/**
  * doFind
  *
  * @param array $conditions
  * @param array $orders
  * @param int   $start
  * @param int   $limit
  *
  * @return  mixed|void
  */
 protected function doFind(array $conditions, array $orders, $start, $limit)
 {
     // Do find first
     $dataset = parent::doFind($conditions, $orders, $start, $limit);
     // Loop the relation mapper.
     foreach ($this->relations as $field => $relation) {
         // Loop each data.
         foreach ($dataset as &$data) {
             // Prepare sub conditions
             $conditions = array();
             // Find relation data to this field.
             foreach ($relation['relations'] as $left => $right) {
                 $conditions[$right] = $data->{$left};
             }
             $data->{$field} = $relation['table']->findOne($conditions);
         }
     }
     return $dataset;
 }