Help with validation rule checking for uniqueness

[eluser]Iván Argulo[/eluser]
Maybe it could be done with callbacks.

For example:

Code:

$this->form_validation->set_rules('username', 'Username', 'required|callback_check_user');

function check_user($user) {
// Do all stuff here
}

I remember we did this a few months ago. We use a session to store the current ID of the record, so we tested if the data exists excluding the current record.

Hope it helps you.