register-taxonomy

However, for my taxonomy the links do not have the post_type argument Yes, and it’s because that argument does not exist in your submenu slug or relative URL (the 5th parameter for add_submenu_page()), therefore WordPress would not know that you’re targeting your post type, and WordPress also would not add that argument to the links … Read more

When you query attachments, you have to take care about the post_status argument that have a different meaning than for other post types. Attachments have the status of inherit which means that there status should be the same as their parent post (ie the post from where they have been uploaded). This makes attachments associated … Read more