class validator_exception(Exception):
    def __init__(self, name: str) -> None:
        super().__init__("Invalid property names: " + name + ".")

class exists_exception(Exception):
    def __init__(self, name: str) -> None:
        super().__init__("Item with this " + name + " already in database.")

class bad_request_exception(Exception):
    def __init__(self, content: str) -> None:
        super().__init__("Bad request: " + content + ".")

class not_found_exception(Exception):
    def __init__(self) -> None:
        super().__init__("Not found required target.")

class not_ready_exception(Exception):
    def __init__(self, target: any) -> None:
        dump = str(target)
        what = str(type(target))
        
        info = "Can not work, because " + what + " is not raeady.\n"
        info = info + "Dump:\n" + what + "\n\n"

        super().__init__(info)