Magento : How do I set the set the cart price? - php

Question

I am a newbie to Magento Community Edition.
It might be a little thing but don’t know how to do that.
I want to set the cart price to cartprice * 5?
Example - if the cart items weight is greater then 10kg then set cartprice to (10 * 5).

Answer 1

You can do this by event observer.
<checkout_cart_product_update_after>
<observers>
<update_price_edit_save_product>
<class>ABC_MModule_Model_Observer</class>
<method>cartUpdatePrice</method>
</update_price_save_product>
</observers>
</checkout_cart_product_update_after>
in Observer class define this function, and do the implementation accordinly to set the price by item.
public function cartUpdatePrice(Varien_Event_Observer $obs){
// Get the quote item
$item = $obs->getQuoteItem();
// Ensure we have the parent item, if it has one
$item = ( $item->getParentItem() ? $item->getParentItem() : $item );
//hidden filed from detail page
$item->setCustomPrice($new_price);
$item->setOriginalCustomPrice($new_price);
$item->getProduct()->setIsSuperMode(true);
}

Answer 2

You can make your own module using event observers to accomplish this. First define a store config value for weight and how many times it should be increased i.e. 10kgs and 5 times in your requirement.
Using event checkout_cart_product_update_after you can call your observer function and include below code in that function
$items = Mage::getSingleton('checkout/session')->getQuote()->getAllItems();
$weight = 0;
foreach($items as $item) {
$weight += ($item->getWeight() * $item->getQty()) ;
}
if($weight > Mage::getStoreConfig('weight'))){
$weight = $weight * Mage::getStoreConfig('number of times you want to increase)
}
return $weight;