Rails 4, Mailer preview, preview attached images

Question

I have problem with rails 4.1.6 mailer preview.

I want to see attached images in preview mode, but it doesn\'t work. I think it\'s incorrect

There is my code:

Answer 1

For Rails >= 4.2 to preview images you should create initializer:

# config/initializer/preview_interceptors.rb
ActionMailer::Base.register_preview_interceptor(ActionMailer::InlinePreviewInterceptor)