Class: Searchkick::Index

Inherits:
Object
  • Object
show all
Defined in:
lib/searchkick/index.rb,
lib/searchkick/logging.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, options = {}) ⇒ Index

Returns a new instance of Index.



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# File 'lib/searchkick/index.rb', line 5

def initialize(name, options = {})
  @name = name
  @options = options
end

Instance Attribute Details

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/searchkick/index.rb', line 3

def name
  @name
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/searchkick/index.rb', line 3

def options
  @options
end

Instance Method Details

#alias_exists? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/searchkick/index.rb', line 26

def alias_exists?
  client.indices.exists_alias name: name
end

#clean_indices ⇒ Object

remove old indices that start w/ index_name



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# File 'lib/searchkick/index.rb', line 147

def clean_indices
  all_indices = client.indices.get_aliases
  indices = all_indices.select { |k, v| (v.empty? || v["aliases"].empty?) && k =~ /\A#{Regexp.escape(name)}_\d{14,17}\z/ }.keys
  indices.each do |index|
    Searchkick::Index.new(index).delete
  end
  indices
end

#create(options = {}) ⇒ Object 



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# File 'lib/searchkick/index.rb', line 10

def create(options = {})
  client.indices.create index: name, body: options
end

#create_index(options = {}) ⇒ Object

reindex



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# File 'lib/searchkick/index.rb', line 139

def create_index(options = {})
  index_options = options[:index_options] || self.index_options
  index = Searchkick::Index.new("#{name}_#{Time.now.strftime('%Y%m%d%H%M%S%L')}", @options)
  index.create(index_options)
  index
end

#delete ⇒ Object 



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# File 'lib/searchkick/index.rb', line 14

def delete
  client.indices.delete index: name
end

#exists? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/searchkick/index.rb', line 18

def exists?
  client.indices.exists index: name
end

#import(records) ⇒ Object 



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# File 'lib/searchkick/index.rb', line 67

def import(records)
  records.group_by { |r| document_type(r) }.each do |type, batch|
    response =
      client.bulk(
        index: name,
        type: type,
        body: batch.map { |r| {index: {_id: search_id(r), data: search_data(r)}} }
      )
    if response["errors"]
      raise Searchkick::ImportError, response["items"].first["index"]["error"]
    end
  end
end

#import_scope(scope) ⇒ Object 



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# File 'lib/searchkick/index.rb', line 186

def import_scope(scope)
  batch_size = @options[:batch_size] || 1000

  # use scope for import
  scope = scope.search_import if scope.respond_to?(:search_import)
  if scope.respond_to?(:find_in_batches)
    scope.find_in_batches batch_size: batch_size do |batch|
      import batch.select(&:should_index?)
    end
  else
    # https://github.com/karmi/tire/blob/master/lib/tire/model/import.rb
    # use cursor for Mongoid
    items = []
    scope.all.each do |item|
      items << item if item.should_index?
      if items.length == batch_size
        import items
        items = []
      end
    end
    import items
  end
end

#import_with_instrumentation(records) ⇒ Object 



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# File 'lib/searchkick/logging.rb', line 40

def import_with_instrumentation(records)
  if records.any?
    event = {
      name: "#{records.first.searchkick_klass.name} Import",
      count: records.size
    }
    ActiveSupport::Notifications.instrument("request.searchkick", event) do
      import_without_instrumentation(records)
    end
  end
end

#index_options ⇒ Object 



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# File 'lib/searchkick/index.rb', line 210

def index_options
  options = @options
  language = options[:language]
  language = language.call if language.respond_to?(:call)

  if options[:mappings] && !options[:merge_mappings]
    settings = options[:settings] || {}
    mappings = options[:mappings]
  else
    settings = {
      analysis: {
        analyzer: {
          searchkick_keyword: {
            type: "custom",
            tokenizer: "keyword",
            filter: ["lowercase"] + (options[:stem_conversions] == false ? [] : ["searchkick_stemmer"])
          },
          default_index: {
            type: "custom",
            # character filters -> tokenizer -> token filters
            # https://www.elastic.co/guide/en/elasticsearch/guide/current/analysis-intro.html
            char_filter: ["ampersand"],
            tokenizer: "standard",
            # synonym should come last, after stemming and shingle
            # shingle must come before searchkick_stemmer
            filter: ["standard", "lowercase", "asciifolding", "searchkick_index_shingle", "searchkick_stemmer"]
          },
          searchkick_search: {
            type: "custom",
            char_filter: ["ampersand"],
            tokenizer: "standard",
            filter: ["standard", "lowercase", "asciifolding", "searchkick_search_shingle", "searchkick_stemmer"]
          },
          searchkick_search2: {
            type: "custom",
            char_filter: ["ampersand"],
            tokenizer: "standard",
            filter: ["standard", "lowercase", "asciifolding", "searchkick_stemmer"]
          },
          # https://github.com/leschenko/elasticsearch_autocomplete/blob/master/lib/elasticsearch_autocomplete/analyzers.rb
          searchkick_autocomplete_index: {
            type: "custom",
            tokenizer: "searchkick_autocomplete_ngram",
            filter: ["lowercase", "asciifolding"]
          },
          searchkick_autocomplete_search: {
            type: "custom",
            tokenizer: "keyword",
            filter: ["lowercase", "asciifolding"]
          },
          searchkick_word_search: {
            type: "custom",
            tokenizer: "standard",
            filter: ["lowercase", "asciifolding"]
          },
          searchkick_suggest_index: {
            type: "custom",
            tokenizer: "standard",
            filter: ["lowercase", "asciifolding", "searchkick_suggest_shingle"]
          },
          searchkick_text_start_index: {
            type: "custom",
            tokenizer: "keyword",
            filter: ["lowercase", "asciifolding", "searchkick_edge_ngram"]
          },
          searchkick_text_middle_index: {
            type: "custom",
            tokenizer: "keyword",
            filter: ["lowercase", "asciifolding", "searchkick_ngram"]
          },
          searchkick_text_end_index: {
            type: "custom",
            tokenizer: "keyword",
            filter: ["lowercase", "asciifolding", "reverse", "searchkick_edge_ngram", "reverse"]
          },
          searchkick_word_start_index: {
            type: "custom",
            tokenizer: "standard",
            filter: ["lowercase", "asciifolding", "searchkick_edge_ngram"]
          },
          searchkick_word_middle_index: {
            type: "custom",
            tokenizer: "standard",
            filter: ["lowercase", "asciifolding", "searchkick_ngram"]
          },
          searchkick_word_end_index: {
            type: "custom",
            tokenizer: "standard",
            filter: ["lowercase", "asciifolding", "reverse", "searchkick_edge_ngram", "reverse"]
          }
        },
        filter: {
          searchkick_index_shingle: {
            type: "shingle",
            token_separator: ""
          },
          # lucky find http://web.archiveorange.com/archive/v/AAfXfQ17f57FcRINsof7
          searchkick_search_shingle: {
            type: "shingle",
            token_separator: "",
            output_unigrams: false,
            output_unigrams_if_no_shingles: true
          },
          searchkick_suggest_shingle: {
            type: "shingle",
            max_shingle_size: 5
          },
          searchkick_edge_ngram: {
            type: "edgeNGram",
            min_gram: 1,
            max_gram: 50
          },
          searchkick_ngram: {
            type: "nGram",
            min_gram: 1,
            max_gram: 50
          },
          searchkick_stemmer: {
            # use stemmer if language is lowercase, snowball otherwise
            # TODO deprecate language option in favor of stemmer
            type: language == language.to_s.downcase ? "stemmer" : "snowball",
            language: language || "English"
          }
        },
        char_filter: {
          # https://www.elastic.co/guide/en/elasticsearch/guide/current/custom-analyzers.html
          # &_to_and
          ampersand: {
            type: "mapping",
            mappings: ["&=> and "]
          }
        },
        tokenizer: {
          searchkick_autocomplete_ngram: {
            type: "edgeNGram",
            min_gram: 1,
            max_gram: 50
          }
        }
      }
    }

    if Searchkick.env == "test"
      settings.merge!(number_of_shards: 1, number_of_replicas: 0)
    end

    if options[:similarity]
      settings[:similarity] = {default: {type: options[:similarity]}}
    end

    settings.deep_merge!(options[:settings] || {})

    # synonyms
    synonyms = options[:synonyms] || []

    synonyms = synonyms.call if synonyms.respond_to?(:call)

    if synonyms.any?
      settings[:analysis][:filter][:searchkick_synonym] = {
        type: "synonym",
        synonyms: synonyms.select { |s| s.size > 1 }.map { |s| s.join(",") }
      }
      # choosing a place for the synonym filter when stemming is not easy
      # https://groups.google.com/forum/#!topic/elasticsearch/p7qcQlgHdB8
      # TODO use a snowball stemmer on synonyms when creating the token filter

      # http://elasticsearch-users.115913.n3.nabble.com/synonym-multi-words-search-td4030811.html
      # I find the following approach effective if you are doing multi-word synonyms (synonym phrases):
      # - Only apply the synonym expansion at index time
      # - Don't have the synonym filter applied search
      # - Use directional synonyms where appropriate. You want to make sure that you're not injecting terms that are too general.
      settings[:analysis][:analyzer][:default_index][:filter].insert(4, "searchkick_synonym")
      settings[:analysis][:analyzer][:default_index][:filter] << "searchkick_synonym"

      %w(word_start word_middle word_end).each do |type|
        settings[:analysis][:analyzer]["searchkick_#{type}_index".to_sym][:filter].insert(2, "searchkick_synonym")
      end
    end

    if options[:wordnet]
      settings[:analysis][:filter][:searchkick_wordnet] = {
        type: "synonym",
        format: "wordnet",
        synonyms_path: Searchkick.wordnet_path
      }

      settings[:analysis][:analyzer][:default_index][:filter].insert(4, "searchkick_wordnet")
      settings[:analysis][:analyzer][:default_index][:filter] << "searchkick_wordnet"

      %w(word_start word_middle word_end).each do |type|
        settings[:analysis][:analyzer]["searchkick_#{type}_index".to_sym][:filter].insert(2, "searchkick_wordnet")
      end
    end

    if options[:special_characters] == false
      settings[:analysis][:analyzer].each do |_, analyzer_settings|
        analyzer_settings[:filter].reject! { |f| f == "asciifolding" }
      end
    end

    mapping = {}

    # conversions
    if (conversions_field = options[:conversions])
      mapping[conversions_field] = {
        type: "nested",
        properties: {
          query: {type: "string", analyzer: "searchkick_keyword"},
          count: {type: "integer"}
        }
      }
    end

    mapping_options = Hash[
      [:autocomplete, :suggest, :word, :text_start, :text_middle, :text_end, :word_start, :word_middle, :word_end, :highlight, :searchable]
        .map { |type| [type, (options[type] || []).map(&:to_s)] }
    ]

    word = options[:word] != false && (!options[:match] || options[:match] == :word)

    mapping_options.values.flatten.uniq.each do |field|
      field_mapping = {
        type: "multi_field",
        fields: {
          field => {type: "string", index: "not_analyzed"}
        }
      }

      if !options[:searchable] || mapping_options[:searchable].include?(field)
        if word
          field_mapping[:fields]["analyzed"] = {type: "string", index: "analyzed"}

          if mapping_options[:highlight].include?(field)
            field_mapping[:fields]["analyzed"][:term_vector] = "with_positions_offsets"
          end
        end

        mapping_options.except(:highlight, :searchable).each do |type, fields|
          if options[:match] == type || fields.include?(field)
            field_mapping[:fields][type] = {type: "string", index: "analyzed", analyzer: "searchkick_#{type}_index"}
          end
        end
      end

      mapping[field] = field_mapping
    end

    (options[:locations] || []).map(&:to_s).each do |field|
      mapping[field] = {
        type: "geo_point"
      }
    end

    (options[:unsearchable] || []).map(&:to_s).each do |field|
      mapping[field] = {
        type: "string",
        index: "no"
      }
    end

    routing = {}
    if options[:routing]
      routing = {required: true, path: options[:routing].to_s}
    end

    dynamic_fields = {
      # analyzed field must be the default field for include_in_all
      # http://www.elasticsearch.org/guide/reference/mapping/multi-field-type/
      # however, we can include the not_analyzed field in _all
      # and the _all index analyzer will take care of it
      "{name}" => {type: "string", index: "not_analyzed", include_in_all: !options[:searchable]}
    }

    unless options[:searchable]
      if options[:match] && options[:match] != :word
        dynamic_fields[options[:match]] = {type: "string", index: "analyzed", analyzer: "searchkick_#{options[:match]}_index"}
      end

      if word
        dynamic_fields["analyzed"] = {type: "string", index: "analyzed"}
      end
    end

    mappings = {
      _default_: {
        properties: mapping,
        _routing: routing,
        # https://gist.github.com/kimchy/2898285
        dynamic_templates: [
          {
            string_template: {
              match: "*",
              match_mapping_type: "string",
              mapping: {
                # http://www.elasticsearch.org/guide/reference/mapping/multi-field-type/
                type: "multi_field",
                fields: dynamic_fields
              }
            }
          }
        ]
      }
    }.deep_merge(options[:mappings] || {})
  end

  {
    settings: settings,
    mappings: mappings
  }
end

#klass_document_type(klass) ⇒ Object 



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# File 'lib/searchkick/index.rb', line 527

def klass_document_type(klass)
  if klass.respond_to?(:document_type)
    klass.document_type
  else
    klass.model_name.to_s.underscore
  end
end

#mapping ⇒ Object 



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# File 'lib/searchkick/index.rb', line 30

def mapping
  client.indices.get_mapping index: name
end

#refresh ⇒ Object 



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# File 'lib/searchkick/index.rb', line 22

def refresh
  client.indices.refresh index: name
end

#reindex_record(record) ⇒ Object 



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# File 'lib/searchkick/index.rb', line 89

def reindex_record(record)
  if record.destroyed? || !record.should_index?
    begin
      remove(record)
    rescue Elasticsearch::Transport::Transport::Errors::NotFound
      # do nothing
    end
  else
    store(record)
  end
end

#reindex_record_async(record) ⇒ Object 



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# File 'lib/searchkick/index.rb', line 101

def reindex_record_async(record)
  if defined?(Searchkick::ReindexV2Job)
    Searchkick::ReindexV2Job.perform_later(record.class.name, record.id.to_s)
  else
    Delayed::Job.enqueue Searchkick::ReindexJob.new(record.class.name, record.id.to_s)
  end
end

#reindex_scope(scope, options = {}) ⇒ Object

gist.github.com/jarosan/3124884 www.elasticsearch.org/blog/changing-mapping-with-zero-downtime/



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# File 'lib/searchkick/index.rb', line 158

def reindex_scope(scope, options = {})
  skip_import = options[:import] == false

  clean_indices

  index = create_index(index_options: scope.searchkick_index_options)

  # check if alias exists
  if alias_exists?
    # import before swap
    index.import_scope(scope) unless skip_import

    # get existing indices to remove
    swap(index.name)
    clean_indices
  else
    delete if exists?
    swap(index.name)

    # import after swap
    index.import_scope(scope) unless skip_import
  end

  index.refresh

  true
end

#remove(record) ⇒ Object 



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# File 'lib/searchkick/index.rb', line 56

def remove(record)
  id = search_id(record)
  unless id.blank?
    client.delete(
      index: name,
      type: document_type(record),
      id: id
    )
  end
end

#remove_with_instrumentation(record) ⇒ Object 



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# File 'lib/searchkick/logging.rb', line 29

def remove_with_instrumentation(record)
  event = {
    name: "#{record.searchkick_klass.name} Remove",
    id: search_id(record)
  }
  ActiveSupport::Notifications.instrument("request.searchkick", event) do
    remove_without_instrumentation(record)
  end
end

#retrieve(record) ⇒ Object 



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# File 'lib/searchkick/index.rb', line 81

def retrieve(record)
  client.get(
    index: name,
    type: document_type(record),
    id: search_id(record)
  )["_source"]
end

#search_model(searchkick_klass, term = nil, options = {}, &block) ⇒ Object

search



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# File 'lib/searchkick/index.rb', line 127

def search_model(searchkick_klass, term = nil, options = {}, &block)
  query = Searchkick::Query.new(searchkick_klass, term, options)
  block.call(query.body) if block
  if options[:execute] == false
    query
  else
    query.execute
  end
end

#similar_record(record, options = {}) ⇒ Object 



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# File 'lib/searchkick/index.rb', line 109

def similar_record(record, options = {})
  like_text = retrieve(record).to_hash
    .keep_if { |k, _| !options[:fields] || options[:fields].map(&:to_s).include?(k) }
    .values.compact.join(" ")

  # TODO deep merge method
  options[:where] ||= {}
  options[:where][:_id] ||= {}
  options[:where][:_id][:not] = record.id.to_s
  options[:limit] ||= 10
  options[:similar] = true

  # TODO use index class instead of record class
  search_model(record.class, like_text, options)
end

#store(record) ⇒ Object

record based



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# File 'lib/searchkick/index.rb', line 47

def store(record)
  client.index(
    index: name,
    type: document_type(record),
    id: search_id(record),
    body: search_data(record)
  )
end

#store_with_instrumentation(record) ⇒ Object 



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# File 'lib/searchkick/logging.rb', line 18

def store_with_instrumentation(record)
  event = {
    name: "#{record.searchkick_klass.name} Store",
    id: search_id(record)
  }
  ActiveSupport::Notifications.instrument("request.searchkick", event) do
    store_without_instrumentation(record)
  end
end

#swap(new_name) ⇒ Object 



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# File 'lib/searchkick/index.rb', line 34

def swap(new_name)
  old_indices =
    begin
      client.indices.get_alias(name: name).keys
    rescue Elasticsearch::Transport::Transport::Errors::NotFound
      []
    end
  actions = old_indices.map { |old_name| {remove: {index: old_name, alias: name}} } + [{add: {index: new_name, alias: name}}]
  client.indices.update_aliases body: {actions: actions}
end

#tokens(text, options = {}) ⇒ Object

other



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# File 'lib/searchkick/index.rb', line 523

def tokens(text, options = {})
  client.indices.analyze({text: text, index: name}.merge(options))["tokens"].map { |t| t["token"] }
end