/**
* Get the primary key from whatever value you have
*
* @param string $model_name The name of the model
* @param string|integer|Jam_Validated|array $value the value or a container of the value
* @return string|integer|NULL NULL when no value is provided or could be extracted.
*/
public static function primary_key($model_name, $value)
{
if (!$value) {
return NULL;
}
if ($value instanceof Jam_Validated) {
return $value->id();
}
if (is_integer($value) or is_numeric($value)) {
return (int) $value;
}
if (is_string($value)) {
return $value;
}
if (is_array($value)) {
return Arr::get($value, Jam::meta($model_name)->primary_key());
}
}
/**
* Get the belonging model for this association using the foreign key,
* if the data was changed, use the key from the changed data.
* Assign inverse_of
*
* @param Jam_Validated $model
* @param mixed $value changed data
* @param boolean $is_changed
* @return Jam_Model
*/
public function get(Jam_Validated $model, $value, $is_changed)
{
if ($is_changed) {
if ($value instanceof Jam_Validated or !$value) {
return $value;
}
$key = Jam_Association::primary_key($this->foreign_model, $value);
if ($key) {
$item = Jam::find($this->foreign_model, $key);
} elseif (is_array($value)) {
$item = Jam::build($this->foreign_model);
} else {
$item = NULL;
}
if ($item and is_array($value)) {
$item->set($value);
}
} else {
$item = Jam::all($this->foreign_model)->join_table($this->branches_table)->on($this->ansestor_key, '=', ':primary_key')->on($this->depth_key, '=', DB::expr(':depth', array(':depth' => 1)))->end()->where($this->branches_table . '.' . $this->descendant_key, '=', $model->id())->first();
}
return $this->set($model, $item, $is_changed);
}
public function set(Jam_Validated $model, $value, $is_changed)
{
if ($value instanceof Jam_Model) {
if ($this->is_polymorphic()) {
$value->{$this->polymorphic_key} = $model->meta()->model();
}
if ($model->loaded()) {
$value->{$this->foreign_key} = $model->id();
}
if ($this->as) {
$value->retrieved($this->as, $model);
}
if ($this->inverse_of) {
$value->retrieved($this->inverse_of, $model);
}
}
return $value;
}
