index.rb

  settings(index: {
      refresh_interval: '-1',
      number_of_shards: '3',
      number_of_replicas: '0',
      query: {
        default_field: 'offer_title'
      }
    },analysis: {
      filter: {
        stemming: {
          name: 'english',
          type: 'stemmer'
        },
        stopwords: {
          type: 'stop',
          stopwords: '_english_'
        },
        synonyms: {
          type: 'synonym',
          synonyms: [
            'refurbished,condition',
            'used,condition',
            'smartphone=>phone',
            'jujube, ju ju be'
          ]
        },
        autocomplete_filter: {
          type: 'edge_ngram',
          min_gram: '1',
          max_gram: '20'
        }
      },
      analyzer: {
        default: {
          filter: [
            'standard',
            'lowercase',
            'stopwords',
            'synonyms',
            'stemmer'
          ],
          tokenizer: 'standard'
        },
        didYouMean: {
          filter: [
            'lowercase',
            'stopwords'
          ],
          tokenizer: 'standard'
        },
        autocomplete_analyzer: {
          filter: [
            'lowercase',
            'autocomplete_filter'
          ],
          type: 'custom',
          tokenizer: 'standard'
        },
        edgeNGramAnalyzer: {
          filter: [
            'lowercase'
          ],
          tokenizer: 'edgeNGramTokenizer'
        }
      },
      tokenizer: {
        edgeNGramTokenizer: {
          token_chars: [
            'letter',
            'digit',
            'punctuation'
          ],
          min_gram: '1',
          type: 'edgeNGram',
          max_gram: '10'
        }
      }
    }
  )
  COUNT_OF_AGGREGATIONS = 5

  define_type DataFeedItem do
    root _all: { enabled: false }, dynamic: :strict
    field :boost, type: :double
    field :category, type: :string do
      field :raw, type: :string, index: :not_analyzed
    end
    field :did_you_mean, type: :string, analyzer: :didYouMean
    field :manufacturer, type: :string, copy_to: :did_you_mean, analyzer: :edgeNGramAnalyzer do
      field :raw, type: :string, index: :not_analyzed
    end
    field :merchant, type: :string, copy_to: :did_you_mean do
      field :raw, type: :string, index: :not_analyzed
    end
    field :offer_description, type: :string
    field :offer_id, type: :string, index: :no
    field :offer_title, type: :string, copy_to: :did_you_mean do
      field :autocomplete, type: :string, analyzer: :autocomplete_analyzer, search_analyzer: :standard
    end
    field :price, type: :double
    field :shipping_rate, type: :double
    field :source, type: :integer
    field :sub_category, type: :string do
      field :raw, type: :string, index: :not_analyzed
    end
  end