title: before_filter to set common instance variable (Ruby On Rails)
body: <p>Is it a common practice to do a filter like this:</p>
  
  <pre><code>before_filter :get_clients, :only =&gt; [:new, :edit, :create, :update]
  ...
  def get_clients
        @clients = Client.accessible_by(current_ability)
  end
  </code></pre>
  
  <p>My form needs access to @clients, so I setup the variable @clients with a before filter instead of doing it in every method. Does this make sense?</p>