I need to add comment to cart page using observer . I need to know better way. Is it better to add custom option. i have tried using following code but no success

$option = array(
'is_delete' => 0,
'is_require' => false,
'previous_group' => 'text',
'title' => 'Shipping Description',
'type' => 'field',
'price_type' => 'fixed',
'price' => '0.0000'

I am using checkout_cart_product_add_after observer . comment is only for display purpose so it is custom option is better or any other option

  • how can i Add custom option after product add to cart ?? Nov 21, 2013 at 7:38

4 Answers 4


If you want to add the possibility for the customer to add a comment, you can greatly use the "add gift message" option, which magento offers out of the box. Just change the translation


In your theme, for the file: template/checkout/cart.phtml
Add the new heading along with other heading for cart items.

<th><?php echo $this->__('Comments') ?></th>

In the file: template/checkout/cart/item/default.phtml
Add a new column

<td class="a-center">
<textarea name="cart[<?php echo $_item->getId() ?>][comments]" rows="3" cols="20"><?php echo $_item->getItemcomment() ?></textarea>

For Older version of Magento it would be:

<td class="a-center">
<textarea name="cart[<?php echo $_item->getId() ?>][comments]" rows="3" cols="20"><?php echo $this->getItemItemcomment($_item) ?></textarea>

The next step is to save the comment in DB, when customer update the cart. So add a new field ‘itemcomment’ in the tabel ‘sales_flat_quote_item’. (For older version of Magento the table would be ‘sales_quote_item’)

Now we are going to add the code which will do the DB operation. For this we will need to modify the file:app/code/core/Mage/Checkout/Model/Cart.php (Note: If you are planning to upgrade your Magento setup, copy this file to local & modify.)
Here we need to add some code to the function updateItems(), such a way that the function should now look like below:

public function updateItems($data) {
Mage::dispatchEvent('checkout_cart_update_items_before', array('cart'=>$this, 'info'=>$data));
 foreach ($data as $itemId => $itemInfo) {
     $item = $this->getQuote()->getItemById($itemId);
     if (!$item) {
     if (!empty($itemInfo['remove']) || (isset($itemInfo['qty']) && $itemInfo['qty']=='0')) {
     $qty = isset($itemInfo['qty']) ? (float) $itemInfo['qty'] : false;
     if ($qty > 0) {
     /* Start: Custom code added for comments */
     if(!empty($itemInfo['comments'])) {
        $write = Mage::getSingleton('core/resource')->getConnection('core_write');
        # make the frame_queue active
    $query = "UPDATE `sales_flat_quote_item` SET itemcomment = '".$itemInfo['comments']."' where item_id = $itemId"; $write->query($query);
     /* End: Custom code added for comments */
 Mage::dispatchEvent('checkout_cart_update_items_after', array('cart'=>$this, 'info'=>$data));
 return $this;

Showing the comment in Admin -> View Order
Add a new function getItemcomment() to the file below:

If you are on verstion 1.5 or later.. add it to the file below.

public function getItemcomment($item) {
    $itemId = $item->getId();
    $write = Mage::getSingleton('core/resource')->getConnection('core_write');
    $query = "SELECT q.* FROM `sales_flat_order_item` o LEFT JOIN `sales_flat_quote_item` q on o.quote_item_id = q.item_id WHERE o.item_id = $itemId";
    # For older versions of Magento
    /* $query = "SELECT q.* FROM `sales_order_entity_int` o LEFT JOIN `sales_flat_quote_item` q on o.value = q.entity_id WHERE o.entity_id = $itemId AND o.attribute_id = 343"; */      
    $res = $write->query($query);
    while ($row = $res->fetch() ) {
        if(key_exists('itemcomment',$row)) {
            echo nl2br($row['itemcomment']);

To add the comments column to the items edit the .phtml file below:

Add header for items:

<th><?php echo $this->helper('sales')->__('Comments') ?></th> 

To add Column with comments edit the .phtml file below:
Add a column for item comments.

<td><?php echo $this->getItemcomment($_item) ?></td> <!-- New column added for item comments -->

There's a free extension that you should take a look at: http://www.magentocommerce.com/magento-connect/magemaven-ordercomment.html


I have found the solution from this link

Creating Custom option and prize to just added product to cart using observer. It might help you out.

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