Scenario: The post “Jimmy” is related to “Jimmy’s Masterpiece Project” with a many:many relationship.
“Jimmy’s Masterpiece Project” has a bunch of comments. I want to show the comments on “Jimmy’s Masterpiece Project” on the post “Jimmy.”
In other words, I want to pull in the posted from the RELATED post.
So, if somebody posts a comment on url.com/jimmys-masterpiece that some comment will be pulled into url.com/jimmy.
Is this possible?
See get_comments(), WP_Comment_Query and pre_get_comments
Basically what you need to do here is to create a pre_get_comments filter that adds the post ID’s for related posts to the “post_in” argument of the comment query.