peewee mysql 实体是none

peewee mysql 实体是none

class BackDirLog(Model):
    from_path = CharField()
    to_path= CharField()
    time = DateField()
    id = IntegerField()

    class Meta:
        database = database

print("创建表")
BackDirLog.create_table()

backDirLog = BackDirLog(from_path=from_path, to_path=to_path, time= datetime.datetime.now())
print("backDirLog",backDirLog)
# backDirLog None
# save
这样打印出来是None，请问要怎么办呀

代码见
https://gitee.com/starplatinum111/my_util_py_pub/blob/master/back_dir_log.py

哦哦 要create backDirLog = BackDirLog.create(from_path=from_path, to_path=to_path, time= now_time)