title: Mass update the tables in has-many relationship in Laravel
body: <p>I have a <code>One to Many relationship</code> between Channel and Video table. Both tables have <code>visibility</code> field. When I update the visibility of a channel, I want to update the visibility of all the videos that belong to that channel with the visibility value of the channel.</p>
  
  <p>How to achieve this mass update functionality in Laravel 5.4?</p>