js执行。erb只有在某些条件为真时才成立

I am not very confident with cofeescript or js so I am a little bit confused. I have a quick editing functionality which sends an AJAX request and updates the database. Currently I'm manually changing the edited place and display it but it looks like a cheat to me and the badges won't update! I want to re render my specific post. I've given my I am not very confident with cofeescript or js