How to force a total product quantity to 1 in cart

[concorde44]

Hi,

I was looking on the forums for this answer, without finding it.
I created a product as a gift, with a value of 0 and quantity of 1000pcs in stock.
So I was looking for a solution to only give one gift even if the customer tries to change it qty to 2 or more.

So I dig it and here is the answer : 

Includes\classes\shopping_cart.php

find function update_quantity : 

Find : $this->contents[$products_id_string] = array('qty' => $quantity);

replace with

$gift=array('1045','14'}; // modify with the id's of products you want only 1 in hte cart
if (in_array($products_id, $gift)) { 
		$this->contents[$products_id_string] = array('qty' => '1'); // Force total qty to only 1
	} else {
		$this->contents[$products_id_string] = array('qty' => $quantity);
	}

 

Hope this helps

Seb