gistfile1.txt

public function beforeSave($options = array()) {

  if (!isset($this->data[$this->alias]['soft_delete'])) {
    $this->data[$this->alias]['soft_delete'] = 0;
  } else {
    //na duvida, faz um exit(debug($this->data));
    $this->data[$this->alias]['soft_delete'] = $this->data[$this->alias]['valor_que_enviar'];
  }
  
  return true;
}