Add 404 page

app/controllers/application_controller.rb

 class ApplicationController < ActionController::Base
 class ApplicationController < ActionController::Base
   before_action :store_current_location, unless: :devise_controller?
   before_action :store_current_location, unless: :devise_controller?
   protect_from_forgery with: :exception
   protect_from_forgery with: :exception
+  rescue_from ActiveRecord::RecordNotFound, with: :render_404
+
+  def render_404
+    render template: 'errors/error_404', status: 404
+  end
 
 
   private
   private
 
 

app/views/errors/error_404.html.erb

+<%- provide(:title, 'Errors') -%>
+<div class="well">
+  <h2>404 - Not Found</h2>
+</div>