title: Django collaboration migration issue
body: <p>I currently have an issue when working with my friends on the same Django project.
  The situation is that every time when any of us made database changes and if other people did not migrate on time, they will get <em><strong>ProgrammingError: Column not exist</strong></em> error. That already happened a couple of times and we are still not able to figure a way to avoid this.
  Question:</p>
  <ol>
  <li>What's the best way to solve this issue when happened?</li>
  <li>What's the best process to void this issue?</li>
  </ol>