Django一些技巧

整数限制范围

from django.core.validators import MaxValueValidator, MinValueValidator

start = models.IntegerField(verbose_name="开始", 
                                     validators=[
                                            MaxValueValidator(24),
                                            MinValueValidator(0)
                                     ])

时间运算

from django.utils import timezone

now = timezone.datetime.now()
#前一天
start = now – timezone.timedelta(hours=24, minutes=0, seconds=0)