Django内置的filter有很多，然而我们由于业务逻辑的特殊要求，有时候仍然会不够用，这个时候就需要我们自定义filter来实现相应的内容。接下来让我们从自定义一个get_range(value)来产生列表的filter开始吧。

首先在你的django app的models.py的同级目录建立一个templatetags的文件夹，并在里面新建一个init.py的空文件，这个文件确保了这个文件夹被当做一个python的包。在添加了templatetags模块之后，我们需要重新启动服务器才能使其有效。

polls/ __init__.py models.py templatetags/ __init__.py views.py

然后在templatetags中新建一个python文件，文件名就是以后需要加载到页面的自定义库的名字。在这里我们新建一个generalfilters.py文件。

polls/ __init__.py models.py templatetags/ __init__.py generalfilters.py views.py

为了让库生效，必须在文件里添加一个模块级别的register变量。它是template.Library的实例，确保了标签和过滤器的有效性。

编辑generalfilters.py，添加

from django import templateregister=template.Library()@register.filterdef get_range(value): return range(value)

上述代码中定义了一个生成列表的函数，@register.filter表示这个函数是一个过滤器。至此我们的生成列表的过滤器就已经写好了。接下来我们需要把这个过滤器的库加载到模板里。

在你想要使用的模板的顶部加上{% load generalfilters %}，就可以使用这个过滤器了。

{% for i in 5|get_range_bet_within %} {{i}}{% endfor %}

运行结果

补充知识：Django 自定义筛选器：重写DateFieldListFilter

我就废话不多说了，大家还是直接看代码吧！

class MyDateTimeFilter(admin.filters.DateFieldListFilter): def __init__(self, *args, **kwargs): super(MyDateTimeFilter, self).__init__(*args, **kwargs) now = timezone.now() # When time zone support is enabled, convert "now" to the user's time # zone so Django's definition of "Today" matches what the user expects. if timezone.is_aware(now): now = timezone.localtime(now) filter_end_date = now.replace(hour=0, minute=0, second=0, microsecond=0) filter_start_date_for_one_week = filter_end_date - datetime.timedelta(days=7) month_with_day31 = [1,3,5,7,8,10,12] if filter_end_date.month in month_with_day31 and filter_end_date.day == 31 and filter_end_date.month != 3: if filter_end_date.month == 1: filter_start_date_for_one_month = filter_end_date.replace(year=filter_end_date.year-1, month=12) else: filter_start_date_for_one_month = filter_end_date.replace(month=filter_end_date.month-1, day=30) elif filter_end_date.month == 3 and filter_end_date.day in [29, 30, 31]: if is_leap_year(filter_end_date.year): filter_start_date_for_one_month = filter_end_date.replace(month=filter_end_date.month-1, day=29) else: filter_start_date_for_one_month = filter_end_date.replace(month=filter_end_date.month-1, day=28) else: if filter_end_date.month == 1: filter_start_date_for_one_month = filter_end_date.replace(year=filter_end_date.year-1, month=12) else: filter_start_date_for_one_month = filter_end_date.replace(month=filter_end_date.month-1) filter_start_date_for_six_month = '' filter_start_date_for_six_month_month = (filter_end_date.month - 6 + 12) % 12 if filter_start_date_for_six_month_month == 0: filter_start_date_for_six_month_month = 12 if filter_start_date_for_six_month_month in month_with_day31: if filter_end_date.month > 6: filter_start_date_for_six_month = filter_end_date.replace(month=filter_start_date_for_six_month_month) else: filter_start_date_for_six_month = filter_end_date.replace(year=filter_end_date.year-1, month=filter_start_date_for_six_month_month) elif filter_start_date_for_six_month_month == 2: if filter_end_date.day in [29, 30, 31]: if is_leap_year(filter_end_date.year): filter_start_date_for_six_month = filter_end_date.replace(month=filter_start_date_for_six_month_month, day=29) else: filter_start_date_for_six_month = filter_end_date.replace(month=filter_start_date_for_six_month_month, day=28) else: filter_start_date_for_six_month = filter_end_date.replace(month=filter_start_date_for_six_month_month) else: if filter_end_date.day == 31 and filter_end_date.month >6: filter_start_date_for_six_month = filter_end_date.replace(month=filter_start_date_for_six_month_month, day=30) elif filter_end_date.day == 31 and filter_end_date.month <=6: filter_start_date_for_six_month = filter_end_date.replace(year=filter_end_date.year-1, month=filter_start_date_for_six_month_month, day=30) elif filter_end_date.day <31 and filter_end_date.month >6: filter_start_date_for_six_month = filter_end_date.replace(month=filter_start_date_for_six_month_month) else: filter_start_date_for_six_month = filter_end_date.replace(year=filter_end_date.year-1, month=filter_start_date_for_six_month_month) filter_end_date = filter_end_date + datetime.timedelta(days=1) self.links = (( ('------', {}), ('Past week', { self.lookup_kwarg_since: str(filter_start_date_for_one_week), self.lookup_kwarg_until: str(filter_end_date), }), ('Past month', { self.lookup_kwarg_since: str(filter_start_date_for_one_month), self.lookup_kwarg_until: str(filter_end_date), }), ('Past 6 months', { self.lookup_kwarg_since: str(filter_start_date_for_six_month), self.lookup_kwarg_until: str(filter_end_date), }), ('All', {}), ))

以上这篇在Django中自定义filter并在template中的使用详解就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。