title: Do fixtures trigger model callbacks?
body: <p>Say I have a User model with the following code in User.rb:</p>
  
  <pre><code>before_create :create_dependencies
  after_create :build_inbox
  </code></pre>
  
  <p>And I also have a users.yml file with a bunch of user fixtures defined in it.</p>
  
  <p>When I run rake db:fixtures:load, it doesn't appear to trigger the callbacks. </p>
  
  <ol>
  <li>Is this how it is expected to work? If so, why did they design it this way?</li>
  <li>Is there a way to force the triggering of the callbacks when loading fixtures?</li>
  </ol>