Ruby on Rails：您是否建议使用Observers？

Question

I notice it's used primarily for sending emails. Let's say I want to send an email after every comment is created.

Is using Observers really necessary when you could just place the Mailer.deliver_email(user) in your comments_controller.rb's create action instead?

Answer 1

For proper programming practices, yes. The observers decouple the code and make sure it stays maintainable.