Currently, if you set a custom option as required, it will apply a class required-entry to the input or select, and it will be validated with JavaScript.

On occasion, we get an order that is missing required custom options. These customers then have to be manually contacted to get the custom option.

I find when I use inspect element to remove the required-entry class, or delete the input entirely, I can replicate the issue. The customers are likely replicating this issue differently, such as with a certain combination of actions that trip up validation, or simply using a browser that interprets the validation logic differently.

Whatever the case, I would like to validate this logic server side. I see that I can detect this by extending /app/code/core/Mage/Checkout/controllers/CartController.php, either using addAction() for on add or indexAction() for when cart page is visited. I've used $options = $product->getOptions(); to get options, but it doesn't tell me if the option was required, and it seems it doesn't give me options that aren't submitted.

How can I validate required custom options server side?

1 Answer 1


Actually, by default Magento does verify the user input for custom options not only via JS - else your shop would be at huge risk of falling for XSS and what not all.

This validation is happening on multiple levels, for example, for text input at Mage_Catalog_Model_Product_Option_Type_Default::validateUserValue() and Mage_Catalog_Model_Product_Option_Type_Text::validateUserValue() - i.e.

 * Validate user input for option
 * @throws Mage_Core_Exception
 * @param array $values All product option values, i.e. array (option_id => mixed, option_id => mixed...)
 * @return Mage_Catalog_Model_Product_Option_Type_Default
public function validateUserValue($values)


    $option = $this->getOption();
    if (!isset($values[$option->getId()]) && $option->getIsRequire() && !$this->getSkipCheckRequiredOption()) {
        Mage::throwException(Mage::helper('catalog')->__('Please specify the product required option(s).'));
    } elseif (isset($values[$option->getId()])) {
    return $this;

Hover, even if you bypass these checks you may add the item to the quote, however, in cart you then will be see a messages such as "* The product has required options" disallowing you to continue to checkout.

Since this validation seems not to apply to your store I assume you got some third party/custom module installed in your shop that is preventing Magento from running all its validations. This may be related to an extended custom option's based calculation module or something similar.

Now, assuming that it is not possible to change the given logic for what ever reason (even though I highly recommend you to first of all try to figure out why the default server-side validation is not working for you) you can go the most dirty way (since applying a bad workaround on a bug isn't the best thing to do) you could simply do a check in the mentioned addAction() like so:

$options = $product->getOptions();
foreach($options as $option) {
    $optionData = $option->getData();
    if($optionData['is_require']) {
        // ...

Yet, this will just help you at the time of adding the product to cart but not when you update a product from cart.

A better approach (still, not good, but better than above one) is to use observers to check certain conditions when a product is added to cart using the events such as controller_action_predispatch_checkout_cart_add (some similar event might be needed for when the product is updated). Further references on this can be found here:

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