protected function belongs_to($associated_class_name, $foreign_key_name = null, $foreign_key_name_in_associated_models_table = null, $connection_name = null)
{
// Added: to determine eager load relationship parameters
$this->relating = 'belongs_to';
$associated_table_name = self::_get_table_name(self::$auto_prefix_models . $associated_class_name);
$foreign_key_name = self::_build_foreign_key_name($foreign_key_name, $associated_table_name);
$associated_object_id = $this->{$foreign_key_name};
// Added: to determine eager load relationship parameters
$this->relating_key = $foreign_key_name;
$desired_record = null;
if (is_null($foreign_key_name_in_associated_models_table)) {
//"{$associated_table_name}.primary_key = {$associated_object_id}"
//NOTE: primary_key is a placeholder for the actual primary key column's name
//in $associated_table_name
$desired_record = self::factory($associated_class_name, $connection_name)->where_id_is($associated_object_id);
} else {
//"{$associated_table_name}.{$foreign_key_name_in_associated_models_table} = {$associated_object_id}"
$desired_record = self::factory($associated_class_name, $connection_name)->where($foreign_key_name_in_associated_models_table, $associated_object_id);
}
return $desired_record;
}