Check methods requirements

    :param callable func: the function to decorate
    :return callable: the wrapped function

def check_method_requirements(func):
    """Check methods requirements

    :param callable func: the function to decorate
    :return callable: the wrapped function
    """
    @wraps(func)
    def wrapper(*args, **kwargs):
        error_message = "You must provide {error_field} in {cls} to get access to the default {method} method"
        error_data = {'cls': args[0].__class__.__name__, 'method': request.method.lower()}

        if request.method != 'DELETE':
            if not hasattr(args[0], 'schema'):
                error_data.update({'error_field': 'a schema class'})
                raise Exception(error_message.format(**error_data))

        return func(*args, **kwargs)
    return wrapper