erp/core/CoreApp/models/Model_commodity.php

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); 
class Model_Commodity extends Lin_Model 
{
	function __construct(){
	parent::__construct();
	$this->load->database();
	$this->table = 'commodity';
    $this->load_table('commodity');
}
	public function get_productid($productid)
	{
		return  $this->find("productid = '$productid'");	
	}
}  //end class