title: rails generate - "Could not find generator"
body: <p>I am following the Ruby on Rails tutorial by Michael Hartl. In section <a href="http://ruby.railstutorial.org/chapters/modeling-users.html#sec-an_encrypted_password">6.3.1</a>, I am trying to generate a migration file to add a Password field to my user model. Here is the code that I run:</p>
  
  <pre><code>rails generate add_passsword_digest_to_users password_digest:string
  </code></pre>
  
  <p>but this throws the error: <code>Could not find generator add_passsword_digest_to_users.</code></p>
  
  <p>i have used the <code>rails generate</code> command before and it worked perfectly. I'm not sure why I am getting this problem now.</p>
  
  <p>version: Rails 3.2.8, ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-linux]</p>