How to set a custom option of type "file" when adding a product to the cart in Magento?

cart, file, magento

Solution

Ok finally figured this out. The params array needs special entry to tell the custom option with the key "options_xx_file_action" what to do with a file ('save_new' or 'save_old'). This would look like:

$params = array(
    'product'       => $productId,
    'qty'           => $quantity,
    'options'       => array(
        $customOptionSize->getId()  => $selectedSize,
        $customOptionColor->getId() => $selectedColor,
    ),
    'options_'.$customOptionDesign->getId().'_file_action'=>'save_new',
);

Obviously, you will need to add the file to the post request (via form or therelike). The name of the file should be "options_xx_file". For example, in my case my $_FILES looked like:

Array (
[options_108_file] => Array
    (
        [name] => i-like.png
        [type] => application/octet-stream
        [tmp_name] => C:\xampp\tmp\phpAAB8.tmp
        [error] => 0
        [size] => 6369
    )

)

Problem

Using my own controller, I'm adding a product to the Magento cart. It has 3 custom options: 2 dropdown options (color and size) and a file option (design). The code adding the product to the cart is ``` // obtain the shopping cart $cart = Mage::getSingleton('checkout/cart'); // load the product $product = Mage::getModel('catalog/product') ->load($productId); // do some magic to obtain the select ids for color and size ($selectedSize and $selectedColor) // ... // define the buy request params $params = array( 'product' => $productId, 'qty' => $quantity, 'options' => array( $customOptionSize->getId() => $selectedSize, $customOptionColor->getId() => $selectedColor, // set the file option, but how? ), ); // add this configuration to cart $cart->addProduct($product, $paramObject); $cart->save(); // set the cart as updated Mage::getSingleton('checkout/session')->setCartWasUpdated(true); ``` My question is: How do I attach a certain file to the design option? The file has already been transferred to the server side (actually via the request). I could, however, fake uploading if this would be required. But until now I have not found a single source of information on setting file custom options... My best guess from a tour through the Magento sources, is that the buy request needs some additional data (not in the options, but in the params object), like: option_123_file => something, but what exactly is needed I did not figure out yet. This part of the Magento sources is rather, uhh, not so straight forward. Thanks for any help.

Original source