我需要根据TextField过滤管理列表。我希望能够为TextField值为Null的所有对象筛选查询集。
我尝试了以下内容:
def filter_for_field(self, request, queryset):
queryset=queryset.exclude(field__isnull=True)
return queryset
我添加了作为我的AdminModel的方法,然后添加了属性“actions = ['filter_for_field']。
我也尝试过没有返回声明,没有骰子。该操作显示在管理员中,但它不会删除TextField的空值对象。
我做错了什么?
有更好的方法吗?
答案 0 :(得分:1)
您可以使用custom FilterSpec功能创建自定义管理过滤器。它现在可以在Django的SVN版本中使用,并计划用于Django 1.4。
from django.contrib.admin import SimpleListFilter
class IsNullFilter(SimpleListFilter):
# Human-readable title which will be displayed in the
# right admin sidebar just above the filter options.
title = _('Custom filter')
# Parameter for the filter that will be used in the URL query.
parameter_name = 'custom_filter'
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 (
('True', _('is Null')),
('False', _('is not Null')),
)
def queryset(self, request, queryset):
"""
Returns the filtered queryset based on the value
provided in the query string and retrievable via
`self.value()`.
"""
if self.value() == 'True':
return queryset.filter(costomfield__isnull=True)
if self.value() == 'True':
return queryset.filter(costomfield__isnull=False)
然后你需要在ModelAdmin.list_filter
中传递它:
class CustomModelAdmin(admin.ModelAdmin):
list_filter = (IsNullFilter,)