django在修改前的值

Question

我用ifcahnged作为

{% for day in doctor.scheduled_by.all %}
{% ifchanged day.start_day_time %}
<span> {{ day }} </span>
<span>{{ day.start_day_time }} AM - {{ day.end_day_time }} PM</span>
{% endifchanged %}
{% endfor %}

，结果为

Saturday
5:00:00 AM - 14:30:00 PM
Friday
0:09:00 AM - 0:02:00 PM

我想要像

这样的东西

Saturday - Thursday
5:00:00 AM - 14:30:00 PM
Friday - Saturday
0:09:00 AM - 0:02:00 PM

:)(新社区)。

实际上这就是我的模型。py

class DaySchedulePattern(models.Model):
week_day = models.ForeignKey(WeekDays, on_delete=models.CASCADE)
time_slot_duration = models.DurationField()
start_day_time = models.DurationField()
end_day_time = models.DurationField()
doctor = models.ForeignKey(
"account.Doctor", on_delete=models.CASCADE,related_name="scheduled_by"
)
clinic = models.ForeignKey(Clinic, on_delete=models.CASCADE)
active = models.BooleanField(default=True)

Answer 1

你可以使用django内置过滤器:date

假设模板中的day是代码中的DateTime(在模型中没有显示)，它需要首先添加持续时间。

{% for day in doctor.scheduled_by.all %}
{% ifchanged day.start_day_time %}
<span> {{ day }} </span> - <span> {{ day|add:day.end_day_time|date:'l' }}
<span>{{ day.start_day_time }} AM - {{ day.end_day_time }} PM</span>
{% endifchanged %}
{% endfor %}

Answer 2

可能您可以在account.Doctor中设置属性end_day，用于结束日期返回日期值。

@property
def end_day(self):
days, hours, minutes = end_day_time.days, end_day_time.hours, end_day_time.minutes
return day.start_day_time + datetime.timedelta(days=<days>, hours=<hours>).day

{% for day in doctor.scheduled_by.all %}
{% ifchanged day.start_day_time %}
<span> {{ day }} - {{day.end_day}}</span>
<span>{{ day.start_day_time }} AM - {{ day.end_day_time }} PM</span>
{% endifchanged %}
{% endfor %}