Filters & Callbacks in Ruby

From the Ruby on Rails cheat sheet · Controllers · verified Jul 2026

Filters & Callbacks

Before/after/around filters for controller actions

ruby

class ApplicationController < ActionController::Base
  before_action :authenticate_user!
  before_action :set_locale
  after_action :log_action
  around_action :catch_errors

  private

  def set_locale
    I18n.locale = params[:locale] || I18n.default_locale
  end
end

✅ before_action runs before controller actions

💡 Use only/except to limit filter scope

🔍 skip_before_action skips inherited filters

⚡ around_action wraps action execution

controllersfilterscallbacks

More Ruby tasks

Controller Actions

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