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Update "My Cart" link using AJAX add to cart Magento

Hi peoples,

I have a question regarding AJAX calls in Magento. I've installed an extension which allows products to be added to the shopping cart without refreshing the page and it is working fine for the cart sidebar. However, I also have the number of items displayed in the
"My Cart (4 items)" link in the header which is not being updated until the page is refreshed.

I'm looking for a way to update the toplink too?

If there are any suggestions please let me know or if you would like me to post some code for you to reference...

Thanks in advance!
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rafique12
Asked:
rafique12
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1 Solution
 
Manoj PatilSr. Software EngineerCommented:
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Eddie ShipmanAll-around developerCommented:
I have had a problem with Magento and ajax calls before. It seems that the ajax call does not retrieve the same Magento session as the one it is being called from. I found this out when trying to check the logged in user using ajax.

I don't really have a solution, though.
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rafique12Author Commented:
I have the situation where the cart in the sidebar updates but I'm not sure how to update the header???

Its something I need to solve but can't find a solution either.
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Eddie ShipmanAll-around developerCommented:
We wrote a plugin to modify our header. Do you have the capability to do that?
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rafique12Author Commented:
Sure I can do it...! :-)
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Eddie ShipmanAll-around developerCommented:
We use this "template", called usernav.html (located in our default template folder
{exp:embedded_cart site_url = "{site_url}" site_url_https = "{site_url_https}"}

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Notice also the 2 global variables, I don't think you really need them.

We load it with this script:
$.ajax({
  url: '/usernav',
  success: function(data) {
  $('.userNav').html(data);
}	

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here is out embedded_cart plugin code, save as pi.embedded_cart.php in third_party/embedded_cart directory
<?php
if ( ! defined('BASEPATH')) 
    exit('No direct script access allowed');

require_once('/srv/www/htdocs/store/app/Mage.php');

class Embedded_cart {

    function Embedded_cart() {
        $site_url = 'http://' . $_SERVER['HTTP_HOST'] . '/';
        $site_url_https = 'https://' . $_SERVER['HTTP_HOST'] . '/';
        
        umask(0);
        Mage::app();
        $pidsess = Mage::getSingleton('core/session', array('name'=>'frontend'));
        
        $cart_count = 0;
        Mage::getSingleton('checkout/cart')->getItemsCount();
        $cart = Mage::helper('checkout/cart')->getCart();
        $cart_count = $cart->getItemsCount();

        // Cart now contains the number of items, though it can be null instead of 0,
        // so we should check that.
		
        if ($cart_count > 0) {
            $result = "<span class=\"carticon\">($cart_count)</span><a href=\"{$site_url}store/checkout/cart/\">My Cart</a>\n";
        } else {
            $result = "<span class=\"carticon\">(0)</span><a href=\"{$site_url}store/checkout/cart/\">My Cart</a>\n";
        }    
        
        $magsession = Mage::getSingleton('customer/session');
        if ($magsession->isLoggedIn() == true) {
        	setcookie("loggedin","yes",time()+3600, '/', $_SERVER['HTTP_HOST']);
		$customer = Mage::getSingleton("customer/customer")->load($magsession->getCustomerId()); 
        	$cname = $customer->getName();
        	$result  .= "<span>Welcome, $cname!</span>";
        	$result  .= "<a href=\"{$site_url}store/customer/account/logout/\">Logout</a>\n";
        } else {
            $result  .= "<a href=\"{$site_url_https}login/\">Login</a>\n";
            // We do other things, like remove items from the cart, here due to our business rules
        }
        echo $result;
    }
}

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The benefit of using this is that you don't have to worry about the cart counts, it reads them directly.
Now I believe this only works if you reload or redirect but this is something you can test.
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rafique12Author Commented:
Ok, I will give it a shot. Thanks pal!
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rafique12Author Commented:
Nice one!
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