title: Model Relations in Ruby on Rails
body: <p>I'm working on a new app in Rails 3 but I'm not sure how can I build the relations between the models.</p>
  
  <p>Basically I have a <code>model User</code> and a <code>model Project</code>. An user can create a Project, becoming the project owner. But any other user besides the project owner can join this project as well, but as team member.</p>
  
  <p>Would I need to create a new model for this team relationship? And how would be the relations among this all?</p>
  
  <p>Thanks in advance.</p>