Notice: Undefined index: ID

• paulmist

• April 7, 2020 at 5:24 pm

I’ve been contributing to the add-on ‘ACF Flexible Content Preview’.

I’ve made some adjustments so that the pluging is able to access nested flexible content fields.

It works as expected but gives an error in the WordPress Admin:

Notice: Undefined index: ID in /wp-content/plugins/advanced-custom-fields-pro/includes/acf-field-functions.php on line 361

The code causing the issue is:

foreach ( $fields as $field ) {
    if ( 'flexible_content' === $field['type'] ) {
// Flexible is recursive structure with sub_fields into layouts
        foreach ( $field['layouts'] as $layout_field ) {

            if ( ! empty( $keys [ $layout_field['key'] ] ) ) {
                continue;
            }
            $keys[ $layout_field['key'] ] = $layout_field['name'];
PROBLEM >>> $sub_fields = (array) acf_get_fields($layout_field);

            foreach($sub_fields as $sub_field){
                if('flexible_content' === $sub_field['type']){
                    foreach($sub_field['layouts'] as $layout_sub_field){
                        if ( ! empty( $keys [ $layout_sub_field['key'] ] ) ) {
                            continue;
                        }
                        $keys[ $layout_sub_field['key'] ] = $layout_sub_field['name'];
                    }
                }
            }

        }

    }
}

As mentioned – it works like a boss but we’ve got this error… help appreciated