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@@ -837,6 +837,28 @@ en:
NOTE: In order to use this helper, you need to install [DynamicForm](https://github.com/joelmoss/dynamic_form)
gem by adding this line to your Gemfile: `gem 'dynamic_form'`.
+### Translations for Action Mailer E-Mail Subjects
+
+If you don't pass a subject to the `mail` method, Action Mailer will try to find
+it in your translations. The performed lookup will use the pattern
+`<mailer_scope>.<action_name>.subject` to construct the key.
+
+```ruby
+# user_mailer.rb
+class UserMailer < ActionMailer::Base
+ def welcome(user)
+ #...
+ end
+end
+```
+
+```yaml
+en:
+ user_mailer:
+ welcome:
+ subject: "Welcome to Rails Guides!"
+```
+
### Overview of Other Built-In Methods that Provide I18n Support
Rails uses fixed strings and other localizations, such as format strings and other format information in a couple of helpers. Here's a brief overview.