class ActiveRecord::ConnectionAdapters::PostgreSQL::OID::Bit

def cast_value(value)
  if ::String === value
    case value
    when /^0x/i
      value[2..-1].hex.to_s(2) # Hexadecimal notation
    else
      value                    # Bit-string notation
    end
  else
    value.to_s
  end
end