Dynamically add message based on another field value

• beamkiller

• January 31, 2023 at 5:11 pm

Hi,

I am trying to dynamically populate a Message field based on another field in a Repeater.
But I always get white screen with my code, the_row(): is added.
The debug info says
PHP Fatal error: Allowed memory size of 536870912 bytes exhausted (tried to allocate 20480 bytes) in /home/xxxx/webapps/xxx/wp-includes/class-wp-list-util.php on line 134

This works:

function cban_shortcode_disable_field($field) {
    $field['disabled'] = false;
    //$field['readonly'] = true;
    $field['message'] = 'ALMA';

    print_r($field);

    return $field;
}
add_filter('acf/load_field/name=canb_shortcode', 'cban_shortcode_disable_field',20,1);

But if I try to load the message dynamically I got white screen:

add_filter('acf/load_field/name=canb_shortcode', 'canb_shortcode_load_field');

function canb_shortcode_load_field($field){

    
    // if has rows
    if( have_rows('canb_notification_bars', 'option') ) :
        // while has rows
        while( have_rows('canb_notification_bars', 'option') ) : the_row();
            
            /* Get the name from the Notification bar name field */
            $canb_name = get_sub_field('canb_notification_bar_name','option');
            $canb_name = sanitize_title_with_dashes( $canb_name );
            
            $field['message'] = $canb_name;

        endwhile;

    endif;

return $field;

}

Can someone point me in the right direction?

I have tried to use Example 2 from this page:
https://www.advancedcustomfields.com/resources/dynamically-populate-a-select-fields-choices/

I want to create a small plugin and in the message I would like to display a shortcode variable which the user can use to embed the notification bar.

Thanks.
Regards,
Peter.

• John Huebner

• February 3, 2023 at 10:39 am

remove ‘option’ from here
this

$canb_name = get_sub_field('canb_notification_bar_name','option');

should be

$canb_name = get_sub_field('canb_notification_bar_name');

I’m not sure that is causing your error, but that’s the only thing I can see wrong. For some reason your code is causing an infinite loop.

Also, you should be using the acf/prepare_field hook to modify the field message. While acf/load_field can be used here it can have unintended side effects.