Class: PgSearch::Features::Trigram

Inherits:
Feature
  • Object
show all
Defined in:
lib/pg_search/features/trigram.rb

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Feature

#initialize

Constructor Details

This class inherits a constructor from PgSearch::Features::Feature

Class Method Details

.valid_options ⇒ Object 



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# File 'lib/pg_search/features/trigram.rb', line 6

def self.valid_options
  super + i[threshold word_similarity]
end

Instance Method Details

#conditions ⇒ Object 



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# File 'lib/pg_search/features/trigram.rb', line 10

def conditions
  if options[:threshold]
    Arel::Nodes::Grouping.new(
      similarity.gteq(options[:threshold])
    )
  else
    Arel::Nodes::Grouping.new(
      Arel::Nodes::InfixOperation.new(
        infix_operator,
        normalized_query,
        normalized_document
      )
    )
  end
end

#rank ⇒ Object 



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# File 'lib/pg_search/features/trigram.rb', line 26

def rank
  Arel::Nodes::Grouping.new(similarity)
end