class ActiveRecord::ConnectionAdapters::PostgreSQL::OID::LegacyPoint

def cast(value)
  case value
  when ::String
    if value.start_with?("(") && value.end_with?(")")
      value = value[1...-1]
    end
    cast(value.split(","))
  when ::Array
    value.map { |v| Float(v) }
  else
    value
  end
end