在 Django Admin 中为 list_filter 创建自定义过滤器 [英] Creating Custom Filters for list_filter in Django Admin
问题描述
我想为 django admin 制作自定义过滤器,而不是普通的 'is_staff' 和 'is_superuser'.我在 Django 文档中阅读了这个 list_filter.自定义过滤器以这种方式工作:
I would like to make custom filters for django admin instead of the normal 'is_staff' and 'is_superuser'. I have read this list_filter in Django docs. Custom Filters work in this way:
from datetime import date
from django.utils.translation import ugettext_lazy as _
from django.contrib.admin import SimpleListFilter
class DecadeBornListFilter(SimpleListFilter):
# Human-readable title which will be displayed in the
# right admin sidebar just above the filter options.
title = _('decade born')
# Parameter for the filter that will be used in the URL query.
parameter_name = 'decade'
def lookups(self, request, model_admin):
"""
Returns a list of tuples. The first element in each
tuple is the coded value for the option that will
appear in the URL query. The second element is the
human-readable name for the option that will appear
in the right sidebar.
"""
return (
('80s', _('in the eighties')),
('90s', _('in the nineties')),
)
def queryset(self, request, queryset):
"""
Returns the filtered queryset based on the value
provided in the query string and retrievable via
`self.value()`.
"""
# Compare the requested value (either '80s' or '90s')
# to decide how to filter the queryset.
if self.value() == '80s':
return queryset.filter(birthday__gte=date(1980, 1, 1),
birthday__lte=date(1989, 12, 31))
if self.value() == '90s':
return queryset.filter(birthday__gte=date(1990, 1, 1),
birthday__lte=date(1999, 12, 31))
class PersonAdmin(ModelAdmin):
list_filter = (DecadeBornListFilter,)
但我已经为 list_display 制作了这样的自定义函数:
But i have already made custom functions for list_display like this:
def Student_Country(self, obj):
return '%s' % obj.country
Student_Country.short_description = 'Student-Country'
我是否可以在 list_filter 中使用 list_display 的自定义函数,而不是为 list_filter 编写新的自定义函数?欢迎任何建议或改进.. 需要一些指导...谢谢...
Is it possible i could use the custom functions for list_display in list_filter instead of writing a new custom function for list_filter? Any suggestions or improvements are welcome.. Need some guidance on this... Thanks...
推荐答案
您确实可以通过扩展 SimpleListFilter 将自定义过滤器添加到管理过滤器.例如,如果您想将非洲"的大陆过滤器添加到上面使用的国家/地区管理过滤器,您可以执行以下操作:
You can indeed add custom filters to admin filters by extending SimpleListFilter. For instance, if you want to add a continent filter for 'Africa' to the country admin filter used above, you can do the following:
在 admin.py 中:
In admin.py:
from django.contrib.admin import SimpleListFilter
class CountryFilter(SimpleListFilter):
title = 'country' # or use _('country') for translated title
parameter_name = 'country'
def lookups(self, request, model_admin):
countries = set([c.country for c in model_admin.model.objects.all()])
return [(c.id, c.name) for c in countries] + [
('AFRICA', 'AFRICA - ALL')]
def queryset(self, request, queryset):
if self.value() == 'AFRICA':
return queryset.filter(country__continent='Africa')
if self.value():
return queryset.filter(country__id__exact=self.value())
class CityAdmin(ModelAdmin):
list_filter = (CountryFilter,)
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