Rails 5 mailer preview with Rspec

Question

I can't preview my emails, at http://localhost:3000/rails/mailers/user_mailer

I always get this error: Mailer preview 'user_mailer' not found

spec/previews/user_mailer_preview.rb

class UserMailerPreview < ActionMailer::Preview
  def contact_form
    UserMailer.contact_form("john@example.com", "John", "Hello World!")
  end
end

I tried to add:

config.action_mailer.preview_path = "#{Rails.root}/spec/previews"

but it didn't work.

Any ideas how to solve this problem?

Answer 1

尝试将文件移动到spec/mailers/previews/user_mailer_preview.rb 。

Answer 2

另一种选择是将environments/development.rb的路径更改为：

config.action_mailer.preview_path = "#{Rails.root}/spec/mailers/previews"