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
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