WooCommerce: Validate custom fields on My Account's edit page

Question

I've added custom fields to my WooCommerce registration using this process . I've made them available on the My Account's edit page using these actions:

// added custom fields here
add_action( 'woocommerce_edit_account_form', 'my_woocommerce_edit_account_form' );   

// saved user meta here
add_action( 'woocommerce_save_account_details', 'my_woocommerce_save_account_details' );

In between the two, I need to validate these fields when editing. I tried using the woocommerce_process_myaccount_field_ filter ( as mentioned here ) but that didn't work. The code inside it doesn't trigger when I save the changes.

Any ideas on how can I validate?
Am I using the correct filter?
If yes, why doesn't it trigger?

Thanks.

Answer 1

You could try to use one of this 2 hooks for validating custom fields.

add_action( 'user_profile_update_errors','wooc_validate_custom_field', 10, 1 );

// or

add_action( 'woocommerce_save_account_details_errors','wooc_validate_custom_field', 10, 1 );

// with something like:

function wooc_validate_custom_field( $args )
{
    if ( isset( $_POST['custom_field'] ) ) // Your custom field
    {
        if(strlen($_POST['custom_field'])<4 ) // condition to be adapted
        $args->add( 'error', __( 'Your error message', 'woocommerce' ),'');
    }
}