Class: PgSearch::Normalizer

Inherits:
Object
  • Object
show all
Defined in:
lib/pg_search/normalizer.rb

Constant Summary collapse

DISALLOWED_CHARACTERS = 
"'[''?\\:]'"

Instance Method Summary collapse

Constructor Details

#initialize(config) ⇒ Normalizer

Returns a new instance of Normalizer.



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# File 'lib/pg_search/normalizer.rb', line 5

def initialize(config)
  @config = config
end

Instance Method Details

#add_normalization(sql_expression) ⇒ Object 



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# File 'lib/pg_search/normalizer.rb', line 11

def add_normalization(sql_expression)
  return sql_expression unless config.ignore.include?(:accents)

  sql_node = case sql_expression
  when Arel::Nodes::Node
    sql_expression
  else
    Arel.sql(sql_expression)
  end

  Arel::Nodes::NamedFunction.new(
    "regexp_replace",
    [
      Arel::Nodes::NamedFunction.new(
        PgSearch.unaccent_function,
        [sql_node]
      ),
      Arel.sql(DISALLOWED_CHARACTERS),
      Arel.sql("''"),
      Arel.sql("'g'")
    ]
  ).to_sql
end