ruby - rails elastic search relationship attributes not indexed -

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basically got 3 models(book,chapter,author), , want include of books , author attributes when indexing chapter.

here 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        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 shows correct mapping

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

then why not author_name, book_title etc... in search results

<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 application without quantifying cross-platform sdd bandwidth!" id=415 title="future communications orchestrator" updated_at="2015-04-22t18:43:58.586z"> _type="chapter">>

you defining wrong serialization method. elasticsearch::model searches method as_indexed_json , defining to_indexed_json. in elasticesearch-model gem can find examples https://github.com/elastic/elasticsearch-rails/blob/master/elasticsearch-model/examples/activerecord_associations.rb#l82

it should this:

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

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