Rails Concerns: To Concern Or Not To Concern
If you’ve ever used Ruby on Rails, you’ve probably come across the concept of concerns. Whenever you jumpstart a new Rails project, you get a directory app/controllers/concerns and app/models/concerns. But what are concerns? And why do people from the Rails community sometimes talk badly about them?Quick OverviewA Rails Concern is any module that extends ActiveSupport::Concern module. You might ask — how are concerns so different from modules? The main difference is that Rails concerns allow you to do a bit of magic, like so:.
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