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concerns_namespacing

📁 Organizing Concerns with Namespaces​

Keep controllers and models clean by grouping related modules inside a Concerns namespace. This avoids name collisions and improves discoverability.

# app/models/concerns/archivable.rb
module Concerns
  module Archivable
    extend ActiveSupport::Concern

    included do
      scope :archived, -> { where(archived: true) }
    end

    def archive!
      update!(archived: true)
    end
  end
end

class Post < ApplicationRecord
  include Concerns::Archivable
end

Post.archived # => ActiveRecord::Relation

Use a top-level Concerns namespace in app/*/concerns for consistency.