title: One-to-many Using Bridge Table
body: <p>I'm setting up relationships between models and I'm wondering if there's any harm using a bridge table for a one-to-many relationship?</p>
  
  <p>i.e. These are some of the models</p>
  
  <ul>
  <li>User</li>
  <li>Team</li>
  <li>Group</li>
  </ul>
  
  <p>Each User may or may-not have a Team or Group. Would it be better to have nullable FK's in the User model for <code>team_id</code>, <code>group_id</code>, or is using bridge tables <code>team_user</code>, <code>group_user</code> acceptable? (There is little chance this will ever be a many-to-many relationship)</p>
  
  <p>Would there be any ill effects in using a bridge table for one-to-many?</p>