permission).findRowCount() > 0;
    }