/**
  *  
  *  
  *  
  *  
  *  @since 
  *  
  *  @return Return_Description
  *  
  *  @access public
  */
 public function __construct()
 {
     $this->primary_key = 'author_id';
     $this->version = '1.0';
     parent::__construct('mbdbmk_authors');
 }
 public function save($data, $id, $auto_increment = false, $type = '')
 {
     // does not have a regular PK because it gets it from the posts table
     //so the "primary key" field has to be added as one to insert (not auto-increment)
     if ($type == '') {
         $type = $this->post_type;
     }
     return parent::save($data, $id, false, $type);
 }