How to add custom stock status to products in WooCommerce 4+

问题

I am using the following code to add new stock statuses in WooCommerce 4.0.

The new statuses are:

• Preorder
• Contact us

function add_custom_stock_type() {
    ?>
    <script type="text/javascript">
    jQuery(function(){
        jQuery('._stock_status_field').not('.custom-stock-status').remove();
    });
    </script>
<?php   

    woocommerce_wp_select( array( 'id' => '_stock_status', 'wrapper_class' => 'custom-stock-status', 'label' => __( 'Stock status', 'woocommerce' ), 'options' => array(
        'instock'     => __( 'Available', 'woocommerce' ), //changed the name
        'outofstock'  => __( 'Sold out', 'woocommerce' ), //changed the name
        'onbackorder' => __( 'Preorder : Pending Distributor release', 'woocommerce' ), //changed the name
        'contact'     => __( 'Contact us for Availability', 'woocommerce' ), //added new one
        'preorder'    => __( 'On Preorder: Pending Distributor release', 'woocommerce' ), //added new one
    ), 'desc_tip' => true, 'description' => __( 'Controls whether or not the product is listed as "in stock" or "out of stock" on the frontend.', 'woocommerce' ) ) );
}
add_action('woocommerce_product_options_stock_status', 'add_custom_stock_type');

function save_custom_stock_status( $product_id ) {
    update_post_meta( $product_id, '_stock_status', wc_clean( $_POST['_stock_status'] ) );
}
add_action('woocommerce_process_product_meta', 'save_custom_stock_status',99,1);

function woo_add_custom_general_fields_save_two( $post_id ){
    // Select
    $woocommerce_select = $_POST['_stock_status'];
    if( !empty( $woocommerce_select ) )
        update_post_meta( $post_id, '_stock_status', esc_attr( $woocommerce_select ) );
    else
    update_post_meta( $post_id, '_stock_status', '' );
    }

function woocommerce_get_custom_availability( $data, $product ) {
    switch( $product->stock_status ) {
        case 'instock':
            $data = array( 'availability' => __( 'Available', 'woocommerce' ), 'class' => 'in-stock' ); //changed name
        break;
        case 'outofstock':
            $data = array( 'availability' => __( 'Sold Out', 'woocommerce' ), 'class' => 'out-of-stock' ); //changed name
        break;
        case 'onbackorder':
            $data = array( 'availability' => __( 'Preorder : Pending Distributor release', 'woocommerce' ), 'class' => 'onbackorder' ); //changed name
        break;
        case 'contact':
            $data = array( 'availability' => __( 'Contact us for Availability', 'woocommerce' ), 'class' => 'contact' ); //added new one
        break;
        case 'preorder':
            $data = array( 'availability' => __( 'On Preorder : Pending Distributor release', 'woocommerce' ), 'class' => 'preorder' ); //added new one
        break;
    }
    return $data;
}
add_action('woocommerce_get_availability', 'woocommerce_get_custom_availability', 10, 4);

---

Works

• Backend: The new status is added in the dropdown menu, I can select the status I want.

Does not work

• Front end: on single product page is not showing the correct status.

• Backend: Display the new status on the admin products list table

Someone who can assist me with this?

回答1:

Use woocommerce_product_stock_status_options

instead of woocommerce_product_options_stock_status.

This way you can immediately add a status instead of replace the existing dropdown

---

Also use woocommerce_get_availability_text & woocommerce_get_availability_class opposite woocommerce_get_availability.

This way you don't have to add the existing statuses again

// Add new stock status options
function filter_woocommerce_product_stock_status_options( $status ) {
    // Add new statuses
    $status['pre_order'] = __( 'Pre order', 'woocommerce' );
    $status['contact_us'] = __( 'Contact us', 'woocommerce' );

    return $status;
}
add_filter( 'woocommerce_product_stock_status_options', 'filter_woocommerce_product_stock_status_options', 10, 1 );

// Availability text
function filter_woocommerce_get_availability_text( $availability, $product ) {
    switch( $product->stock_status ) {
        case 'pre_order':
            $availability = __( 'Pre order', 'woocommerce' );
        break;
        case 'contact_us':
            $availability = __( 'Contact us', 'woocommerce' ); 
        break;
    }
    return $availability; 
}
add_filter( 'woocommerce_get_availability_text', 'filter_woocommerce_get_availability_text', 10, 2 );

// Availability class
function filter_woocommerce_get_availability_class( $class, $product ) {
    switch( $product->stock_status ) {
        case 'pre_order':
            $class = 'pre-order'; 
        break;
        case 'contact_us':
            $class = 'contact-us'; 
        break;
    }

    return $class;
}
add_filter( 'woocommerce_get_availability_class', 'filter_woocommerce_get_availability_class', 10, 2 );

---

---

---

Use woocommerce_admin_stock_html to display the new stock status on the admin products list table

// admin stock html
function filter_woocommerce_admin_stock_html( $stock_html, $product ) {
    switch( $product->stock_status ) {
        case 'pre_order':
            $stock_html = '<mark class="pre-order">' . __( 'Pre order', 'woocommerce' ) . '</mark>'; 
        break;
        case 'contact_us':
            $stock_html = '<mark class="contact-us">' . __( 'Contact us', 'woocommerce' ) . '</mark>';  
        break;
    }


    return $stock_html;
}
add_filter( 'woocommerce_admin_stock_html', 'filter_woocommerce_admin_stock_html', 10, 2 );

来源：https://stackoverflow.com/questions/61796640/how-to-add-custom-stock-status-to-products-in-woocommerce-4