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-rw-r--r--railties/lib/rails/mailers_controller.rb12
1 files changed, 10 insertions, 2 deletions
diff --git a/railties/lib/rails/mailers_controller.rb b/railties/lib/rails/mailers_controller.rb
index 66636e5d6b..0b0e802358 100644
--- a/railties/lib/rails/mailers_controller.rb
+++ b/railties/lib/rails/mailers_controller.rb
@@ -6,9 +6,9 @@ class Rails::MailersController < Rails::ApplicationController # :nodoc:
prepend_view_path ActionDispatch::DebugExceptions::RESCUES_TEMPLATE_PATH
before_action :require_local!, unless: :show_previews?
- before_action :find_preview, only: :preview
+ before_action :find_preview, :set_locale, only: :preview
- helper_method :part_query
+ helper_method :part_query, :locale_query
def index
@previews = ActionMailer::Preview.all
@@ -84,4 +84,12 @@ class Rails::MailersController < Rails::ApplicationController # :nodoc:
def part_query(mime_type)
request.query_parameters.merge(part: mime_type).to_query
end
+
+ def locale_query(locale)
+ request.query_parameters.merge(locale: locale).to_query
+ end
+
+ def set_locale
+ I18n.locale = params[:locale] || I18n.default_locale
+ end
end