title: How to implement projects with project admins in Rails
body: <p>What I'm looking for is an appropriate way to set up a system where users can create projects and therefor become the admin of that project.  The user can then add other admins to the project.  Finally, other non-admin users can join the project.  </p>
  
  <p>I want to be able to verify whether a user is an admin of a project to check whether he has edit/update privileges.  Any thoughts?</p>
  
  <p>I figure I'll probably have a users_projects table and a projects_admins table, but I can't figure out how that translates to Rails relationships....</p>
  
  <p>Thanks!</p>