Module: Runestone

Defined in:
lib/runestone.rb,
lib/runestone/version.rb

Defined Under Namespace

Modules: ActiveRecord, Corpus, PsqlSchemaDumper Classes: Engine, IndexingJob, Model, Settings, WebSearch

Constant Summary collapse

VERSION = 
'2.1'

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.add_synonym(word, *replacements) ⇒ Object 



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# File 'lib/runestone.rb', line 40

def self.add_synonym(word, *replacements)
  word = normalize(word)
  replacements.map! { |r| normalize(r) }

  word = word.split(/\s+/)
  last = word.pop

  syn = synonyms
  word.each do |w|
    syn = if syn.has_key?(w) && h = syn[w].find { |i| i.is_a?(Hash) }
      h
    else
      h = {}
      syn[w] ||= []
      syn[w] << h
      h
    end
  end

  syn[last] ||= []
  syn[last] += replacements
  syn[last].uniq!
end

.add_synonyms(dictionary) ⇒ Object 



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# File 'lib/runestone.rb', line 34

def self.add_synonyms(dictionary)
  dictionary.each do |k, v|
    add_synonym(k, *v)
  end
end

.normalize(string) ⇒ Object 



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# File 'lib/runestone.rb', line 20

def self.normalize(string)
  string = string.downcase
  string = string.unicode_normalize!
  string
rescue Encoding::CompatibilityError
  string
end

.normalize!(string) ⇒ Object 



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# File 'lib/runestone.rb', line 28

def self.normalize!(string)
  string.downcase!
  string.unicode_normalize!
rescue Encoding::CompatibilityError
end

Instance Method Details

#search(query, dictionary: nil, prefix: :last, normalization: nil) ⇒ Object 



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# File 'lib/runestone.rb', line 64

def search(query, dictionary: nil, prefix: :last, normalization: nil)
  exact_search = Runestone::WebSearch.parse(query, prefix: prefix)
  typo_search = exact_search.typos
  syn_search = typo_search.synonymize
  
  tsqueries = [exact_search, typo_search, syn_search].map(&:to_s).uniq.map do |q|
    ts_query(q, dictionary: dictionary)
  end
  
  q = if select_values.empty?
    select(
      klass.arel_table[Arel.star],
      *tsqueries.each_with_index.map { |q, i| Arel::Nodes::As.new(ts_rank_cd(:vector, q, dictionary: dictionary, normalization: normalization), Arel::Nodes::SqlLiteral.new("rank#{i}")) }
    )
  else
    select(
      *tsqueries.each_with_index.map { |q, i| Arel::Nodes::As.new(ts_rank_cd(:vector, q, dictionary: dictionary, normalization: normalization), Arel::Nodes::SqlLiteral.new("rank#{i}")) }
    )
  end

  q = if klass == Runestone::Model
    q.where(ts_match(:vector, tsqueries.last, dictionary: dictionary))
  else
    q.joins(:runestones).where(ts_match(TS::Model.arel_table['vector'], tsqueries.last, dictionary: dictionary))
  end

  q = q.where(dictionary: dictionary) if dictionary
    
  q.order(
    *tsqueries.each_with_index.map { |q, i| Arel::Nodes::Descending.new(Arel::Nodes::SqlLiteral.new("rank#{i}")) }
  )
end