django 1.2 change_list 中显示ForeignKey中的列

有如下Model

from django.db import models
from django.utils.encoding import force_unicode

# Create your models here.

class People(models.Model):
    name = models.CharField(max_length = 200)
    def __unicode__(self):
        return force_unicode(self.name)

class Buy(models.Model):
    from_people = models.ForeignKey(People, related_name = 'sale')
    to_people = models.ForeignKey(People, related_name = 'buyer')
    price = models.IntegerField()
    def __unicode__(self):
        return force_unicode(u'%s-%s-%s' % (self.from_people, self.to_people, self.price))

欲在Buy对象的admin的change_list页面中显示from_people和to_people的名称,应该怎么做呢?


找到的定制方法如下:
admin.py

import django.contrib.admin.sites as djsite
import django.contrib.admin.options as djopt
from django.utils.encoding import force_unicode
from django.db.models.fields.related import RelatedField
import models as mym

def normal_format(val):
    return force_unicode(u'%s' % val)

def make_func(model, admin_order_field, format_fun = normal_format,
              short_description = None, allow_tags = False,
              use_self = False):
    lst = admin_order_field.split('__')
    def func_internal(self, obj = None):
        if not use_self:
            obj = self
        s = ''
        for s in lst:
            obj = getattr(obj, s, None)
            if not obj:
                return force_unicode(admin_order_field)
        return format_fun(obj)
    if not short_description:
        i = 0
        while i < len(lst):
            s = lst[i]
            i += 1
            model = model._meta.get_field_by_name(s)[0]
            if isinstance(model, RelatedField):
                model = model.rel.to
        short_description = model.verbose_name
    func_internal.short_description = short_description
    func_internal.allow_tags = allow_tags
    func_internal.admin_order_field = admin_order_field
    return func_internal

class PeopleModelAdmin(djopt.ModelAdmin):
    list_display = ['name']

class BuyModelAdmin(djopt.ModelAdmin):
    saler_name = make_func(mym.Buy, 'from_people__name')
    buyer_name = make_func(mym.Buy, 'to_people__name')
    list_display = [saler_name, buyer_name, 'price']

djsite.site.register(mym.People, PeopleModelAdmin)
djsite.site.register(mym.Buy, BuyModelAdmin)

#admin.py end

按照上面的方法修改后,change_list页面中的显示为: