Kohana 3.2 ORM many-to-many - wrong field names

Question

I trying to make many-to-many relation between 2 models: Users_Role and Users_Right

class Model_Users_Role extends ORM{
    protected $_has_many = array(
        'rights' => array(
            'model'   => 'users_right',
            'through' => 'users_roles_rights',
        ),
    ); 
}

class Model_Users_Right extends ORM{    
    protected $_has_many = array(
        'roles' => array(
            'model'   => 'users_role',
            'through' => 'users_roles_rights',
        ),
    );
}

I'm trying to do this:

$role = ORM::factory('users_role', 1);
$right = ORM::factory('users_right', 1);
$right->add('roles', $role);

Error:

Database_Exception [ 1054 ]: Unknown column 'role_id' in 'field list' [ INSERT INTO `users_roles_rights` (`users_right_id`, `role_id`) VALUES ('1', '1') ]

---

I tryed to make it on the other side:

$role = ORM::factory('users_role', 1);
$right = ORM::factory('users_right', 1);        
$role->add('rights', $right);

New error:

Database_Exception [ 1054 ]: Unknown column 'right_id' in 'field list' [ INSERT INTO `users_roles_rights` (`users_role_id`, `right_id`) VALUES ('1', '1') ]

I expected ORM to use users_role_id and users_right_id field names in pivot table, but it uses wrong name of far key? Where I have made a mistake?

Answer 1

Check out where the default values are set. Try this:

class Model_Users_Role extends ORM{
    protected $_has_many = array(
        'rights' => array(
            'model'   => 'users_right',
            'far_key' => 'users_right_id',
            'through' => 'users_roles_rights',
        ),
    ); 
}

class Model_Users_Right extends ORM{    
    protected $_has_many = array(
        'roles' => array(
            'model'   => 'users_role',
            'far_key' => 'users_role_id',
            'through' => 'users_roles_rights',
        ),
    );
}

Kohana does not check that the relationship does not already exist.

Either enforce this in the database table with a composite unique key on the two foreign key columns, or make your code check that the relationship does not already exist before adding.