Meta Box

@DustinD: Your issue looks different from other ones. The fields are removed from the field group. You may double-click on the Update button of the field group and the fields are lost. If the issue happens with other field groups, please share your site credentials here https://metabox.io/contact/
I will take a look.
Note: we do not support older versions of MB plugins.

@Kara: Please try to bypass the sanitization of the field and add only text to the field, save the post and check the issue again. Following the documentation https://docs.metabox.io/sanitization/

Hello,

What is the translation plugin you use to translate the text? I use WPML to translate it and it works as well on my demo site.

Hello Brent,

In your case, Meta Box helps you to create custom post types and you can create more articles under that post type, like the Post of WordPress. You will need to use other plugins or custom code to show them in the frontend, search, filter, optimization ...
Instead of creating everything from scratch, you can use some Knowledge Base plugins and focus only on building content, output arciles in the fronted is easier.
https://www.wpbeginner.com/showcase/best-knowledge-base-plugins-for-wordpress-compared/

Hello Luigi,

Do you mean prevent changes in the field group? If yes, there isn't an option to do that. Any administrator can edit a field group. If you don't want a user editing a field group, please set them as Editor.

Hello Phil,

I think it is possible. You will need to register the relationship by code to use the select field and some jQuery code to pre-select the dropdown value. For example:

Code to register the relationship:

MB_Relationships_API::register( [
    'id'   => 'tramp_detail_to_tramp_log',
    'from' => [
        'object_type'  => 'post',
        'post_type'    => 'tramp-detail',   
        'field' => [
            'field_type' => 'select',
        ]
    ],
    'to'   => [
        'object_type'  => 'post',
        'post_type'    => 'tramp-log',        
        'field' => [
            'field_type' => 'select',
        ]
    ],
] );

jQuery code:

jQuery(document).ready(function($) {
    //get the ID from the URL and assign it to "value"
    $('#tramp_detail_to_tramp_log_to option[value=123]').attr('selected', 'selected');     
});

you can change tramp_detail_to_tramp_log_to to tramp_detail_to_tramp_log_from depending on the relationship side.

Note: the code is for example. If you cannot complete the task, please contact an expert developer to help you in this case.

Hello,

The relationship injects the relationship parameter to the WP Query of WordPress and its data from a custom table so I think it won't affect the performance significantly. You can try using a caching plugin to cache the query like WP Rocket or Redis Object Cache to prevent high consumption on your site.

Let me know how it goes.

Hello,

Regarding the nested condition, the development team is still working on this issue and it looks more complicated. Hopefully, it will be fixed soon.

Thank you.