Question

型号域代码是这个

    created = models.DateTimeField(auto_now=True)


    @property
    def now_diff(self):
        return timezone.now() - self.created

我对使用虚拟字段进行django时间循环有疑问

时间循环的当前输出为5：26：34.349728

但是我想5:26:34

有办法吗？

感谢让我知道〜！

我追到

    @property
    def now_diff(self):
        s=timezone.now() - self.created
        hours, remainder = divmod(s, 3600)
        minutes, seconds = divmod(remainder, 60)
        return '{:02}:{:02}:{:02}'.format(int(hours), int(minutes), int(seconds))

但是出错


TypeError: 'Todo' object is not subscriptable

TypeError: unsupported operand type(s) for divmod(): 'datetime.timedelta' and 'int'

Answer 1

从获得的 timedelta 中减去微秒

from datetime import timedelta


class MyModel(models.Model):
    ...
    created = models.DateTimeField(auto_now=True)

    @property
    def now_diff(self):
        delta = timezone.now() - self.created
        return str(delta - timedelta(microseconds=delta.microseconds))

有关更具可读性的解决方案，

from datetime import timedelta


def chop_microseconds(delta):
    return delta - timedelta(microseconds=delta.microseconds)

class MyModel(models.Model):
    ...
    created = models.DateTimeField(auto_now=True)

    @property
    def now_diff(self):
        return str(chop_microseconds(timezone.now() - self.created))

一些BG事情

如果我们查看 timedelta 类的Source code of __str__()函数，

....
if self._microseconds:
    s = s + ".%06d" % self._microseconds
...

转换timedelta对象的字符串表示形式。
因此，这里我们从timedelta中减去 microsecond ，从而解决了问题：）

Answer 2

也许您可以这样尝试（主要是从this答案中粘贴副本）：

@property
def now_diff(self):
    time_delta = timezone.now() - self.created
    s = time_delta.seconds
    hours, remainder = divmod(s, 3600)
    minutes, seconds = divmod(remainder, 60)
    return '{:02}:{:02}:{:02}'.format(int(hours), int(minutes), int(seconds))

我想更改时间计算格式（Django模型，虚拟字段）

2 个答案:

一些BG事情