RailsDoc(β)
v5.2
v8.0
v7.2
v7.1
v7.0
v6.1
v6.0
v5.2
GitHub
Required Files
Namespace
Module
Class
Ruby on Rails 5.2.8
preview.rb
actionmailer/lib/action_mailer/preview.rb
on GitHub
Required Files
active_support/descendants_tracker
Namespace
Module
ActionMailer
ActionMailer::Previews
ActionMailer::Previews::ClassMethods
Class
ActionMailer::Preview