Woocommerce shopping cart column - wordpress

Question

How add custom column to woocommerce shopping cart and then add info of some input from this column to order, checkout page and to email?
Actually i need add friends list from buddypress to each product row(price must depends on how many friends checked).
Here i found suggestion, but it`s partly helpfull WooCommerce: Add input field to every item in cart
wp community also keep silence
http://wordpress.org/support/topic/woocommerce-custom-column-in-cart?replies=1
what i do - its just add list of avalaible friends and no idea how can I save data on update cart or proceed.
if ( bp_has_members( 'user_id=' . bp_loggedin_user_id() ) ){
function ggUserFrom(){
$arrUsers = array();
while ( bp_members() ){
bp_the_member();
$arrUsers[ bp_get_member_user_nicename() ] = bp_get_member_user_nicename();
}
return $arrUsers;
}
echo "<div class='friends-holder'>";
foreach ( ggUserFrom() as $friend ){
echo '<p><input type="checkbox" name="cart['.$cart_item_key.'][friendsfromcart]" value="'.$friend.'">
<span>'.$friend.'</span></p>';
}
echo "</div>";
}
Im seek ANY info about this question.

Answer 1

Here, since user may choose multiple checkboxes, it may contain multiple values. Therefore, we have used "serialize" function.
for example,
add_filter( 'woocommerce_get_cart_item_from_session', 'wdm_get_cart_items_from_session', 1, 3 );
if(!function_exists('wdm_get_cart_items_from_session'))
{
function wdm_get_cart_items_from_session($item,$values,$key)
{
$item['custom_field_name'] = isset( $values['friendsfromcart'] )? serialize($values['friendsfromcart']) : '';
return $item;
}
}
While you are adding Order meta data, you can fetch individual values and add corresponding keys as follows,
add_action('woocommerce_add_order_item_meta','wdm_add_values_to_order_item_meta',1,2);
function wdm_add_values_to_order_item_meta($item_id, $values)
{
$user_custom_values = unserialize($values['friendsfromcart']);
if(count($user_custom_values) > 0)
{
foreach($user_custom_values as $single_value)
{
wc_add_order_item_meta($item_id,ucfirst($single_value),single_value);
}
}
}
since order meta will be sent in E - mail.

Answer 2

Thank for reply and - yes, variable isset in checkout page, but his empty in
var_dump($_POST)...
...[custom_field_name] =>
...
and ofc is empty in email.
Perhaps i incorrect send it ?
name="friendsfromcart"
or send values its a array and must send:
name="friendsfromcart[]"
or
name="[friendsfromcart]"
or need session key
name="cart['.$cart_item_key.'][friendsfromcart]" ?

Answer 3

It works, array in cart but something wrong with unserialize:
add_action( 'init', 'update_cart_action', 9);
function update_cart_action() {
global $woocommerce;
if ( ( ! empty( $_POST['update_cart'] ) || ! empty( $_POST['proceed'] ) ) && $woocommerce->verify_nonce('cart')) {
$cart_totals = isset( $_POST['cart'] ) ? $_POST['cart'] : '';
if ( sizeof( $woocommerce->cart->get_cart() ) > 0 ) {
foreach ( $woocommerce->cart->get_cart() as $cart_item_key => $values ) {
if ( isset( $cart_totals[ $cart_item_key ]['friendsfromcart'] ) ) {
$woocommerce->cart->cart_contents[ $cart_item_key ]['friendsfromcart'] = $cart_totals[ $cart_item_key ]['friendsfromcart'];
}
}
}
}
}
add_filter( 'woocommerce_get_cart_item_from_session', 'wdm_get_cart_items_from_session', 1, 3 );
function wdm_get_cart_items_from_session($item,$values,$key){
$item['friendsfromcart'] = isset( $values['friendsfromcart'] )? serialize($values['friendsfromcart']) : '';
return $item;
}
add_action('woocommerce_add_order_item_meta','wdm_add_values_to_order_item_meta',1,2);
function wdm_add_values_to_order_item_meta($item_id, $values){
$user_custom_values = unserialize($values['friendsfromcart']);
if(count($user_custom_values) > 0){
foreach($user_custom_values as $single_value){
wc_add_order_item_meta($item_id,ucfirst($single_value),single_value);
}
}
}