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从本质上讲，我的问题是，无论我过滤什么，以下设置都会在管理页面中返回整个查询集。

模型.py

from django.db import models

class Booking(models.model):
    client = models.ForeignKey(Client)
    reference = models.CharField(max_length=100)
    ....

    def __unicode__(self):
        return self.reference

class Client(models.Model):
    name = models.CharField(max_length=100)
    email = models.EmailField(null=True, blank=True)
    ...

    def __unicode__(self):
        return self.name  

    def total_bookings(self):
        return len(self.booking_set.all())

    def bookings0(self):
        if self.total_bookings() == 0:
            return True

    def bookings1(self):
        if self.total_bookings() == 1:
            return True

    def bookings2(self):
        if self.total_bookings() == 2:
            return True

    def bookings3plus(self):
        if self.total_bookings() > 2:
            return True

...

管理员.py

from django.contrib import admin
from django.contrib.admin import SimpleListFilter
from django.utils.translation import ugettext_lazy as _
from clakes.models import Client, Booking ...

class BookingAdmin(admin.ModelAdmin):
    ...

class NumBookingListFilter(SimpleListFilter):
    title = _('Number of Bookings')
    parameter_name = 'numofbooks'

    def lookups(self, request, model_admin):
        return (
            ('no', _('No Bookings')),
            ('1', _('One')),
            ('2', _('Two')),
            ('3plus', _('Three or more')),
        )

    def queryset(self, request, queryset):
        if self.value() == 'no':
            return [x for x in queryset if x.bookings0()]
        if self.value() == '1':
            return [x for x in queryset if x.bookings1()]
        if self.value() == '2':
            return [x for x in queryset if x.bookings2()]
        if self.value() == '3plus':
            return [x for x in queryset if x.bookings3plus()]

class ClientAdmin(admin.ModelAdmin):
    list_display = ('name', 'email', 'total_bookings', ...)
    search_fields = ['name']
    list_filter = (NumBookingListFilter,)
    ...

...
admin.site.register(Client, ClientAdmin)
admin.site.register(Booking, BookingAdmin)

有人可以向我解释我哪里出错了。The filter appears on the 'Client' admin page as expected, but when one option is selected the filter does not work - the url changes to http:.../client/?e=1 but no filtering has occurred as it should. 我的列表理解在 shell 中工作 - 例如 [x for x in queryset if x.bookings1()] 返回正确的客户端列表。

我很乐意考虑使用管理器或其他方式的不同方法。谁好心回答，请不要只指出文档，因为我现在已经花了几个小时阅读和重新阅读它，所以如果我错过了这一点，那是由于缺乏理解而不是努力。

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1 回答 1

4

因此，可能有更简洁的方式来处理整个事情，但以下内容对我有用：

管理员.py

if self.value() == 'no':
        l = [x.id for x in queryset if x.bookings0()]
        return queryset.filter(pk__in=l)
if self.value() == '1':
        l = [x.id for x in queryset if x.bookings1()]
        return queryset.filter(pk__in=l)
...etc...

我希望这对某人有所帮助。

于 2013-08-16T19:43:33.830 回答