我试图过滤一个DateTimeField与日期比较。我的意思是:

MyObject.objects.filter(datetime_attr=datetime.date(2009,8,22))

我得到一个空的查询集列表作为答案,因为(我认为)我没有考虑时间,但我想要“任何时间”。

Django中有简单的方法来做这个吗?

我在datetime中设置了时间,不是00:00。


当前回答

下面是我使用ipython的timeit函数得到的结果:

from datetime import date
today = date.today()

timeit[Model.objects.filter(date_created__year=today.year, date_created__month=today.month, date_created__day=today.day)]
1000 loops, best of 3: 652 us per loop

timeit[Model.objects.filter(date_created__gte=today)]
1000 loops, best of 3: 631 us per loop

timeit[Model.objects.filter(date_created__startswith=today)]
1000 loops, best of 3: 541 us per loop

timeit[Model.objects.filter(date_created__contains=today)]
1000 loops, best of 3: 536 us per loop

Contains似乎更快。

其他回答

请参阅文章Django文档

ur_data_model.objects.filter(ur_date_field__gte=datetime(2009, 8, 22), ur_date_field__lt=datetime(2009, 8, 23))
YourModel.objects.filter(datetime_published__year='2008', 
                         datetime_published__month='03', 
                         datetime_published__day='27')

//在注释后编辑

YourModel.objects.filter(datetime_published=datetime(2008, 03, 27))

不工作,因为它创建了一个时间值设置为0的datetime对象,因此数据库中的时间不匹配。

下面是我使用ipython的timeit函数得到的结果:

from datetime import date
today = date.today()

timeit[Model.objects.filter(date_created__year=today.year, date_created__month=today.month, date_created__day=today.day)]
1000 loops, best of 3: 652 us per loop

timeit[Model.objects.filter(date_created__gte=today)]
1000 loops, best of 3: 631 us per loop

timeit[Model.objects.filter(date_created__startswith=today)]
1000 loops, best of 3: 541 us per loop

timeit[Model.objects.filter(date_created__contains=today)]
1000 loops, best of 3: 536 us per loop

Contains似乎更快。

Model.objects.filter(datetime__year=2011, datetime__month=2, datetime__day=30)

这产生了与使用__year, __month,和__day相同的结果,并且似乎对我有用:

YourModel.objects.filter(your_datetime_field__startswith=datetime.date(2009,8,22))