Rails 4.1 Force ActionMailer to return other value

问题

how to i can force to return another value in ActionMailer method. Example:

class TestMailer < ActionMailer::Base

  extend MandrillApi

  def index(email, code)
    @code = code
    result = MandrillApi.send({subject: t('test.index.subject'), to: email, template: render_to_string})
    return result
  end
end

In this case i use ActionMailer to render template(render_to_string) and pass variables to the view, but i need get result value from MandrillApi module. When i call the method TestMailer.index("xxxx@gmail.com", "asdf123") the value return is #<ActionMailer::Base::NullMail:0x007fe5c433ab10>

Thanks!!

回答1:

Create separate class (not a descendant of ActionMailer::Base) for that task. ActionMailer will rewrite return values from its mailer actions.

You can use render_anywhere gem as a solution:

require 'render_anywhere'

class MandrilMailer
  extend MandrillApi
  include RenderAnywhere

  # We need that for 't' i18n helper to work
  include ActionView::Helpers::TranslationHelper

  class RenderingController < RenderAnywhere::RenderingController
    # we can use that for url_helpers to work properly
    def default_url_options
      host = {'production' => 'production.example.org', 'development' => 'development.example.org'}[Rails.env]
      {host: host}
    end
    # alternatively, you can add this line inside you config/environments/*.rb files, setting your own host:
    # Rails.application.routes.default_url_options[:host] = 'example.org'
  end
  def index(email, code)
    # 'render' is a RenderAnywhere call
    MandrilApi.send({subject: t('test.index.subject'), to: email, template: render(template: 'test_mailer/index', locals: {code: code}, layout: false)})
  end
end

MandrilMailer.new.index("user@example.org", "asdf123") # => result of MandrilApi.send

来源：https://stackoverflow.com/questions/31861153/rails-4-1-force-actionmailer-to-return-other-value