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

If you are using CakePHP 2.3.x, you may need to add this code to your model in addition to the code that GuidoH provided, otherwise your HABTM model data may not save:

public function beforeSave($options = array()){
  foreach (array_keys($this->hasAndBelongsToMany) as $model){
    if(isset($this->data[$this->name][$model])){
      $this->data[$model][$model] = $this->data[$this->name][$model];
      unset($this->data[$this->name][$model]);
    }
  }
  return true;
}