title: activerecord find all NOT included in an array
body: <p>I have an array of team names from another part of code and I want to find all the Teams not in that array. I've tried the following and it doesn't work.</p>
  
  <pre><code>@team_exclude_list = ['Team 1', 'Team 2', 'Team 3']
  @teams = Team.where("name != ?", @team_exclude_list)
  </code></pre>
  
  <p>This is in Rails 3 and the Googles aren't giving me much love.</p>