ruby-on-rails - 确认邮件 - 如何避免代码重复

Question

我的应用程序中有两个不同的进程，之后我想在每个进程完成后向用户发送一封确认电子邮件。我可以创建两个单独的邮件，例如。 BankProcessMailer和 ShopProcessMailer但它们将包含如下相同的代码:

class BankProcess < BaseMailer
  layout 'bank_process'

  def send_email(email)
    mail_headers = headers(email)
    mail(mail_headers)
  end

  private

  def headers(email)
    super(email).merge(subject: 'Bank process')
  end
end

是否有机会处理具有两种不同 View 和主题的邮件程序以避免代码重复，并且不要为 ShopProcessMailer 创建新邮件程序？像下面？

class ShopProcess < BaseMailer
  layout 'shop_process'

  def send_email(email)
    mail_headers = headers(email)
    mail(mail_headers)
  end

  private

  def headers(email)
    super(email).merge(subject: 'Shop process')
  end
end

Answer 1

如果有什么变化只是subject和布局，可以创建一个继承BaseMailer的类，然后用来继承ShopProcess和 BankProcess从，那么你可以尝试这样的事情:

class ConfirmationMailer < BaseMailer
  protected

  def send_email(email)
    mail_headers = headers(email)
    mail(mail_headers)
  end

  def headers(email)
    super(email).merge(subject: SUBJECT)
  end
end

# frozen_string_literal: true

class BankProcess < ConfirmationMailer
  SUBJECT = 'Bank process'
  layout 'bank_process'
end

# frozen_string_literal: true

class ShopProcess < ConfirmationMailer
  SUBJECT = 'Shop process'
  layout 'shop_process'
end