ruby-on-rails - rails Elasticsearch 关系属性未编入索引

Question

基本上我有 3 个模型(书籍、章节、作者)，我想在索引章节时包含一些书籍和作者属性。

这是我的Chapter.rb

class Chapter < ActiveRecord::Base
  belongs_to :book, :counter_cache => true
  include Elasticsearch::Model

  index_name [Rails.env, model_name.collection.gsub(/\//, '-')].join('_')

    mappings  do
      indexes :id, type: :integer
      indexes :title, type: :string
      indexes :description, type: :string
      indexes :content, type: :string
      indexes :updated_at, type: :date # Date example
      indexes :book_title
      indexes :book_type
      indexes :author_name
      indexes :book_id
    end

  def book_title
    book.title
  end
  def book_type
    book.book_type
  end
  def author_name
   " #{book.author.firstname} #{book.author.lastname} "
  end

  def to_indexed_json
    to_json methods: [:book_title, :book_type, :author_name]
  end
end

http://localhost:9200/development_chapters/_mapping?pretty 显示正确的映射

{
  "development_chapters" : {
    "mappings" : {
      "chapter" : {
        "properties" : {
          "author_name" : {
            "type" : "string"
          },
          "book_title" : {
            "type" : "string"
          },....
        }
      }
    }
  }
}

那为什么我在搜索结果中没有得到 author_name、book_title 等...

<Elasticsearch::Model::Response::Result:0x00000105e393a0 @result=#<Hashie::Mash _id="415" _index="development_chapters" _score=1.0 _source=#<Hashie::Mash book_id=153 content="[\"Explicabo accusantium odit .\"]" created_at="2015-04-22T18:43:58.586Z" description="You can't generate the application without quantifying the cross-platform SDD bandwidth!" id=415 title="Future Communications Orchestrator" updated_at="2015-04-22T18:43:58.586Z"> _type="chapter">>

Answer 1

您正在定义错误的序列化方法。 Elasticsearch::Model 搜索方法 as_indexed_json 并且您正在定义 to_indexed_json。在 elasticesearch-model gem 中，您可以找到示例 https://github.com/elastic/elasticsearch-rails/blob/master/elasticsearch-model/examples/activerecord_associations.rb#L82

它应该看起来像这样:

def as_indexed_json(options = {})
  as_json methods: [:book_title, :book_type, :author_name]
end