public function save()
{
$mapper = DbSingleton::getMessageMapper();
$params = ['parent_id' => $this->parent_id, 'child_id' => $this->child_id, 'message' => $this->message, 'date' => $this->date];
$this->doSave($mapper, $params);
}
public function save()
{
$mapper = DbSingleton::getMessageMapper();
$params = ['parent_id' => $this->parent_id, 'child_id' => $this->child_id, 'message' => $this->message, 'date' => $this->date];
$this->doSave($mapper, $params);
}