This is How to Add a Custom Checkout Multi-Select Field and Update Order Meta in WooCommerce
One of the most common requests from WooCommerce store owners is the ability to add custom fields to the checkout process. This can be particularly useful when you need to collect additional information from customers, such as their preferences, options, or other details relevant to the order.
In this blog post, we'll cover the step-by-step process of creating a custom multi-select checkout field in WooCommerce and saving the selected values in the order meta data. This is the correct way to implement this functionality, and it includes all the necessary jQuery code to make it work seamlessly.
How to Add a Custom Checkout Multi-Select Field in WooCommerce
To add a custom multi-select checkout field in WooCommerce, follow these steps:
- Add the Custom Checkout Field:
add_filter( 'woocommerce_checkout_fields' , 'custom_checkout_fields', 30, 1 );
function custom_checkout_fields ( $fields ) {
$domain = 'woocommerce';
$fields['billing']['multi_my_field'] = array(
'label' => __('My Field', 'woocommerce'),
'required' => true,
'class' => array('form-row-wide'),
'clear' => true,
'autocomplete' => false,
'type' => 'select',
'options' => array(
'key1' => __('First Item', $domain),
'key2' => __('Second Item', $domain),
'key3' => __('Third Item', $domain),
'key4' => __('Fourth Item', $domain),
),
);
return $fields;
}
In this code, we're using the woocommerce_checkout_fields
filter to add a new field to the billing
section of the checkout form. The field is named multi_my_field
and is set as a multi-select with the type
parameter set to 'select'
. We also provide the available options for the field.
- Add a Hidden Input Field:
<input type="hidden" name="billing_my_field" id="billing_my_field" value="0">
We're adding a hidden input field named billing_my_field
to hold the selected values from the multi-select field. This will be used to save the data in the order meta.
- Add the jQuery Code:
<script type='text/javascript'>
jQuery(function($){
var a = 'select[name="multi_my_field"]',
b = 'input[name="billing_my_field"]';
$(a).attr('multiple', 'multiple');
$(a).change( function(){
$(b).val($(this).val());
})
});
</script>
This jQuery code does two things:
a. It sets the select
element with the name 'multi_my_field'
to be a multi-select by adding the 'multiple'
attribute.
b. It listens for the 'change'
event on the multi-select field and updates the value of the hidden 'billing_my_field'
input field with the selected values.
Saving the Custom Field Data in the Order Meta
Now that we have the custom multi-select field added to the checkout, we need to save the selected values in the order meta data. We can do this by hooking into the woocommerce_checkout_update_order_meta
action, as shown in the code below:
add_action( 'woocommerce_checkout_update_order_meta', 'hidden_checkout_field_update_order_meta', 30, 1 );
function hidden_checkout_field_update_order_meta ( $order_id ) {
if( isset( $_POST['billing_my_field'] ) )
update_post_meta($order_id, '_billing_my_field', esc_attr( $_POST['billing_my_field'] ) );
}
In this code, we're hooking into the 'woocommerce_checkout_update_order_meta'
action, which is triggered when an order is placed. We then check if the 'billing_my_field'
POST variable is set (which it will be if the customer has selected values in the multi-select field), and we use the update_post_meta()
function to save the selected values in the order meta with the key '_billing_my_field'
.
Conclusion
By following the steps outlined in this blog post, you can easily add a custom multi-select checkout field to your WooCommerce store and save the selected values in the order meta data. This is a great way to collect additional information from your customers and use it to enhance the overall shopping experience and order fulfillment process.
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