Ruby on rails 4 如何在铁路邮递员接收机中使用强计数器4

我正在测试Rails4.2.1（Ruby 2.1.6）中使用Mailman gem接收电子邮件的功能。 接收电子邮件很好，但我无法将数据插入具有强参数的表中。 在这里，异常错误似乎是由错误引起的

"...ERROR -- : private method `require' called for
 #<ActiveSupport::HashWithIndifferentAccess:..."

和用户_mailer.rb：

class UserMailer < ApplicationMailer
  def receive(message)
  end
end

消息\u rec.rb

class MessagesRec < ApplicationController    
  def receive(message, params)
    puts "------------ #{message}"
    params[:message] = {}
    params[:message][:title] = message.subject
    params[:message][:description] = message.text_part.body.decoded
    puts "------------ #{params}"
    @message = Message.new(params.require(:message).permit(:title, :description))
    if @message.save
      puts 'Message was successfully created.'
    else
      puts 'Message was lost.'
    end
  end
end

class MessagesRec

这个错误“NoMethodError:private method`require'called”是否意味着不能在此邮件处理中使用？ 怎么可能呢？ 先谢谢你

E, [2015-09-15T15:29:26.944316 #2316] ERROR -- : Error encountered processing message: #<Net::POPMail 1>
 NoMethodError: private method `require' called for #<ActiveSupport::HashWithIndifferentAccess:0x4523cb8>
 C:/Users/gworth-sny/Z_userfolder/rails/mailman_model/app/controllers/messages_rec.rb:10:in `receive'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/mailman-0.7.3/lib/mailman/router.rb:58:in `route'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/mailman-0.7.3/lib/mailman/message_processor.rb:23:in `block in process'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/mailman-0.7.3/lib/mailman/middleware.rb:33:in `call'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/mailman-0.7.3/lib/mailman/middleware.rb:33:in `block in run'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/mailman-0.7.3/lib/mailman/middleware.rb:38:in `call'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/mailman-0.7.3/lib/mailman/middleware.rb:38:in `run'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/mailman-0.7.3/lib/mailman/message_processor.rb:22:in `process'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/mailman-0.7.3/lib/mailman/receiver/pop3.rb:49:in `block in get_messages'
C:/Ruby21/lib/ruby/2.1.0/net/pop.rb:665:in `each'
C:/Ruby21/lib/ruby/2.1.0/net/pop.rb:665:in `each_mail'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/mailman-0.7.3/lib/mailman/receiver/pop3.rb:47:in `get_messages'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/mailman-0.7.3/lib/mailman/application.rb:140:in `block in polling_loop'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/mailman-0.7.3/lib/mailman/application.rb:137:in `loop'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/mailman-0.7.3/lib/mailman/application.rb:137:in `polling_loop'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/mailman-0.7.3/lib/mailman/application.rb:87:in `run'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/mailman-0.7.3/lib/mailman/application.rb:15:in `run'
script/mailman_server.rb:19:in `<main>'

Mailman::Application.run do
  to "%event%@sample.com", "MessagesRec#receive" do
    begin

    rescue Exception => e
      Mailman.logger.error "Exception occurred while receiving message:n#{message}"
      Mailman.logger.error [e, *e.backtrace].join("n")
    end
  end
end

class MessagesRec < ApplicationController    
  def receive(message, params)
    puts "------------ #{message}"
    params[:message] = {}
    params[:message][:title] = message.subject
    params[:message][:description] = message.text_part.body.decoded
    puts "------------ #{params}"
    @message = Message.new(params.require(:message).permit(:title, :description))
    if @message.save
      puts 'Message was successfully created.'
    else
      puts 'Message was lost.'
    end
  end
end