Magento – Multiple Tablerate (1)

Someone asked me how to do a multiple tablerate, and actually I found it on magento forum. I am gonna list the code that I modified here:

\app\code\core\Mage\Shipping\Model\Carrier\Tablerate.php to \app\code\core\Mage\Shipping\Model\Carrier\Tablerate3.php or Tablerate(n).php

That is screen shot if you just copy my code to your site that will show on your Magento Admin Panel:

Note: This is my modified version, please read comment. In your case, your file should be similar to \app\code\core\Mage\Shipping\Model\Carrier\Tablerate.php, but except you will add a number after tablerate for Tablerate(n).

<?php 

class Mage_Shipping_Model_Carrier_Tablerate3
    extends Mage_Shipping_Model_Carrier_Abstract
    implements Mage_Shipping_Model_Carrier_Interface
{

    protected $_code = 'tablerate3';
    protected $_default_condition_name = 'package_weight';

    protected $_conditionNames = array();

    public function __construct()
    {
        parent::__construct();
        foreach ($this->getCode('condition_name') as $k=>$v) {
            $this->_conditionNames[] = $k;
        }
    }

    /**
     * Enter description here...
     *
     * @param Mage_Shipping_Model_Rate_Request $data
     * @return Mage_Shipping_Model_Rate_Result
     */
    public function collectRates(Mage_Shipping_Model_Rate_Request $request)
    {
        if (!$this->getConfigFlag('active')) {
            return false;
        }

        if (!$request->getConditionName()) {
            $request->setConditionName($this->getConfigData('condition_name') ? $this->getConfigData('condition_name') : $this->_default_condition_name);
        }

        $result = Mage::getModel('shipping/rate_result');
        $rate = $this->getRate($request);
		
/* My Edited Version. */
	$smallShippingOk = $this->checkSmallPacket($request);
/* My Edited Version */
		
        if (!empty($rate) && $rate['price'] >= 0 
     /*My Edited Version */ && $smallShippingOk /*My Edited Version */) {
            $method = Mage::getModel('shipping/rate_result_method');

            $method->setCarrier('tablerate3');
            $method->setCarrierTitle($this->getConfigData('title'));

            $method->setMethod('bestway');
            $method->setMethodTitle($this->getConfigData('name'));

            $shippingPrice = $this->getFinalPriceWithHandlingFee($rate['price']);

            $method->setPrice($shippingPrice);
            $method->setCost($rate['cost']);

            $result->append($method);
        }

        return $result;
    }

    public function getRate(Mage_Shipping_Model_Rate_Request $request)
    {
        return Mage::getResourceModel('shipping/carrier_tablerate3')->getRate($request);
    }

    public function getCode($type, $code='')
    {
        $codes = array(

            'condition_name'=>array(
                'package_weight' => Mage::helper('shipping')->__('Weight vs. Destination'),
                'package_value'  => Mage::helper('shipping')->__('Price vs. Destination'),
                'package_qty'    => Mage::helper('shipping')->__('# of Items vs. Destination'),
            ),

            'condition_name_short'=>array(
                'package_weight' => Mage::helper('shipping')->__('Weight (and above)'),
                'package_value'  => Mage::helper('shipping')->__('Order Subtotal (and above)'),
                'package_qty'    => Mage::helper('shipping')->__('# of Items (and above)'),
            ),

        );

        if (!isset($codes[$type])) {
            throw Mage::exception('Mage_Shipping', Mage::helper('shipping')->__('Invalid Table Rate code type: %s', $type));
        }

        if (''===$code) {
            return $codes[$type];
        }

        if (!isset($codes[$type][$code])) {
            throw Mage::exception('Mage_Shipping', Mage::helper('shipping')->__('Invalid Table Rate code for type %s: %s', $type, $code));
        }
        return $codes[$type][$code];
    }

    /**
     * Get allowed shipping methods
     *
     * @return array
     */
    public function getAllowedMethods()
    {
        return array('bestway'=>$this->getConfigData('name'));
    }
	
/* My Own Function, original file does not have this function */
	protected function checkSmallPacket($request) {
	
		$items = $request->getAllItems();
		foreach ($items as $item) {
			$_product=$item->getProduct();
			$_product->load($_product->getId());
			if ($_product->getData('small_item') == "0") 
				return false;
		}
		return true;
	}
/* My Own Function, original file does not have this function */
}