Well - could you please share problem URL where you added your view and access details so I can check how you configure your view to display the content with your desired author sort order.
*** Please make a FULL BACKUP of your database and website.***
I would also eventually need to request temporary access (WP-Admin and FTP) to your site. Preferably to a test site where the problem has been replicated if possible in order to be of better help and check if some configurations might need to be changed.
I would additionally need your permission to de- and re-activate Plugins and the Theme, and to change configurations on the site. This is also a reason the backup is really important. If you agree to this, please use the form fields I have enabled below to provide temporary access details (wp-admin and FTP).
I have set the next reply to private which means only you and I have access to it.
Custom field "Author sort order" is registered to Intermediary Post type "auteur-tijdschrifart", but you are using view to query posts of post type "Author", there aren't "Author sort order" fields in "Author" posts, so it conduct the problem: "No item found"
I have done below modifications in your website:
1) Edit he post type "auteur-tijdschrifart", enable the option "openbaar_zoekbaar". hidden link
2) Edit the view "article-authors-new" hidden link
- in section "Inhoudselectie", choose post type "Auteurs Tijdschriftartikelen Intermediary Posts"
- in section "Query Filter", change the filter to:
Select posts in a Auteurs Tijdschriftartikelen relationship that are related to the Post where this View is shown.
- in section "Loop Editor", use below shortcode to display the "Author" post title:
[wpv-post-title item="@auteur-tijdschrifartikel.parent"]
I cannot follow axactly what you did to everything but maybe I don't have to...
Is there a tutorial about this somewhere on the website that I can follow to learn more about this?
Another question is this:
The intermediary post type "Auteurs Tijdschriftartikelen Intermediary Posts" is only needed as the connection and the connection is automatically made when we add authors to the article post type right?
But now this intermediary post type is listed in the wordpress left menu in the backend. Is it possible to hide it from there? Or is there any reason why not to hide it?
And you can hide it from wordpress left menu in the backend: hidden link
Edit the Intermediary Post type "auteur-tijdschrifart", in section "Options", disable option "show_ui"