Question

In the Codeigniter Framework, I can validate an Unique field in the MYSQL Database using the “Form Validation Class”. Exemple:

$this->form_validation->set_rules('form_field', 'form_label', 'is_unique[table.field]');

Work perfectly, but, I need validate a field from a table with 2 index. Exemple:

UNIQUE INDEX `id_aluno` (`id_aluno`, `ano`),

The Codeigniter Framework can do it natively?

Answer 1

I don’t think that CI has built-in case for combined PK but I would use callback_ like this: but note that you have to send the second PK as extra and the rule should be applied on the first $PK see callbacks for more info about that

$this->form_validation->set_rules('form_field', 'form_label', 'callback_combpk[$pk2]');
    public function combpk($pk1, $pk2)
        {
               $this->db->where('field1', $pk1);
               $this->db->where('field2', $pk2);
               $result = $this->db->get('table');
               if($result->num_rows() > 0)
               {
                  $this->form_validation->set_message('combpk','something'); // set your message
                  return false;
               }
               else{ return true;}

        }