Imagine you have Posts, which can have many Likes. If a user is logged in and has previously liked a post, you want to include that like, though not all likes for that post.
So far, the only way I can think of expressing this through JSON API is:
include: post, post.current_user_like, and then have the API return just the current user’s like as a pseudo-relationship.
I’m curious how other people approach this problem.