在Django中，我如何用db time保存或更新datetime字段的datetime

Question

db "T"与一个有datetime字段的表，例如

CREATE TABLE `exec_job` (
  `job_id` int(11) NOT NULL AUTO_INCREMENT,
  `status` int(11) NOT NULL,
  `create_time` datetime NOT NULL,
  `finish_time` datetime NOT NULL,
  PRIMARY KEY (`job_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

在一台机器上，例如机器IP是192.168.0.100。

我的Django App "M"在另一台机器上，例如:机器IP为192.168.0.200，应用程序M使用数据库t

当我保存或更新数据到db时，我发现"create_time"字段和"finish_time"字段使用192.168.0.200的时间来保存。而，我如何保存或更新datetime字段的datetime与db时间在我的Django应用程序代码?

Models类如下:

class ExecJob(models.Model):
    JobId       = models.AutoField(db_column = "job_id", primary_key = True)
    Status      = models.IntegerField(db_column = "status", default = 0)
    CreateTime  = models.DateTimeField(db_column = "create_time", auto_now_add = True)
    FinishTime  = models.DateTimeField(db_column = "finish_time", auto_now = True)
    class Meta :
        db_table = "exec_job"

应用程序代码如下:

jobobj = ExecJob(
    #JobId = models.AutoField(db_column = "job_id", primary_key = True)
    Status      = 0,
    #CreateTime = ,               # be commented
    #FinishTime = timezone.now(), # be commented
)
jobobj.save()

Answer 1

您可以在您的模型类

中创建以下方法

def save(self, *args, **kwargs):
    if not self.id:
        self.CreateTime = datetime.datetime.now()
    self.FinishTime = datetime.datetime.now()
    return super(ExecJob, self).save(*args, **kwargs)