Reply To: ACF Blocks – Need stable id

• kasbrahan

• October 7, 2022 at 5:13 pm

I can into the same problem with the suggested solution from ACF. But further research showed that only attributes set directly in the $block scope are reset. Setting it in $block[‘data’] makes it persistent

function mypre_add_anchor_to_blocks( $attributes ) {

	error_log('attributes');
	error_log( print_r( $attributes, true ) );

    if( !isset($attributes['data']['customvalue']) || empty($attributes['data']['anchor']) ) {
        $attributes['data']['customvalue'] = 'block-' . uniqid();
    }
    return $attributes;
}
add_filter('acf/pre_save_block', 'mypre_add_anchor_to_blocks');

Notice – on first save of the page you need to reload the admin page with the editor to make the block include the new attribute.