我知道我可以将当前日期设为 str
在 Django 模板中(使用 template tag now
),像这样:
{% now "Y-m-d" as today_str %}
<p>{{ today_str }}</p>
但我不能将其用于比较:
{% now "Y-m-d" as today_str %}
{% for elem in object_list %}
{% if elem.date < today_str %} {# WRONG: this compares 'date' and 'str' #}
<p>{{ elem.pk }} before today</p>
{# do some other rendering #}
{% endif %}
{% endfor %}
可能的解决方案:
# in my class-based-view in 'views.py'
def get_context_data(self, **kwargs):
ctx = super().get_context_data(**kwargs)
ctx['today'] = timezone.now()
return ctx
正如你所看到的,我有解决我的问题的方法,但我想知道是否有一种内置的方式来获取当前的
date
(或 datetime
)在模板中?
最佳答案
所以,我所有的搜索都没有产生一个简短的解决方案。问题的答案似乎是:不,没有内置方法可以将当前日期(或日期时间)作为模板中的变量。
如果其他人正在搜索此主题,我将尝试总结我可以采用的以及其他用户建议的可能解决方法。
# file 'my_app/views.py'
from django.utils import timezone as tz
from django.views.generic import ListView
class MyView(ListView)
...
def get_context_data(self, **kwargs):
ctx = super().get_context_data(**kwargs)
now = tz.now()
ctx['now'] = now
ctx['today'] = tz.localtime(now).date()
return ctx
# file 'context_processors.py'
from django.utils import timezone as tz
def now_and_today(request):
now = tz.now()
return {
'now': now,
'today': tz.localtime(now).date(),
}
# file 'settings.py'
...
TEMPLATES = [
{
...
'OPTIONS': {
'context_processors': [
...
'context_processors.now_and_today',
],
},
},
]
...
# file 'my_app/custom_template_tags/custom_time_tags.py'
from django.utils import timezone as tz
from django import template
register = template.Library()
@register.simple_tag
def get_now(request):
return tz.now()
@register.simple_tag
def get_today(request):
return tz.localtime(tz.now()).date()
像这样使用: {% load 'custom_time_tags' %}
{% get_today as today %}
{% for per in person_list %}
{% if per.brith_date > today %}
<p>{{ per.name }} is from the future!!<p>
{% endif %}
{% endfor %}
cached_property
): # file 'models.py'
from django.db import models
from django.utils import timezone as tz
from django.utils.functional import cached_property
class Person(models.Model):
...
@cached_property
def is_from_future(self):
# careful: for long-lived instances do not use 'cached_property' as
# the time of 'now' might not be right later
if self.birth_date > tz.localtime(tz.now()).date():
return True
return False
# file 'my_app/views.py'
from django.utils import timezone as tz
def person_list(request):
today = tz.localtime(tz.now()).date()
person_list = []
for p in Person.objects.all():
p.is_from_future = self.birth_date > today
person_list.append(p)
return render(request, 'some_template.html', {'person_list': person_list})
关于python - Django 模板 - 是否有内置方法可以将当前日期作为 'date' 类型而不是 'str' 类型获取?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/52296306/