title: Integer out of range on Postgres DB
body: <p>Simple rails app using Postgres DB, getting 'integer out of range' error when trying to insert 2176968859.  Should be an easy fix to the migrations, but I'm not sure.  Right now I've got...</p>
  
  <pre><code>create_table :targets do |t|
     t.integer :tid
      ...
  end
  </code></pre>