ruby-on-rails - Rails Engine 邮件程序缺少模板

Question

所以我正在开发一个 Rails 引擎并生成了一个邮件程序，其中包含我的观点

app/
  views/ 
    my_engine/ 
      user_mailer/
        account_activation.html.erb
        account_activation.text.erb

配置虚拟应用程序以显示我添加的预览

test/dummy/config/environments/development.rb

config.action_mailer.preview_path = MSearcher::Engine.root.join('test/mailers')

test/mailers/previews/my_engine/user_mailer_preview.rb

module MyEngine
    class UserMailerPreview < ActionMailer::Preview
        def account_activation
            User.first
            UserMailer.account_activation(user)
        end
    end
end

现在如果我创建我的邮件程序

/app/mailers/my_engine/user_mailer

module MyEngine
    class UserMailer < Application Mailer
        def account_activation(user)
            mail to: user.email, subject: "Account Activation"
        end
    end
end

有了这个我可以导航到 localhost:3000/rails/mailers/my_engine/users_mailer/account_activation

哪里出错了

Template is missing
Missing template layouts/mailer with {:locale=>[:en], :formats=>[:html], :variants=>[], :handlers=>[:raw, :erb, :html, :builder, :ruby, :coffee]}. 
Searched in: * 
    "/home/me/workspace/rails/my_engine/test/dummy/app/views" * 
    "/home/me/workspace/rails/my_engine/app/views"

所以默认行为是在它应该位于的文件夹上方的文件夹中查找我的模板。如何配置正确的行为？

Answer 1

我最后做的是告诉它在哪里可以找到布局

当我生成我的邮件程序时，它在

中创建了一个默认布局

app/
  views/ 
    layouts
      my_engine/
        mailer.html.erb
        mailer.text.erb
    my_engine/ 
      user_mailer/
        account_activation.html.erb
        account_activation.text.erb

但是 app/mailers/my_engine/application_mailer.rb 中的默认模板

module MyEngine
  class ApplicationMailer < ActionMailer::Base
    default from: 'from@example.com'
    layout 'mailer'
  end
end

这个布局确实应该是 'my_engine/mailer' 我不知道为什么 Rails 不自动执行此操作，但这解决了我的问题。