Django Admin，Django 1.2中日期字段的自定义过滤器

问题描述

|| 这对于Django 1.2仍然有效吗？ Django 1.3或更低版本上Django Admin中的自定义过滤器 我已经尝试过了，但是admin类中的list_filter选项无法识别我的自定义过滤器。 应如何将自定义过滤器添加到list_filter以便显示？

    class MyModelAdmin(admin.ModelAdmin):
        ...
        list_filter = [\'is_expired_filter\']

这是我的\'is_expired_filter \'是我新注册的自定义过滤器，作者说的就是这样：

    list_filter = (\'is_live\')

但这无法被Django识别，并且加载管理页面时出现的错误是   异常类型：配置不正确   异常值：\'PositionAdmin.list_filter [2] \'引用模型\'Position \'中缺少的字段'is_expired_filter \' 也许我的错误是我不确定该问题的作者一旦实现了自定义过滤器后将如何使用原始代码。 这是原始代码：

    def is_live(self):
        if self.when_to_publish is not None:
            if ( self.when_to_publish < datetime.now() ):
                return \"\"\" <img alt=\"True\" src=\"/media/img/admin/icon-yes.gif\"/> \"\"\"
        else:
            return \"\"\" <img alt=\"False\" src=\"/media/img/admin/icon-no.gif\"/> \"\"\"      

    is_live.allow_tags = True

    

解决方法

        既然我已经掌握了我想您想要的东西，我假设您有一个想要通过DateField过滤的模型，例如：

class Position(models.Model):
    expiration_date = models.DateField()
    ...

您现在应该修改为

class Position(models.Model):
    expiration_date = models.DateField()
    expiration_date.is_expired_filter = True
    ...

您要做的就是将新的过滤器类添加到admin.py中

from django.contrib.admin.filterspecs import FilterSpec,DateFieldFilterSpec
from django.utils.translation import ugettext as _
from datetime import datetime,date
class ExpiredFilterSpec(DateFieldFilterSpec):
    \"\"\"
    Adds filtering by future and previous values in the admin
    filter sidebar. Set the is_expired_filter filter in the model field
    attribute \'is_expired_filter\'.
    my_model_field.is_expired_filter = True
    \"\"\"
    def __init__(self,f,request,params,model,model_admin,**kwargs):
        super(ExpiredFilterSpec,self).__init__(f,**kwargs)
        today = date.today()
        self.links = (
            (_(\'All\'),{}),(_(\'Not Expired\'),{\'%s__lt\' % self.field.name: str(today),}),(_(\'Expired\'),{\'%s__gte\' % self.field.name: str(today),}))
    def title(self):
        return \"Filter By Expiration Date\"
# registering the filter
FilterSpec.filter_specs.insert(0,(lambda f: getattr(f,\'is_expired_filter\',False),ExpiredFilterSpec))


class PositionAdmin(admin.ModelAdmin):
    list_filter = [\'expiration_date\']

    ,        我几乎在Django 1.3或以下版本的Django Admin中逐字复制您的链接Custom Filter，我想到了这个。

from django.contrib.admin.filterspecs import FilterSpec,ChoicesFilterSpec,DateFieldFilterSpec
from django.utils.encoding import smart_unicode
from django.utils.translation import ugettext as _
from datetime import datetime

class IsExpiredFilterSpec(DateFieldFilterSpec):
    \"\"\"
    Adds filtering by future and previous values in the admin
    filter sidebar. Set the is_expired_filter filter in the model field 
    attribute \'is_expired_filter\'.
    my_model_field.is_expired_filter = True
    \"\"\"

    def __init__(self,model_admin):
        super(IsExpiredFilterSpec,model_admin)
         # -- You\'ll need to edit this to make it do what you want. --
#        today = datetime.now()
#        self.links = (
#            (_(\'Any\'),#            (_(\'Yes\'),{\'%s__lte\' % self.field.name: str(today),#                       }),#            (_(\'No\'),#                    }),#            
#        )


    def title(self):
        return \"Is Expired\"

\\# registering the filter
FilterSpec.filter_specs.insert(0,IsExpiredFilterSpec))

class MyModelAdmin(admin.ModelAdmin):
    ...
    MODEL_FIELD_TO_FILTER.is_expired_filter = True
    list_filters = [\'MODEL_FIELD_TO_FILTER\']

更新：感谢jimbob进行了更改。 MODEL_FIELD_TO_FILTER将是您要过滤的字段。