rails active_admin showing user as an ActiveRecord relation
<p>Im trying to figure out why is nested resource is shown as an ActiveRecord relation in active admin panel. Ideally, I would like to choice an <code>User</code> of the <code>Listing</code> by an email</p>

<p><a href="https://i.stack.imgur.com/qxPks.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/qxPks.png" alt="enter image description here"></a></p>

<p>User is deined as </p>

<pre><code>t.integer  "user_id"
</code></pre>