After a long investigation, it turned out that there isn’t any WordPress method that generates that information via methods/functions. That functionality should be built manually. For example, for the “publish post” metabox which contains the required functionality above, the code is listed here https://core.trac.wordpress.org/browser/tags/4.9/src/wp-admin/includes/meta-boxes.php#L22
$images = rwmb_meta( ‘field-id’, array( ‘size’ => ‘image-size’, ‘limit’ => 1 ) ); $image = reset( $images ); echo $image[‘url’]; reference
solved The rewrite slug of the custom taxonomy was somewhere competing with the corresponding custom post type slug. Afterwards I added a normal loop to the archives.php template. That made the trick.
Featured Gallery to custom post type
Creating a “Related Meta” type field?
SOLVED: I used the premium plugin “Woocommerce Extra Product Options” (https://themehigh.com/product/woocommerce-extra-product-options) Thanks
Issue on Creating Checkbox Field On Custom Post type
The issues with your code In the eca_meta_box_function() function, the selected option is not being selected because the option‘s value is not the post ID which is being used with the selected() function in WordPress: (wrapped for clarity) <option value=”<?php echo $post->ID; ?>_<?php echo preg_replace(‘#[ -]+#’, ‘-‘ ,$post->post_title ); ?>” <!– wrapped –> <?php selected( … Read more
make sure that you have the custom fields option checked in the “screen options”
I ended up using this: <a class=”clear_button hide-if-no-js button-cancel” title=”clear” data-clear style=”text-decoration:underline;”>Clear</a> It does the job. I was hoping for something more “WordPressy” but don’t see a metabox cancel function.