Add checkbox to product inventory tab in WooCommerce and have the checkbox checked by default - wordpress

Question

I got this snippet in here to add checkbox custom field which is auto set and it’s working fine.
// Displaying quantity setting fields on admin product pages
add_action( 'woocommerce_product_options_pricing', 'add_custom_field_product_options_pricing' );
function add_custom_field_product_options_pricing() {
global $product_object;
echo '</div><div class="options_group">';
$values = $product_object->get_meta('_cutom_meta_key');
woocommerce_wp_checkbox( array( // Checkbox.
'id' => '_cutom_meta_key',
'label' => __( 'Custom label', 'woocommerce' ),
'value' => empty($values) ? 'yes' : $values,
'description' => __( 'Enable this to make something.', 'woocommerce' ),
) );
}
// Save quantity setting fields values
add_action( 'woocommerce_admin_process_product_object', 'save_custom_field_product_options_pricing' );
function save_custom_field_product_options_pricing( $product ) {
$product->update_meta_data( '_cutom_meta_key', isset($_POST['_cutom_meta_key']) ? 'yes' : 'no');
}
My question: how to move this checkbox to be on the inventory tab and have the checkbox checked by default?
I’ve tried changing :
add_action( 'woocommerce_product_options_pricing', 'add_custom_field_product_options_pricing' );
to:
add_action( 'woocommerce_product_options_inventory_product_data', 'add_custom_field_product_options_pricing' );
AND
add_action( 'woocommerce_admin_process_product_object', 'save_custom_field_product_options_pricing' );
to:
add_action( 'woocommerce_process_product_meta', 'save_custom_field_product_options_pricing' );
But to no avail. Any advice?

Answer 1

woocommerce_admin_process_product_object replaces the outdated woocommerce_process_product_meta hook so you should definitely not replace it with it
To have the checkbox checked by default you can add value to the args from woocommerce_wp_checkbox()
So you get:
// Add checkbox
function action_woocommerce_product_options_inventory_product_data() {
global $product_object;
// Get meta
$value = $product_object->get_meta( '_cutom_meta_key' );
// Checkbox
woocommerce_wp_checkbox( array(
'id' => '_cutom_meta_key', // Required, it's the meta_key for storing the value (is checked or not)
'label' => __( 'Custom label', 'woocommerce' ), // Text in the editor label
'desc_tip' => false, // true or false, show description directly or as tooltip
'description' => __( 'Enable this to make something', 'woocommerce' ), // Provide something useful here
'value' => empty( $value ) ? 'yes' : $value // Checked by default
) );
}
add_action( 'woocommerce_product_options_inventory_product_data', 'action_woocommerce_product_options_inventory_product_data', 10, 0 );
// Save Field
function action_woocommerce_admin_process_product_object( $product ) {
// Update meta
$product->update_meta_data( '_cutom_meta_key', isset( $_POST['_cutom_meta_key'] ) ? 'yes' : 'no' );
}
add_action( 'woocommerce_admin_process_product_object', 'action_woocommerce_admin_process_product_object', 10, 1 );