model.py

@staticmethod
def log(f=None):
  def deco(f):
    @functools.wraps(f)
    def func(*args, **kwargs):
      audit = AuditModel()
      user = request.headers.get("X-Auth-User")
      if user is None:
        return 'UNAUTHORIZED. Please provide X-Auth-User header.', 403
      audit.user = user
      audit.action = f'{f.__module__}.{f.__name__}'
      audit.timestamp = datetime.utcnow()
      if 'audit' in f.__code__.co_varnames:
        kwargs['audit'] = audit
      result = f(*args, **kwargs)
      if not audit.abort:
        audit.save(force_insert=True)
      return result
    return func

  if f and callable(f):
    return deco(f)

  return deco