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• 我如何用ongo子实施社会方面
原标题:How do I implement a social aspect with mongoid

我正试图在我正在制作的网站上建立一个朋友网络。 我正在使用Mongoid。 我如何直觉朋友?

我认为,用户需要与其他多个用户建立关系联系。 但以下法典:

class User
  include Mongoid::Document
  references_many :users, :stored_as=>:array, :inverse_of=> :users
end

我告诉我,我有了一个无效的问题。 我做了什么错误? 没有人就如何获得我所期待的东西提出建议?

最佳回答

显然,经过大量研究后,Mongoid目前无法进行周期性分配,尽管它按照需要加以标示,并可能在未来版本中确定。 我目前的工作情况如下:

class User
  include Mongoid::Document
  field :friends, :type => Array, :default => []

  def make_friends(friend)
    self.add_friend(friend)
    friend.add_friend(self)
  end

  def friends
    ids = read_attribute :friends
    ids.map { |id|  User.find(id)}
  end

  def is_friends_with? other_user
    ids = read_attribute :friends
    ids.include? other_user.id
  end

protected

  def add_friend(friend)
    current = read_attribute :friends
    current<< friend.id
    write_attribute :friends,current
    save
  end
end
问题回答

答案是,你不能。 Mongo 亚洲开发银行没有加入表格的概念,也没有加入。 Mongoid 有许多对手的“模拟”是通过在双方储存一系列外国钥匙来实现的。

针对一项评论:Mongo 亚洲开发银行是一个文件库。 因此,它适用于“文件”差异很大的情况。 当你用坎普斯和广告的子树储存你的变压器时,你将不得不在废墟中为变压器收集广告。 如果你的数据形式非常一致,那么你可以考虑使用一个关系数据库。 我们经常使用MySQL作为相关物体,然后将MongoDB文件添加到这些物体中,以便它们能够被没收。





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