Magento adding a bundled product to cart with 'bundle_option'? - php

Question

I can't seem to find anywhere documentation of the 'bundle_option' field in the product options array, when adding a bundled product to the cart programatically in Magento. So I can't be sure how to do this correctly.
But this is my attempt:
$json_obj = json_decode($json_string, true);
//define cart
$cart = Mage::getSingleton('checkout/cart');
$bundle = array();
$bundle_qty = array();
for ($i=0; $i<count($json_obj['basket']['products']); $i++) {
$product_id = int($json_obj['basket']['products'][$i]['id']);
#add individual products to cart
#$product = new Mage_Catalog_Model_Product();
#$product->load($product_id);
#$params = array('product'=>$product_id,'qty'=>1);
#if ($product->getName()) $cart->addProduct($product, $params);
#add products to bundle
$bundle[$i] = $product_id;
if (isset($bundle_qty[$product_id])) $bundle_qty[$product_id] += (int)1;
else $bundle_qty[$product_id] = (int)1;
}
#add to bundled product to cart
$product = new Mage_Catalog_Model_Product();
$product->load(833); #833 = test bundle
$cart->addProduct($product, array('product'=>833,
'qty'=>min(1,int($json_obj['basket']['quantity'])),
'bundle_option'=>$bundle,
'bundle_option_qty'=>$bundle_qty));
$cart->save();
Mage::getSingleton('checkout/session')->setCartWasUpdated(true);
$message = $this->__('Notice: %s item(s) were successfully added to your shopping cart.', $i);
Mage::getSingleton('checkout/session')->addSuccess($message);
}
So the commented out code is adding products individually which works correctly. Now I'm trying to add the products to a 'Test Bundle' product instead.
What I'm now doing in the loop is compiling the arrays for 'bundle_option' and 'bundle_option_qty' fields. Once the loop has finished I'm adding the bundle product (ID:833) to the cart with the options array of the bundled items.
The result is that nothing is added to the cart. I've also played around with the code a bit to no success.
Can anyone see where I'm going wrong or if you could point me to a doc/tutorial of the product options parameter that details the bundle_option array (what the indexes are, and what the values are) that would also help?

Answer 1

I had to check the POST variables sent to the cart URL from the front-end to figure this one out.
These were the variables posted for one bundle:
bundle_option[1][] 17
bundle_option[1][] 19
bundle_option_qty[1][17] 1
bundle_option_qty[1][19] 1
product 833
qty 2
related_product
From that I figured out that bundle_option[1] referred to Option 1 in the bundle.
I also figured that the values of the indexes bundle_option[1][0]=17 and bundle_option[1][1]=19 - the 17 and 19 referred to selection_id.
Analysing the form on the front-end revealed my list of selection_id's. I figured that the selection ID's would change once the bundle was altered in Admin>Manage Products so I used a look-up to get the selection IDs rather than hard-coding them in.
The code I ended up with was this:
$json_string = isset($_POST["json"])? $_POST["json"] : null;
if (!is_null($json_string)) {
$json_obj = json_decode($json_string, true);
#define cart
$cart = Mage::getSingleton('checkout/cart');
#look-up bundle selection ids
$bundled_product = new Mage_Catalog_Model_Product();
$bundled_product->load(833); #833 = test bundle
$selectionCollection = $bundled_product->getTypeInstance(true)->getSelectionsCollection(
$bundled_product->getTypeInstance(true)->getOptionsIds($bundled_product), $bundled_product
);
$bundled_items = array();
foreach ($selectionCollection as $option) {
$bundled_items[$option->product_id] = $option->selection_id;
}
#get bundle items, quantities
$bundle = array();
$bundle_qty = array();
for ($i=0; $i<count($json_obj['basket']['products']); $i++) {
$product_id = (int)$json_obj['basket']['products'][$i]['id'];
$selection_id = $bundled_items[$product_id];
if(!in_array($selection_id,$bundle)) array_push($bundle,$selection_id);
if (isset($bundle_qty[$selection_id])) $bundle_qty[$selection_id] += (int)1;
else $bundle_qty[$selection_id] = (int)1;
}
#add to bundled product to cart
$options = array('product'=>833,
'related_product'=>null,
'bundle_option'=>array(1=>$bundle),
'bundle_option_qty'=>array(1=>$bundle_qty),
'qty'=>(int)$json_obj['basket']['quantity']
);
$cart->addProduct($bundled_product, $options);
$cart->save();
Mage::getSingleton('checkout/session')->setCartWasUpdated(true);
$message = $this->__('Notice: %s item(s) were successfully added to your shopping cart.', $i);
Mage::getSingleton('checkout/session')->addSuccess($message);
}
I hope this saves somebody a lot of time!
Edit
Still trying to solve why bundle_option_qty is not setting the quantity (all items are qty:1 added to the bundle product)
Edit 2
It turned out the built-in front-end bundle add-to-cart feature couldn't add multiple quantities of items to the cart either! Looking into the issue I found that the bundle-quantity feature was an extension called Kabel BundlePlus, it probably wasn't installed correctly by the previous developers so I downloaded it again and reinstalled the plugin and now the bundle_option_qty is working in both the frontend and my plugin!