title: Rails 3 migrations: Adding reference column?
body: <p>If I create a new rails 3 migration with (for example)</p>
  
  <pre><code>rails g migration tester title:tester user:references
  </code></pre>
  
  <p>, everything works fine...however if I add a column with something along the lines of:</p>
  
  <pre><code>rails g migration add_user_to_tester user:references
  </code></pre>
  
  <p>the reference field is not recognised. In short, the question is: how do I add a referencing column to a rails migration from the command line?</p>