Ruby on Rails, controller doesn't seem to be linking to view

Question

In my index.html.erb file, this lot of code works:

<% if Restaurant.all.any? %>
  <% Restaurant.all.each do |restaurant| %>
    <h2><%= restaurant.name %></h2>
  <% end %>
<% else %>
  <h1>No restaurants yet!</h1>
<% end %>

<a href='#'>Add a restaurant</a>

However, when I change the controller to this:

 class RestaurantsController < ApplicationController
   def index
     @restaurants = Restaurant.all
   end
 end

and the index.html.erb file to this:

<% if @restaurants.any? %>
  <% @restaurants.each do |restaurant| %>
    <h2><%= restaurant.name %></h2>
  <% end %>
<% else %>
  <h1>No restaurants yet!</h1>
<% end %>

<a href='#'>Add a restaurant</a>

all of the tests which passed, now fail because of that change, and I can't for the life of me work out why they are not working. The error message when running the tests is:

 Failure/Error: visit '/restaurants'
 ActionView::Template::Error:
   undefined method `any?' for nil:NilClass

My routes.rb file is as follows:

Rails.application.routes.draw do
  resources :restaurants
end

Answer 1

Actually the problem is that your index is called directly without going to controller. So earlier your "Restaurant.all" works correctly but now atfer new changes @restuanants is null and you applied null.any? . It gives error. try

 <% if @restaurants && @restaurants.any? %>

or

<% unless @restaurants.blank? %>

Answer 2

Try this I hope this will help

In index.html.erb

<% unless @restaurants.blank? %>
  <% @restaurants.each do |restaurant| %>
    <h2><%= restaurant.name %></h2>
  <% end %>
<% else %>
  <h1>No restaurants yet!</h1>
<% end %>

<a href='#'>Add a restaurant</a>