Question

我正在学习Jython上的Django，我在执行Django Tutorial 01时遇到了错误。

我的系统

Windows 7
jython2.7b2
Django的1.7c3
的PostgreSQL-9.3.5-1 - 窗口的x64
的PostgreSQL-9.3-1102.jdbc41.jar

这是我的models.py

的代码

来自django.utils导入时区导入日期时间来自django.db导入模型

class Question(models.Model):
    question_text = models.CharField(max_length=200)
    pub_date = models.DateTimeField('date published')

def __unicode__(self):
    return self.question_text

def was_published_recently(self):
    return self.pub_date >= timezone.now() - datetime.timedelta(days=1)

class Choice(models.Model):
    question = models.ForeignKey(Question)
    choice_text = models.CharField(max_length=200)
    votes = models.IntegerField(default=0)

def __unicode__(self):              # __unicode__ on Python 2
    return self.choice_text

将对象插入数据库后，我尝试以下命令。

>>> q = Question.objects.get(pk=1)
>>> q.was_published_recently()

然后我收到以下错误消息：

Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "C:\Users\michmar3\workspace\pollsite\polls\models.py", line 14, in was_p
ublished_recently
    return self.pub_date >= timezone.now() - datetime.timedelta(days=1)
  File "C:\jython2.7b2\Lib\datetime.py", line 1727, in __ge__
    return self.__cmp(other) >= 0
  File "C:\jython2.7b2\Lib\datetime.py", line 1765, in _datetime__cmp
    raise TypeError("cannot compare naive and aware datetimes")
TypeError: cannot compare naive and aware datetimes

Answer 1

尝试使用datetime.utcnow()代替timezone.now()

django was_published_recently错误TypeError：无法比较天真和感知日期时间

1 个答案: