Disable checkout button in cart

Question

I have added an error in the sales_quote_save_before event, if the quantity of items is more than 500.

> Mage::getSingleton('checkout/session')->addError(Mage::helper('checkout')->__('The maximum order qty is %d', 500));

The error appears in the cart, but still I can go further to the checkout and place the order. How can I disable the Proceed to Checkout button?

Answer 1

You can disable the checkout button by adding the following to the quote object (in the event your use for your observer sales_quote_save_before):

$quote->setHasError(true);
$quote->addErrorInfo(
    'error',
    'checkout',
    null,
    Mage::helper('checkout')->__('The maximum order qty is %d', 500),
    null
);

This will display the error message in the cart and remove the buttons. This solution is also used by the catalog_inventory module when a product qty is over the available qty.

Answer 2

you could create an if statement that checks the qty is below the required value. The 'Proceed to Checkout' link comes from this file.

  app/design/frontend/base/default/template/checkout/onepage/link.phtml

This question has a lot of details on checking individual product quantities in the cart. https://stackoverflow.com/questions/8296719/magento-get-the-quantity-in-cart-for-a-given-product

Answer 3

If you want something without fiddling with your core code then i think its better to observe the proceed to checkout event ( if you are using onepagechekout that will be <controller_action_predispatch_checkout_onepage_index> ) and then checking if the quantity constraints are not met then you can set the error there and use the below code to reload to cart itself

$url = Mage::getUrl('checkout/cart'); Mage::app()->getResponse()
->setRedirect($url) ->sendResponse();