linux - 我想按月分组怎么办？在django中

Question

sumary = Profile.objects.values('user_report__created_date__month')

错误无法将关键字“月份”解析为字段。不允许在“created_date”加入。

    class Profile(models.Model):
        first_name = models.CharField(max_length=100, verbose_name=_('Имя'))
        last_name = models.CharField(max_length=100)



class Department(models.Model):
    number = models.IntegerField(default=0)
    name = models.CharField(max_length=150, default=None)

    def __unicode__(self):
        return self.name


class Report(models.Model):
    user = models.ForeignKey(Profile, related_name='user_report')
    department = models.ForeignKey(Department, related_name='report')
    created_date = models.DateTimeField()
    edited_by = models.ForeignKey(User)
    edited_at = models.DateTimeField(default=timezone.now())

    def __unicode__(self):
        return self.department.name

    class Meta:
        verbose_name = _('Отчет')
        verbose_name_plural = _('Отчеты')


class Statistic(models.Model):
    name = models.CharField(max_length=90)
    value = models.IntegerField()
    report = models.ForeignKey(Report, related_name='stat_report')

    def __unicode__(self):
        return self.name

Answer 1

你可能想要这样的东西:

end_date = datetime.datetime.now() - datetime.timedelta(days=31)
start_date = datetime.datetime.now()
summary = Profile.objects.filter(user_report__range=(start_date, end_date))

这是为了获取一个月的用户报告。那是对的吗？如果您想要更准确的答案，请添加更多代码。