Topic Tag: Setting up custom fields

Problem:
The customer's theme has a custom field for Taglines, he went to Post Field Control and set it to "manage with types" but the content will not appear on the front-end:
Solution:
The option Manage with types will allow you to use that custom field inside a Toolset custom field group, but it won't automatically link it to the custom field available inside the custom theme or plugin.

Upon further review, that fields was serialized by the theme and placed inside a 'lp_listingpro_options' option. I had to use custom code to retrieve this field. I added it to a shortcode and registered the shortcode within Toolset settings, then the field managed by the theme became available to be used in the front end as well. The shortcode was this:

function my_shortcode_callback( $atts ){    
    // Get the tagline from post_meta
    $myvals = maybe_unserialize(get_post_meta($atts['post_id'], 'lp_listingpro_options'));
    return $myvals[0]["tagline_text"];  
}
add_shortcode( 'tagline_text', 'my_shortcode_callback' );

Relevant Documentation:
https://developer.wordpress.org/reference/functions/get_post_meta/
https://wp-staging.com/serialized-data-wordpress-important/
https://wpengine.com/support/wordpress-serialized-data/
https://deliciousbrains.com/wp-migrate-db-pro/doc/serialized-data/
https://developer.wordpress.org/reference/functions/maybe_serialize/
https://developer.wordpress.org/reference/functions/maybe_unserialize/