title: Coffeescript + Express.js : efficient way to pass req.session to model classes
body: <p>I don't know if the fact that I'm using CS is relevant.</p>
  
  <p>Anyway: I've defined some classes that I use to handle database objects, but I cannot find a clean way to pass the current user id (found in req.session.user.id) to them.</p>
  
  <p>Is there a better way to achieve this than passing it every time as a parameter in the constructor?</p>