[RUBY] Rails application guest login function implemented (devise not used)

Introduction

I think that the guest login function is almost indispensable when creating a portfolio of web applications.

There are several articles on the guest login function on Qiita, but currently (December 2020) most of them use devise. I implemented the login function without using devise, so I had a little trouble. If you are creating a portfolio without using devise like me, please refer to it!

Note In this article, I won't go into details on how to implement the login feature. If you want to know about the login function that does not use devise, please refer to the following article.

https://qiita.com/d0ne1s/items/7c4d2be3f53e34a9dec7

environment

• Ruby version 2.7.2
• Rails version 6.0.3.4

Guest login function implementation

• Proceed on the assumption that the login function is implemented in the sessions controller below.

** ① Create controller **

python

$ rails g controller guest_sessions_controller

** ② Add route ** The guest user is not deleted, so there is no destroy action.

routes.rb

post 'guest_login', to: "guest_sessions#create"

** ③ create action creation ** The password can be anything, but this time I set it randomly.

guest_sessions_controller.rb

class GuestSessionsController < ApplicationController
  def create
    user = User.find_or_create_by(email: "[email protected]") do |user|
      user.password = SecureRandom.urlsafe_base64
      user.name = "Guest user"
    end
      session[:user_id] = user.id
      flash[:success] = "You logged in as a guest user"
      redirect_to root_url
  end
end

** ④ Create guest login button ** Add a guest login button to your favorite page. Please change the appearance as appropriate.

python

<%= link_to "Guest login", guest_login_path, method: :post %>