two post types sharing box and tax

I would assume yes, but that would be something taken care of at the post type registration level, and not at a metabox setup level.

I think you’ll have to register two separate boxes in order to do that. Something like this if you don’t want to duplicate all the field code:

<?php 
add_action( 'cmb2_init', 'yourprefix_register_cpt_metaboxs' );
/**
 * Hook in and add a metabox that only appears on the 'About' page
 */
function yourprefix_register_cpt_metaboxs() {

	$cmb_books = new_cmb2_box( array(
		'id'           => '_yourprefix_book_cpt_metabox',
		'title'        => __( 'Books Metabox', 'cmb2' ),
		'object_types' => array( 'book' ),
		'show_in_rest' => WP_REST_Server::READABLE, // show in REST API
	) );

	yourprefix_register_shared_cpt_fields( $cmb_books );

	$cmb_magazines = new_cmb2_box( array(
		'id'           => '_yourprefix_magazine_cpt_metabox',
		'title'        => __( 'Magazines Metabox', 'cmb2' ),
		'object_types' => array( 'magazine' ),
		'show_in_rest' => false, // No REST API for this cpt
	) );

	yourprefix_register_shared_cpt_fields( $cmb_magazines );
}

function yourprefix_register_shared_cpt_fields( $cmb ) {

	$cmb->add_field( array(
		'name' => __( 'Publisher', 'cmb2' ),
		'desc' => __( 'field description (optional)', 'cmb2' ),
		'id'   => '_yourprefix_publisher',
		'type' => 'text',
	) );

	// Add other shared fields here.
}

• This reply was modified 6 years, 9 months ago by Justin Sternberg. Reason: fix typo
• This reply was modified 6 years, 9 months ago by Justin Sternberg. Reason: fix another typo

Also what Justin said just now ?? He will know more on the topic than myself at the moment

Thank you!