title: How to store list of tuples in Django model?
body: <p>Is it possible to store field of tuples of <code>Model</code> in Django? In my case, I have a model Translator. The translator should store information about what languages he can translate. But there may be situation that translator can't translate from English to German but he/she can do that in opposite direction. </p>
  
  <p>So one object translator could store this:</p>
  
  <ul>
  <li>from German to English</li>
  <li>from Dutch to English </li>
  </ul>
  
  <p>but he can't translate from English to German or Dutch.</p>
  
  <p>So what I probably looking for is to store field of tuples of Models (there is a model called Language).</p>