title: How can I enrich in viur relations with further data fields
body: <p>How can I enrich in viur relations with further data fields.</p>
  <p>With SQL Alchemy I can do this with Association Objects.
  Is this also possible in viur?</p>
  <p>I have tried the following:</p>
  <pre><code>skeleton.relation.setBoneValue(skeleton, &quot;relation&quot;, {&quot;key&quot;:keyObj,&quot;afield&quot;:&quot;avalue}, True)
  </code></pre>
  <p>But this does not work.</p>