Get the ordered product size and color in order items admin grid in Magento 1.9.2 - magento

Question

I am showing a list of items ordered from all the orders from 'sales_flat_order_item table' in Magneto 1.9.2. I get the name, SKU, and all other values from the following collection.
protected function _prepareCollection() {
$collection = Mage::getModel('sales/order_item')->getCollection();
$collection->getSelect()->join(array('o' => 'sales_flat_order'), 'main_table.order_id = o.entity_id', array('increment_id','created_at'));
$this->setCollection($collection);
parent::_prepareCollection();
return $this;
}
Now I want to get the size and color of the item ordered. I am new to Magento, so I have no clue where I can get these values from.

Answer 1

You can access them in sales_flat_order_item table collection.
$data = $collection->getData();
$optionsData = unserialize($data['product_options']);
echo "<pre>";print_r($optionsData);
// check the [attributes_info] for the custom options
The data in product_options is serialized, so if you unserialize it you end up with something like below :
Array
(
[info_buyRequest] => Array
(
[uenc] => aHR0cDovLzUwLjU2LjIxMy4xNTcvbWVuL3RlZXMta25pdHMtYW5kLXBvbG9zL2NoZWxzZWEtdGVlLTUxNC5odG1sP29wdGlvbnM9Y2FydA,,
[product] => 409
[related_product] =>
[super_attribute] => Array
(
[92] => 20
[180] => 80
)
[qty] => 6
[return_url] =>
)
[attributes_info] => Array
(
[0] => Array
(
[label] => Color
[value] => Black
)
[1] => Array
(
[label] => Size
[value] => S
)
)
[simple_name] => Chelsea Tee
[simple_sku] => mtk004
[product_calculations] => 1
[shipment_type] => 0
[giftcard_lifetime] =>
[giftcard_is_redeemable] => 0
[giftcard_email_template] =>
[giftcard_type] =>
)