轮胎/ ElasticSearch单表继承支持

时间:2011-12-21 13:15:52

标签: ruby-on-rails ruby ruby-on-rails-3 elasticsearch tire

Cross post from GitHub

我的应用搜索各种第三方服务中的链接,如Delicious,Twitter ......我有以下基类:

class Link
  include Mongoid::Document
  include Tire::Model::Search
  include Tire::Model::Callbacks

  field :href, type: String
  field :name, type: String

  mapping do
    indexes :href, type: 'string', analyzer: 'url'
    indexes :name, type: 'string', analyzer: 'keyword', boost: 10
  end
end

并且以下类继承自Link并添加了两个字段:

class Link::Delicious < Link
  field :tags, type: Array
  field :time, type: Time

  mapping do
    indexes :tags, type: 'string', analyzer: 'keyword'
    indexes :time, type: 'date'
  end
end

搜索将通过基类完成:Link.search('google.com')。有没有机会让这个工作?目前,Link::Delicious中的(附加)字段被Tire / ElasticSearch完全忽略。

1 个答案:

答案 0 :(得分:4)

修复了覆盖mapping方法的问题:

class Link
  # …

  class << self
    def mapping_with_super(*args, &block)
      # Creating only one index
      index_name('links')
      document_type('link')

      superclass.mapping_without_super.each do |name, options|
        indexes(name, options)
      end if superclass.respond_to?(:mapping)

      mapping_without_super(args, &block)
    end
    alias_method_chain :mapping, :super
  end
end