class ActiveRecord::ConnectionAdapters::PostgreSQL::OID::Money

def cast_value(value)
  return value unless ::String === value
  # Because money output is formatted according to the locale, there are two
  # cases to consider (note the decimal separators):
  #  (1) $12,345,678.12
  #  (2) $12.345.678,12
  # Negative values are represented as follows:
  #  (3) -$2.55
  #  (4) ($2.55)
  value = value.sub(/^\((.+)\)$/, '-\1') # (4)
  case value
  when /^-?\D*+[\d,]+\.\d{2}$/  # (1)
    value.delete!("^-0-9.")
  when /^-?\D*+[\d.]+,\d{2}$/  # (2)
    value.delete!("^-0-9,")
    value.tr!(",", ".")
  end
  super(value)
end

def scale
  2
end

def type
  :money
end