在django模板中显示timedelta对象

Question

我无法让我的django模板始终显示timedelta对象.我尝试在模板中使用时间过滤器,但是当我这样做时没有显示任何内容.如果我使用Assert False,timedelta对象在错误页面上显示如下:

time    datetime.timedelta(0, 38, 132827)

这会将时差显示为:

0:00:38.132827

我想只显示每个timedelta对象的小时,分​​钟和秒.有没有人对我如何做到这一点有任何建议？

Answer 1

我按照彼得的建议写了一个自定义模板过滤器。

这是我采取的步骤。

首先，我按照本指南创建自定义模板过滤器。

请务必阅读本节有关代码布局的内容。

这是我的过滤器代码

from django import template

register = template.Library()

@register.filter()
def smooth_timedelta(timedeltaobj):
    """Convert a datetime.timedelta object into Days, Hours, Minutes, Seconds."""
    secs = timedeltaobj.total_seconds()
    timetot = ""
    if secs > 86400: # 60sec * 60min * 24hrs
        days = secs // 86400
        timetot += "{} days".format(int(days))
        secs = secs - days*86400

    if secs > 3600:
        hrs = secs // 3600
        timetot += " {} hours".format(int(hrs))
        secs = secs - hrs*3600

    if secs > 60:
        mins = secs // 60
        timetot += " {} minutes".format(int(mins))
        secs = secs - mins*60

    if secs > 0:
        timetot += " {} seconds".format(int(secs))
    return timetot

然后在我的模板中

{% load smooth_timedelta %}

{% timedeltaobject|smooth_timedelta %}

输出示例

Answer 2

据我所知，您必须为此编写自己的模板标签。下面是我根据 Django 核心 timesince/timeuntil 代码编写的代码，它应该输出您想要的内容：

@register.simple_tag
def duration( duration ):
"""
Usage: {% duration timedelta %}
Returns seconds duration as weeks, days, hours, minutes, seconds
Based on core timesince/timeuntil
"""

    def seconds_in_units(seconds):
    """
    Returns a tuple containing the most appropriate unit for the
    number of seconds supplied and the value in that units form.

    >>> seconds_in_units(7700)
    (2, 'hour')
    """

        unit_totals = OrderedDict()

        unit_limits = [
                       ("week", 7 * 24 * 3600),
                       ("day", 24 * 3600),
                       ("hour", 3600),
                       ("minute", 60),
                       ("second", 1)
                        ]

        for unit_name, limit in unit_limits:
            if seconds >= limit:
                amount = int(float(seconds) / limit)
                if amount != 1:
                    unit_name += 's' # dodgy pluralisation
                unit_totals[unit_name] = amount
                seconds = seconds - ( amount * limit )

        return unit_totals;


if duration:
    if isinstance( duration, datetime.timedelta ):
        if duration.total_seconds > 0:
            unit_totals = seconds_in_units( duration.total_seconds() )
            return ', '.join([str(v)+" "+str(k) for (k,v) in unit_totals.iteritems()])

return 'None'