check if column is null eloquent code example

Example 1: check if value is not null in db laravel

Model::whereNotNull('sent_at')

Example 2: how to check if eloquent result is empty

Note:- Credit for this result goes to Alberto Peripolli. Copied from his Grepper.
if ($result->first()) { } 
if (!$result->isEmpty()) { }
if ($result->count()) { }
if (count($result)) { }