在 rails 邮件程序上调用 deliver_later 之前存储当前可选路由范围

Question

Rails 4.2 Ruby2.3

我有两个可选路由 scopes 与 locale 信息相关。它们设置在配置 default_url_options 方法的 application_controller 中的 before_action 中。即

# app/controllers/application_controller
# simplified version, usually has two locale values, 
# locale_lang and locale_city


before_action :redirect_to_locale_unless_present

private

# If params[:locale] is not set then
# redirect to the correct locale base on request data    
def redirect_to_locale_unless_present
  unless params[:locale].present?
    redirect_to url_for(locale: request.location.country_code)
  end
end

def default_url_options(options = {}
  { locale_lang: params[:locale_lang] }.merge(options)
end

范围是 locale_lang 和 locale_city，最终看起来像 http://localhost:3000/fr/ or http://localhost:3000/en/

这一切都在浏览器中按预期工作，但我想利用 ActionMailer::DeliveryJob 在后台进程中发送电子邮件。一个明显的问题是 ActionMailer::DeliveryJob 不存储 params[:locale].

的值

我希望能够调用 SomeMailer.generic_email(options).deliver_later 并将当前的 default_url_options 发送到 ActionMailer::DeliveryJob ，然后 ActionMailer::DeliveryJob 将沿着链传递那些并在实际处理时使用它们邮件。我当然可以将 default_url_options 定义为每个 Mailer 方法的参数，但我更愿意设置应用程序以便自动包含它。

您是否遇到过此问题或对如何处理该任务有任何建议。请记住，它也应该是线程安全的。

我目前失败的方法是将当前的请求保存在Thread.current中，然后在enqueue_delivery 通过 .deliver_later 调用。然后我想覆盖 ActionMailer::DeliveryJob 的 perform 方法来接受 url_options 并使用 class_eval 在 current mailer [=76] 中定义 default_url_options 方法=]。 但是，使用时似乎甚至没有调用 perform deliver_later 有什么想法吗？

class ApplicationController
  before_action :store_request

  private

  def store_request
    Thread.current['actiondispatch.request'] = request
  end
end

module DeliverLaterWithLocale
  module MessageDeliveryOverrides
    def enqueue_delivery(delivery_method, options={})
      args = [
        @mailer.name,
        @mail_method.to_s,
        delivery_method.to_s,
        url_options,
        *@args
      ]
      ActionMailer::DeliveryJob.set(options).perform_later(*args)
    end

    private

    def url_options
      options = {}
      request  = Thread.current["actiondispatch.request"]
      if request
        host     = request.host
        port     = request.port
        protocol = request.protocol
        lang = request.params[:locale_lang]
        city = request.params[:locale_city]
        standard_port = request.standard_port
        options[:protocol] = protocol
        options[:host]     = host
        options[:port]     = port if port != standard_port
        options[:locale_lang] = lang
        options[:locale_city] = city
      end
      ActionMailer::Base.default_url_options.merge(options)
    end
  end

  module DeliveryJobOverrides
    def perform(mailer, mail_method, delivery_method, url_options, *args)
      mailer = mailer.constantize.public_send(mail_method, *args)
      Kernel.binding.pry
      mailer.class_eval <<-RUBY, __FILE__, __LINE__ + 1
        def default_url_options_with_options(*args)
          default_url_options_without_current_request(*args).merge(url_options)
        end
        alias_method_chain :default_url_options, :options
      RUBY
      mailer.send(delivery_method)
    end
  end
end

Answer 1

以防其他人想要这样做。我通过添加

修复了它

class ApplicationController
  before_action :store_request

  private

  def store_request
    Thread.current['actiondispatch.request'] = request
  end
end

module DeliverLaterWithLocale
  module MessageDeliveryOverrides
    def enqueue_delivery(delivery_method, options={})
      args = [
        @mailer.name,
        @mail_method.to_s,
        delivery_method.to_s,
        url_options,
        *@args
      ]
      ActionMailer::DeliveryJob.set(options).perform_later(*args)
    end

    private

    def url_options
      options = {}
      request  = Thread.current["actiondispatch.request"]
      if request
        host     = request.host
        port     = request.port
        protocol = request.protocol
        lang = request.params[:locale_lang]
        city = request.params[:locale_city]
        standard_port = request.standard_port
        options[:protocol] = protocol
        options[:host]     = host
        options[:port]     = port if port != standard_port
        options[:locale_lang] = lang
        options[:locale_city] = city
      end
      ActionMailer::Base.default_url_options.merge(options)
    end
  end

  module DeliveryJobOverrides
    def perform(mailer, mail_method, delivery_method, url_options, *args)
      mailer = mailer.constantize
      mailer.default_url_options = url_options
      mailer.public_send(mail_method, *args).send(delivery_method)
    end
  end
end

然后将它们添加到初始值设定项

中的相应类

在 rails 邮件程序上调用 deliver_later 之前存储当前可选路由范围

Storing current optional route scope before calling deliver_later on rails mailer

locale

ruby-on-rails

actionmailer

delayed-job

rails-activejob