<p>From what I&#39;ve read, people say the controller needs to be skinny. I was looking into one of the popular rails app <code>discource</code> and <a target='_blank' rel='noopener noreferrer'  href="https://github.com/discourse/discourse/blob/master/app/controllers/email_controller.rb">here is a controller</a> from that app. </p>
<p>As we can see there are action which are 30 lines long. Is that ok to have? Any ideas feedback and suggestions on this?</p>


From what I've read, people say the controller needs to be skinny. I was looking into one of the popular rails app `discource` and [here is a controller](https://github.com/discourse/discourse/blob/master/app/controllers/email_controller.rb) from that app. 

As we can see there are action which are 30 lines long. Is that ok to have? Any ideas feedback and suggestions on this?


How big should a controller action be?

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