Problem:
The user has many-to-many relationship. He has a view to search inside the child post type with a relationship filters. He wants to exclude the children of a specific parent.

Solution:
Toolset views search for relationships first, then it passes the results in the post__in argument of the view's underlying WP_Query. We can search for the children of the specific parent, then exclude them from the results of the relationship.

Check the example custom code here https://toolset.com/forums/topic/view-query-filter-exclude-posts-with-specific-parent-id-in-a-post-relationship/#post-2217597

Relevant Documentation:

• https://toolset.com/documentation/customizing-sites-using-php/post-relationships-api/#toolset_get_related_posts
• https://toolset.com/documentation/programmer-reference/views-filters/#wpv_filter_query

Problem:

How to setup content template for single post of custom post type.

Solution:

You can follow our document to setup the content template:

Relevant Documentation:

https://toolset.com/course-lesson/creating-templates-to-display-custom-posts/