Ecto Query fetch grandchildren with condition on child
<p>What's the best way to get all <code>comments</code> for a specific <code>user</code>'s <code>posts</code> where the <code>post</code> was published on a specific day?</p>

<p>I.e. <code>some_user.posts.comments where post.published_on == '2016-01-01'</code></p>

<p>I'm not interested in fetching the posts as an intermediate step, just the comments.</p>