The cruxof my issues were a mis-matching class name/product type. I was calling the class WC_Product_Family but using a product type of “wcfp_family_product”.
I refactored the code, adding in the hook for the add_to_cart and was able to get a crude working example:
<?php
/*
Create a Product Type with Custom Settings in WooCommerce
Adding a custom WooCommerce product type
// Example showing a product select drop down menu on the Settings page of the custom product type:
http://stackoverflow.com/questions/30973651/add-product-search-field-in-woo-commerce-product-page
*/
// add a product type
add_filter( 'product_type_selector', 'wcfp_add_family_product_type' );
function wcfp_add_family_product_type( $types ){
$types[ 'familyproduct' ] = __( 'Family Product' );
return $types;
}
add_action( 'plugins_loaded', 'wcfp_create_family_product_type' );
function wcfp_create_family_product_type(){
// declare the product class
class WC_Product_FamilyProduct extends WC_Product{
public function __construct( $product ) {
$this->product_type="familyproduct";
parent::__construct( $product );
// add additional functions here
}
}
}
// add the settings under ‘General’ sub-menu
add_action( 'woocommerce_product_options_general_product_data', 'wcfp_add_custom_settings' );
function wcfp_add_custom_settings() {
global $woocommerce, $post;
echo '<div class="options_group hidden show_if_familyproduct">';
?>
<p class="form-field product_field_type">
<label for="familyproduct_ids"><?php _e( 'Component Products:', 'woocommerce' ); ?></label>
<input type="hidden" class="wc-product-search" style="width: 50%;" id="familyproduct_ids" name="familyproduct_ids" data-placeholder="<?php esc_attr_e( 'Search for a product…', 'woocommerce' ); ?>" data-action="woocommerce_json_search_products" data-multiple="true" data-exclude="<?php echo intval( $post->ID ); ?>" data-selected="<?php
$product_ids = array_filter( array_map( 'absint', (array) get_post_meta( $post->ID, '_familyproduct_ids', true ) ) );
$json_ids = array();
foreach ( $product_ids as $product_id ) {
$product = wc_get_product( $product_id );
if ( is_object( $product ) ) {
$json_ids[ $product_id ] = wp_kses_post( html_entity_decode( $product->get_formatted_name(), ENT_QUOTES, get_bloginfo( 'charset' ) ) );
}
}
echo esc_attr( json_encode( $json_ids ) );
?>" value="<?php echo implode( ',', array_keys( $json_ids ) ); ?>" /> <?php echo wc_help_tip( __( 'Select component parts to display on the product page.', 'woocommerce' ) ); ?>
</p>
<?php
echo '</div>';
}
add_action( 'woocommerce_process_product_meta', 'wcfp_save_custom_settings' );
function wcfp_save_custom_settings( $post_id ){
//Save the collection of products
$my_product_ids = isset( $_POST['familyproduct_ids'] ) ? array_filter( array_map( 'intval', explode( ',', $_POST['familyproduct_ids'] ) ) ) : array();
update_post_meta( $post_id, '_familyproduct_ids', $my_product_ids );
}
/**
* Add a custom product tab.
*/
function wcfp_custom_product_tabs( $tabs) {
$tabs['rental'] = array(
'label' => __( 'Family', 'woocommerce' ),
'target' => 'family_options',
'class' => array( 'show_if_familyproduct'),
);
return $tabs;
}
//add_filter( 'woocommerce_product_data_tabs', 'wcfp_custom_product_tabs' );
/**
* Hide Attributes data panel.
*/
function wcfp_hide_attributes_data_panel( $tabs) {
// Other default values for 'attribute' are; general, inventory, shipping, linked_product, variations, advanced
//$tabs['general']['class'][] = 'hide_if_familyproduct';
$tabs['inventory']['class'][] = 'hide_if_familyproduct';
$tabs['shipping']['class'][] = 'hide_if_familyproduct';
$tabs['linked_product']['class'][] = 'hide_if_familyproduct';
$tabs['attribute']['class'][] = 'hide_if_familyproduct';
$tabs['advanced']['class'][] = 'hide_if_familyproduct';
return $tabs;
}
//add_filter( 'woocommerce_product_data_tabs', 'wcfp_hide_attributes_data_panel' );
add_action( 'woocommerce_familyproduct_add_to_cart', 'familyproduct_add_to_cart' );
function familyproduct_add_to_cart() {
echo 'MY CUSTOM ADD TO CART HOOK';
die();
}