title: Many to many relationship react-admin
body: <p>Im trying to show in a <code>Datagrid</code> a <code>Field</code> that is in a many to many relationship (intermediate table). </p>
  
  <p>I have these tables:</p>
  
  <p>group - group_subject - subject</p>
  
  <ul>
  <li>A group can have many subjects</li>
  <li>A subject can be connected with many Groups</li>
  </ul>
  
  <blockquote>
    <p>group_subject also has attributes like rubrics and schedule</p>
  </blockquote>
  
  <p>It's a many to many relationship. I would like to show in the <code>&lt;Resource&gt;</code> <code>group</code> all the subjects that a group is connected to.</p>
  
  <p>Using something like the <code>&lt;SingleFieldList&gt;</code>:
  <a href="https://i.stack.imgur.com/3In65.png" rel="nofollow noreferrer">as this image</a></p>
  
  <p>I'm using <code>react-admin</code>. Is there a way to get values in this relationship? </p>