autocomplete with tire

gistfile1.rb

#encoding: utf-8
require 'rubygems'
require 'tire'
require 'json'
require 'active_support/core_ext/object/to_query'
require 'active_support/core_ext/object/to_param'

conf = {
  settings: {
    number_of_shards: 1,
    number_of_replicas: 0,
    analysis: {
      analyzer: {
        my_start: {
          tokenizer: 'whitespace',
          filter: %w{asciifolding lowercase my_edge}
        },
        my_sort: {
          tokenizer: 'keyword',
          filter: %w{asciifolding lowercase}
        }
      },
      filter: {
        my_edge: {
          type: 'edgeNGram',
          min_gram: 1,
          max_gram: 10,
          side: 'front'
        }
      }
    }
  },
  mappings: {
    coral: {
      properties: {
        id: {type: 'string', index: 'not_analyzed', include_in_all: false},
        name: { type: 'multi_field', fields: {
          start: {
            type: 'string', analyzer: 'my_start', include_in_all: false
          },
          sort: {
            type: 'string', analyzer: 'my_sort', include_in_all: false
          }
        }
      }
    }
  }
  }
}

corals = [
  'Hydractinia echinata',
  'Heterastridium',
  'Hydractinia symbiolongicarpus',
  'Hydrichthys'
]

Tire.configure { logger 'elasticsearch.log', :level => 'debug' }

Tire.index 'corals' do
  delete
  create conf

  cpt = 0
  import corals.map{ |coral|
    cpt += 1
    {id: cpt.to_s, name: coral, type: 'coral'}
  }
  refresh
end

s = Tire.search 'corals' do
  query do
      string 'name.start:hydr'
  end
  sort do
    by :'name.sort', 'asc'
  end
end

s.results.each do |document|
  p document.name
end