django技巧

• 关于时间:

  timezone.localtime(timezone.now())
  delta = datetime.timedelta(days=-50)
  

• 关于整形大小
  限制整形字段大小. 使用 decimal 替换integer

  If you want to specify exactly the parameters of a numeric database column, use DecimalField.

• js 怎么拼接两个空格

• 更新指定字段的值

  user.last_login = timezone.now()
  user.save(update_fields=['last_login'])
  

• model属性

    from django.utils.translation import gettext_lazy as _
  
    class Meta:
          verbose_name = _('permission')
          verbose_name_plural = _('permissions')
          unique_together = (('content_type', 'codename'),)
          ordering = ('content_type__app_label', 'content_type__model',
                'codename')
  

• 批量创建对象

querysetlist=[]
for i in resultlist:
    querysetlist.append(Account(name=i))        

Account.objects.bulk_create(querysetlist)