Kohana 3 ORM - How to tell if the current model being saved is new?

Question

In my ORM model, I'd like to save some default values which are calculated based on other values. The best I could come up with is:

function save(){
    if( ! $this->loaded()){
        // Set values here
    }
    parent::save();
}

Does anybody know if there is a better/recommended way to do this, or should this be sufficient for most cases? Thanks :)

Answer 1

Your implementation is good. The only improvement you could do is just replace your condition to:

if (!$this->_loaded) {

Answer 2

It`s very good question.

Unfortunnaly your way only possible.

Below ORM::create () function wich called from ORM::save().

public function create(Validation $validation = NULL)
{
  if ($this->_loaded)
    throw new Kohana_Exception('Cannot create :model model because it is already loaded.', array(':model' => $this->_object_name));

  // Require model validation before saving
  if ( ! $this->_valid OR $validation)
  {
    $this->check($validation);
  }

  $data = array();
  foreach ($this->_changed as $column)
  {
    // Generate list of column => values
    $data[$column] = $this->_object[$column];
  }

  if (is_array($this->_created_column))
  {
    // Fill the created column
    $column = $this->_created_column['column'];
    $format = $this->_created_column['format'];

    $data[$column] = $this->_object[$column] = ($format === TRUE) ? time() : date($format);
  }

  $result = DB::insert($this->_table_name)
  ->columns(array_keys($data))
  ->values(array_values($data))
  ->execute($this->_db);

  if ( ! array_key_exists($this->_primary_key, $data))
  {
    // Load the insert id as the primary key if it was left out
    $this->_object[$this->_primary_key] = $this->_primary_key_value = $result[0];
  }
  else
  {
    $this->_primary_key_value = $this->_object[$this->_primary_key];
  }

  // Object is now loaded and saved
  $this->_loaded = $this->_saved = TRUE;

  // All changes have been saved
  $this->_changed = array();
  $this->_original_values = $this->_object;

  return $this;
}

As you can see, there are no defaut values ...