re>
<p>Note that while <code>:comment_id</code> is populated with each comment's <code>id</code> (based on
the <code>@model</code> argument), the <code>:photo_id</code> segment is automatically assumed to be
the same as the corresponding segment in current URL, i.e. <code>2</code>.</p>
<p>Ember is only able to infer the dynamic segments because the <code>photo</code> route is
currently active. If we were to invoke the <code>&lt;LinkTo /&gt;</code> component for the same
<code>photos.photo.comment</code> rou