JSON 使用 simplejson 序列化 Django 模型

I'd like to use simplejson to serialize a Django model. Django's serializer doesn't support dictionaries... and simplejson doesn't support Django Querysets. This is quite a conundrum.

In the model there's sponsors that have a Foreign Key to sponsor level, I'm trying to group all the sponsors that belong to a certain sponsor level together. Here's the code that generates the list:

from django.shortcuts import get_list_or_404
from special_event.models import Sponsor, SponsorLevel

sponsor_dict = {}

roadie_sponsors = get_list_or_404(Sponsor, level__category = SponsorLevel.ROADIE_CHOICE)

for item in roadie_sponsors:
    try:
        sponsor_dict[item.level.name].append(item)
    except KeyError:
        sponsor_dict[item.level.name] = [item]

这是sponsor_dict"造"后的样子

{
    'Fan': [<Sponsor: Fan Sponsor>], 
    'VIP': [<Sponsor: VIP Sponsor>],
    'Groupie': [<Sponsor: Groupie Sponsor>],
    'Silver': [<Sponsor: Silver Sponsor>],
    'Bronze': [<Sponsor: Another Bronze Sponsor>, <Sponsor: Bronze Sponsor>]
}

我只在每个级别中添加了一个赞助商，除了铜牌，只是为了展示它是如何工作的.我只想把它"全部"转换成JSON，这样jQuery就可以轻松地解释它.Django的其他序列化程序(如XML或YAML)可以实现这一点吗？我可以"扩展"Django JSON序列化程序来处理字典，还是"扩展"simplejson来处理Django QuerySet对象？