title: different DB type boolean in production and development environment
body: <p>I have a migration including the following type:</p>
  
  <pre><code>create_table :products do |t|
      t.boolean :overdue
  end
  </code></pre>
  
  <p>in my development setup though (Postgresql 9.1, rails 3.2.11) I have to test </p>
  
  <pre><code>p.overdue == "t" # or
  p.overdue == "f"
  </code></pre>
  
  <p>p.overdue? or p.overdue == true or p.overdue == false doesn't work. </p>
  
  <p>On heroku (I resently created the test app, so I guess ts cedar, PG 9.1 as well) I can test p.overdue? or p.overdue == true, while  the test on the string "t" or "f" doesn't work. </p>
  
  <p>Am I missing some configuration option in my development setup?</p>