[RUBY] Memo that transitions to the login screen if you are not logged in with devise

If you are not logged in, the screen will change to the login screen.

authenticate_user! method

The authenticate_user! method is a devise helper method. When the authenticate_user! method is used, when the process is called, if the user is not logged in, that user is transitioned to the login screen. That is, the page to be displayed can be switched depending on the login status.

By calling before_action, you can transition to the login screen if you have not logged in before executing the action.

(Description example)

Write before_action: authenticate_user! At the beginning of the controller


class ApplicationController < ActionController::Base
  before_action :authenticate_user!

After the description, if you are not logged in, the screen will change to the login screen.

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