Python 我应该如何在我的模型中使用 DurationField?
声明:本页面是StackOverFlow热门问题的中英对照翻译,遵循CC BY-SA 4.0协议,如果您需要使用它,必须同样遵循CC BY-SA许可,注明原文地址和作者信息,同时你必须将它归于原作者(不是我):StackOverFlow
原文地址: http://stackoverflow.com/questions/30222660/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How should I use DurationField in my model?
提问by ealiaj
In my model I want to be able to input duration, like 2 years, 5 months, etc.
在我的模型中,我希望能够输入持续时间,如2 年、5 个月等。
In version 1.8DurationField
was introduced so I tried using that:
在1.8版DurationField
中引入了所以我尝试使用它:
In my model I have
user_validPeriod = models.DurationField()
在我的模型中,我有
user_validPeriod = models.DurationField()
Trying to add a new Userfrom my admin panel, If I try typing something like 2dor 2 daysin the appearing text-field though I get Enter a valid duration
.
尝试从我的管理面板添加新用户,如果我尝试在出现的文本字段中输入2d或2 days之类的内容,但我得到Enter a valid duration
.
Can someone provide me with an example of how this field is supposed to be used?
有人可以为我提供一个应该如何使用该字段的示例吗?
采纳答案by Charlesthk
To use a DurationField in django 1.8 you have to use a python datetime.timedelta
instance like this:
要在 django 1.8 中使用 DurationField,您必须使用这样的 pythondatetime.timedelta
实例:
Considering this model :
考虑到这个模型:
from django.db import models
class MyModel(models.Model):
duration = models.DurationField()
You can set a duration this way :
您可以通过这种方式设置持续时间:
import datetime
my_model = MyModel()
my_model.duration = datetime.timedelta(days=20, hours=10)
And query it this way :
并以这种方式查询:
# Equal
durations = MyModel.objects.filter(duration=datetime.timedelta(*args, **kwargs))
# Greater than or equal
durations = MyModel.objects.filter(duration__gte=datetime.timedelta(*args, **kwargs))
# Less than or equal
durations = MyModel.objects.filter(duration__lte=datetime.timedelta(*args, **kwargs))
More info on datetime.timedelta hereand on DurationField here.
在datetime.timedelta更多信息这里和DurationField这里。
In your admin panel, you can enter a duration with a string with following format : [DD] [[hh:]mm:]ss
在您的管理面板中,您可以使用以下格式的字符串输入持续时间: [DD] [[hh:]mm:]ss