Here’s a guide to set up redirection for admins and regular users to different home pages after login in a Rails application:

1. Override after_sign_in_path_for

Override the after_sign_in_path_for method in your ApplicationController:

class ApplicationController < ActionController::Base
  protect_from_forgery with: :exception

  def after_sign_in_path_for(resource)
    if resource.admin?
      rails_admin_path  # Redirect admin to RailsAdmin dashboard
    else
      user_home_path    # Redirect regular users to user home page
    end
  end
end

2. Define Routes

Ensure routes are defined in config/routes.rb:

Rails.application.routes.draw do
  mount RailsAdmin::Engine => '/admin', as: 'rails_admin'

  get 'user_home', to: 'users#home', as: 'user_home'

  devise_for :users

  root 'home#index'
end

3. Create User Home Action

Add a home action to UsersController:

class UsersController < ApplicationController
  before_action :authenticate_user!

  def home
  end
end

4. Create User Home View

Create the view for the user home page:

Welcome to your home page, <%= current_user.email %>!