Add custom select field with validation to WooCommerce checkout page if certain products are in cart

Question

I wish to add a custom select field with validation to the WooCommerce checkout page if certain products are in cart.

With my current code I retrieve the value of my custom WooCommerce form field. However, it display "array" at the order page.

I have an select field which have an option of 1 and 0. Upon selection of the select field, i want it to display either 1 or 0 at the order page but im unable to do so.

Please guide me on what should i do with my current codes:

//AMBASSADOR CUSTOM CHECKOUT FIELDS, CONTENT add marketplace for sameday TEST
add_action( 'woocommerce_after_checkout_billing_form', 'aym_custom_checkout_field' );
function aym_custom_checkout_field( $checkout ) {
     //Check if Product in Cart
     $prod_in_cart_17563 = aym_is_conditional_product_in_cart_17563( 212 );
     if ( $prod_in_cart_17563 === true ) {
    $domain  = 'wocommerce';
    $default = 'Y';

         woocommerce_form_field( '_my_field_name', array(
         'type'  => 'select',
         'class' => array( 'form-row-wide' ),
         'label' => __( 'Market Place - Please Select Y to complete this order' ),
        'required'    => true,
         'options' => array(
            'Y' => __('1'),
            'N' => __('0')
        ),'default' => $default), 

$checkout->get_value( '_my_field_name' ) );
     }
}

//AMBSSADOR BUNDLE add marketplace for same day pa rt 2
function aym_is_conditional_product_in_cart_17563( $product_id ) {
 //Check to see if user has product in cart
 global $woocommerce;

 //flag no product in cart
 $prod_in_cart_17563 = false;

 foreach ( $woocommerce->cart->get_cart() as $cart_item_key => $values ) {
     $_product = $values['data'];

     if ( $_product->id === $product_id ) {
         //product is in cart!
         $prod_in_cart_17563 = true;

     }
 }

 return $prod_in_cart_17563;
}

//process orders in order page

// Custom checkout fields validation
add_action( 'woocommerce_checkout_process', 'custom_checkout_field_process' );
function custom_checkout_field_process() {
    if ( isset($_POST['_my_field_name']) && empty($_POST['_my_field_name']) )
        wc_add_notice( __( 'Please fill in "My 1st new field".' ), 'error' );
}

// Save custom checkout fields the data to the order
add_action( 'woocommerce_checkout_create_order', 'custom_checkout_field_update_meta', 10, 2 );
function custom_checkout_field_update_meta( $order, $data ){
    if( isset($_POST['_my_field_name']) && ! empty($_POST['_my_field_name']) )
        $order->update_meta_data( '_my_field_name', sanitize_text_field( $_POST['_my_field_name'] ) );
}

/**
 * Update the order meta with field value
 **/
add_action('woocommerce_checkout_update_order_meta', 'my_custom_checkout_field_update_order_meta');

function my_custom_checkout_field_update_order_meta( $order_id ) {
    if ($_POST['_my_field_name']) update_post_meta( $order_id, 'My Field', esc_attr($_POST['_my_field_name']));
}


// View fields in Edit Order Page
add_action( 'woocommerce_admin_order_data_after_billing_address', 'display_custom_fields_value_admin_order', 10, 1 );
function display_custom_fields_value_admin_order( $order ){
    // Display the delivery option
    if( $delivery_option =  $order->get_meta('_my_field_name') )
        echo '<p><strong>'.__('Delivery type').':</strong> ' . $delivery_option . '</p>';

}

// Display field value on the order edit page
add_action( 'woocommerce_admin_order_data_after_billing_address', 'my_custom_checkout_field_display_admin_order_meta', 10, 1 );

function my_custom_checkout_field_display_admin_order_meta( $order ) {
    if( $selectoption = $order->get_meta('_my_field_name') ) {
        //$value = wc_get_hearaboutus_options()[$selectoptions];
        $meta= get_post_meta( $post->ID, $selectoption, true );
        $myvalues = unserialize( $meta );
         echo '<p><strong>'.__('Market_Place').':</strong> ' . $myvalues . '</p>';

       
    }
}

7uc1f3r 7uc1f3r · Accepted Answer · 2020-11-10T11:37:48

I have partly rewritten / modified your code with some (extra) features

The ability to check for multiple product IDs in the shopping cart
The custom field is only added if a certain product id is in the shopping cart
The possibility to check out if the custom field is not present (product ID is NOT in cart)
No possibility to checkout as long as the value 'Y' is not selected from the custom select menu (Product ID is IN cart)
Explanation via comment tags added in the code

// Add custom 'select' field after checkout billing form (if product ID is in cart) 
function action_woocommerce_after_checkout_billing_form( $checkout ) {
    // Check if Product in Cart
    // Multiple product IDs can be entered, separated by a comma
    $product_in_cart = is_product_in_cart( array( 212, 30, 815 ) );
    
    // True
    if ( $product_in_cart ) {
        $domain  = 'woocommerce';
        $default = 'Y';

        woocommerce_form_field( '_my_field_name', array(
            'type'      => 'select',
            'class'     => array( 'form-row-wide' ),
            'label'     => __( 'Market Place - Please Select Y to complete this order', $domain ),
            'required'  => true,
            'options'   => array(
                'Y' => __( 'Y', $domain ),
                'N' => __( 'N', $domain ),
            ),
            'default'   => $default,
        ), $checkout->get_value( '_my_field_name' ) );
     }
}
add_action( 'woocommerce_after_checkout_billing_form', 'action_woocommerce_after_checkout_billing_form', 10, 1 );

// Function to check if a certain product ID is in cart
function is_product_in_cart( $targeted_ids ) {
    // Flag no product in cart
    $flag = false;
    
    // WC Cart NOT null
    if ( ! is_null( WC()->cart ) ) {
        // Loop through cart items
        foreach( WC()->cart->get_cart() as $cart_item ) {
            // Check cart item for defined product Ids
            if ( in_array( $cart_item['product_id'], $targeted_ids ) ) {
                // Product is in cart
                $flag = true;
                
                // Break loop
                break;
            }
        }
    }

    return $flag;
}

// Custom checkout 'select' field validation
function action_woocommerce_checkout_process() {
    // Isset    
    if ( isset( $_POST['_my_field_name'] ) ) {
        $domain = 'woocommerce';
        $my_field_name = $_POST['_my_field_name'];
        
        // Empty
        if ( empty ( $my_field_name ) ) {
            wc_add_notice( __( 'Please Select Y to complete this order', $domain ), 'error' );
        }
        
        // NOT empty but value is 'N'
        if ( ! empty ( $my_field_name ) && $my_field_name == 'N' ) {
            wc_add_notice( __( 'Please Select Y to complete this order', $domain ), 'error' );
        }       
    }
}
add_action( 'woocommerce_checkout_process', 'action_woocommerce_checkout_process', 10, 0 );

// Save custom checkout 'select' field
function action_woocommerce_checkout_create_order( $order, $data ) {
    // Isset    
    if ( isset( $_POST['_my_field_name'] ) ) {
        $my_field_name = $_POST['_my_field_name'];
    
        // NOT empty & equal to 'Y'
        if ( ! empty( $my_field_name ) && $my_field_name == 'Y' ) {
            $order->update_meta_data( '_my_field_name', sanitize_text_field( $my_field_name ) );
        }
    } 
}
add_action( 'woocommerce_checkout_create_order', 'action_woocommerce_checkout_create_order', 10, 2 );

// Display the custom 'select' field value on admin order pages after billing adress
function action_woocommerce_admin_order_data_after_billing_address( $order ) {
    $domain = 'woocommerce';
    
    // Get meta
    $my_field_name = $order->get_meta( '_my_field_name' );
    
    // NOT empty
    if ( ! empty ( $my_field_name ) ) {
        echo '<p><strong>' . __( 'Delivery type', $domain ) . ':</strong> ' . $order->get_meta( '_my_field_name' ) . '</p>';
    }
}
add_action( 'woocommerce_admin_order_data_after_billing_address', 'action_woocommerce_admin_order_data_after_billing_address', 10, 1 );

// Display the custom 'select' field value on 'order received' and 'order view' pages (frontend)
function action_woocommerce_order_details_after_order_table( $order ) {
    $domain = 'woocommerce';
    
    // Get meta
    $my_field_name = $order->get_meta( '_my_field_name' );
    
    // NOT empty
    if ( ! empty ( $my_field_name ) ) {
        echo '<p><strong>' . __( 'Delivery type', $domain ) . ':</strong> ' . $order->get_meta( '_my_field_name' ) . '</p>';
    }
}
add_action( 'woocommerce_order_details_after_order_table', 'action_woocommerce_order_details_after_order_table', 10, 1 );

Add custom select field with validation to WooCommerce checkout page if certain products are in cart

1 Answers