• rudtek

• March 12, 2021 at 8:14 am

Yeah, I guess I could have been more clear on that. I got it to work this way:

function populate_cpt_titles( $form ) {
	foreach ( $form['fields'] as $field ) {
		if ( $field->type != 'select' || strpos( $field->cssClass, 'populate_al_products' ) === false ) {
	    		continue;
		}

		$field->placeholder = 'Select an your product';

		$args = [
			'posts_per_page'   => -1,
			'order'            => 'ASC',
			'orderby'          => 'post_title',
			'post_type'        => 'al_product', 
			'post_status'      => 'publish',
		];
		$custom_posts = get_posts( $args );

		$options = [];
		foreach( $custom_posts as $custom_post ) {
			$options[] = ['text' => $custom_post->post_title, 'value' => $custom_post->post_title];

            $subfields = get_field('product_variations', $custom_post->ID);
			if ($subfields) {
                foreach ($subfields as $subfield) {
                    $options[] = ['text' => $subfield['part_number'], 'value' => $subfield['part_number'] ];
                }
            }
		}

		$field->choices = $options;
	}
	return $form;
}