Understand “current_user” concept when creating a login session in ruby

Question

I am going through the great Michael Hartl tutorial to build ruby app here.

I am trying to understand the concept of how to create a session and I am stuck in understand

Answer 1

The method def current_user=(user) is basically a setter that the sign_in method uses in order to set the current_user.

def current_user will return the @current_user or if it is not set it will find it in the Users table by the remember_token. This basically allows you get the current_user at any point in time.

self.current_user in the context of the sign_in method will refer to the calling class or module in this case. It will be calling current_user from the Session Helper module.