I need to add a ROLE relation to a USER.
So I did the following:
$user->add('roles', $roles_ids_array );
It works, but the system tries to add it without checking if the relation ALREADY EXISTS in the DB, giving me a mysql "Duplicate entry" error.
In Kohana 2.x it works perfectly (the system does the auto check). Is there an easy to do this in KO3.3?
How can I do that without using $user->has(etc)?
As kohana does not check for previous relations,
we must tell it wich ids to remove/add doing this:
// two arrays: existing ids array and new ids array
// with these lines you'll get what you need, rather than doing foreach,etc
// array_diff is a php function
$ids_remove = array_diff($array1 ,$array2);
$ids_add = array_diff($array2 ,$array1);
// now simply execute kohana's native functions to add/remove many-to-many relations
$obj->remove('relation',$ids_remove) )
$obj->add('relation',$ids_add) )