Views plugin provides an API, making it easy to display Views output using PHP.
When you ask for help or report issues, make sure to tell us all related information about your View and the data that you want to display using the Views API.
Problem:
The customer asked how to include checks and filters to see whether some different types of post-relationships and custom taxonomies are set with a post or not.
Solution:
Guided to use select type (yes/no) custom field for each of the post-relationship and custom taxonomy to track the assignment and keep their values up-to-date, whenever a post is created/edited.