#54 楼 @sundevilyang ok

@sundevilyang 先报个名，当志愿者吧～哈哈

Mongoid 和 Heroku ... 好像就没遇见几个读正确的，包括一些公司的技术负责人，自己读正确的反而不好意思了

都是很实用的干货，赞！

#25 楼 @iwinux thx!

#10 楼 @sunfmin 有什么学习 Go 的入门好书或者资料可以推荐的吗？

#23 楼 @knwang can't agree more.

#2 楼 @huacnlee 赞同~

看完了，很棒！

不要点编辑才能删嘛，直接把删除的图标放在回复后面不好吗？

#5 楼 @I_AM_NOT_DHH 让别人给你汇钱的时候，你能告诉他一个错误的银行卡号么....

#3 楼 @I_AM_NOT_DHH 重新注册一个

怎么都不现身呢，让我等瞻仰一下～

用腾讯的企业邮箱发信完事

#7 楼 @knwang 赞同！

html5 或者 flash

哈哈 不错的海报！

试试 https://github.com/intridea/grape.git 呢？

我靠，想搞基啊～

怎么又拿语言和框架比，你应该说 Rails 和 CakePHP 吧？ 只看标题没看链接

minitest 如何？

Oh, 6+ years...

好人一生平安

# coding: utf-8
class Message
  include Mongoid::Document
  include Mongoid::Timestamps::Created  
  include Mongoid::CounterCache
  include Mongoid::DelayedDocument

  field :content
  field :sender_id
  field :receiver_id
  field :readed, :type => Boolean, :default => false

  embedded_in :dialog
  counter_cache :name => :dialog, :inverse_of => :messages

  belongs_to :sender, :class_name => 'User', :foreign_key => 'sender_id'
  belongs_to :receiver, :class_name => 'User', :foreign_key => 'receiver_id'

  validates :content, :presence => true, :length => { :maximum => 140 }

  index :receiver_id => 1
  index :created_at => -1

  default_scope desc('created_at')

  # A little confused.
  def self.post(sender_id, receiver_id, content)
    return if sender_id == receiver_id
    other_dialog = Dialog.find_or_create_by(:from_user_id => receiver_id, :to_user_id => sender_id)
    params = { :content => content, :sender_id => sender_id, :receiver_id => receiver_id }
    other_dialog.messages.create(params)
    self.perform_async(:send_message_to_self, params)
  end

  def self.send_message_to_self(opts)
    self_dialog = Dialog.find_or_create_by(:from_user_id => opts['sender_id'], :to_user_id => opts['receiver_id'])
    self_dialog.messages.create(opts)
    User.where(:_id => opts['receiver_id']).first.inc(:messages_count, 1)    
  end

  after_create do
    self.dialog.update_attributes(
      :last_reply_user_id       => self.sender_id,
      :last_reply_user_login    => self.sender.login,
      :last_reply_content       => self.content,
      :updated_at               => self.created_at
    )


  end

end

ruby_exam.results.includes(:user).order('results.score DESC').collect{ |result| result.user }