Ruby on Rails

Showing /home/ubuntu/blog/app/views/articles/index.html.erb where line #9 raised:

undefined method `each' for nil:NilClass

  <% @articles.each do |article| %>

    <tr>

      <td><%= article.title %></td>

      <td><%= article.text %></td>

 $ cat app/controllers/articles_controller.rb

class ArticlesController < ApplicationController

def index

    @articles = Article.all

end

$ cat  app/views/articles/index.html.erb

<h1>Listing articles</h1>

<table>

  <tr>

    <th>Title</th>

    <th>Text</th>

  </tr>

  <% @articles.each do |article| %>

    <tr>

      <td><%= article.title %></td>

      <td><%= article.text %></td>

    </tr>

  <% end %>

</table>

http://localhost:3000/articles