HABTM form validation in CakePHP

Question

I have a Projects table and a Users table which are linked by a HABTM relation. In the \"add\" new Project page I have a multiple checkbox section to select Users for the ne

Answer 1

As per my comment on Guido's answer above, I use Guido's answer exactly, however I modify the data with the beforeSave callback before it saves to the database.

I have this issue on Cake 2.4.5+

public function beforeSave($options = array()) {
    $temp = $this->data['Group']['User'];
    unset($this->data['Group']['User']);
    $this->data['User']['User'] = $temp;

    return true;
}