title: break away from a controller action
body: <p>My question is if there is a rails equivalent to 'breaking' away from a controller action such as</p>
  
  <pre><code>def new
      if some_confirmation
          do_stuff
          break #I know this only breaks out of a loop but I want it to break out of the action. is this possible?
      end
      do_some_other_stuff_which_it_should_not_reach_after_breaking
  end
  </code></pre>
  
  <p>Also this raises the question if I'm doing something wrong and shouldn't be rather doing it with a <code>before_filter</code></p>
  
  <p>Also last question, is it better to enclose everything in a 'if-else'-statement in such definitions (not necessarily controller actions but also normal definitions) or do it like the way I intend to do up there ^?</p>