In method :message/create!, it’s not mentioned that the line assoc ?data :timestamp (java.util.Date.) right after msg/save-message! call needs to be deleted. Per reasoning in page185 Let’s add a RETURNING clause to our SQL so that we get all of our data exactly as it is in the database., the assoc line is no longer needed and it’s actually bad to leave it there cause regardless of client side login status new post will always be missing the author field.