django序列化时使用外键的真实值操作

...
{
 fields: 
 {
  uat_date: "2015-07-25",
  statu: "CG",
  name: "慢赢优化",
  tester: [
    1
   ],
  product_manager: 1,
  module: [
    2,
    3
   ],
  project: 1,
  plan_version: 1,
  publish_date: "2015-07-25",
  actual_version: 1,
  type: "XQ",
  developer: [
   1
  ]
 },
 model: "amazingTable.content",
 pk: 1
}
...

...
{
 fields: 
 {
  uat_date: "2015-07-25",
  statu: "CG",
  name: "慢赢优化",
  tester: 
   [
    [
     "kevin"
    ]
   ],
  product_manager: 
   [
    "kevin"
   ],
  module: 
   [
    [
     "closewebbus",
     "我是描述"
    ],
    [
     "xckhapp",
     "我是描述"
    ]
   ],
  project: 1,
  plan_version: 1,
  publish_date: "2015-07-25",
  actual_version: 1,
  type: "XQ",
  developer: [
   [
    "kevin"
   ]
  ]
 },
 model: "amazingTable.content",
 pk: 1
}
...

class ModuleManager(models.Manager):
 def get_by_natural_key(self, name, description):
  return self.get(name = name, description = description)


class Module(models.Model):
 objects = ModuleManager()
 name = models.CharField(max_length=100, unique=True)
 description = models.CharField(max_length=100, blank=True, null=True)

 # natual_key的序列化
 def natural_key(self):
  return (self.name, self.description)

 # natual_keys的解序列化
 class Meta:
  unique_together = (('name', 'description'),)

class Content(models.Model):
 name = models.CharField(max_length=100)
 ...
 module = models.ManyToManyField('Module')


 def natural_key(self):
  return (self.name,) + self.module.natural_key()
 # 和"def"同缩进
 natural_key.dependencies = ['example_app.module']

from django.core.serializers import serialize

class Test(APIView):
 def get(self,request):
 origin_data = Test.objects.all()
 serialized_data = serialize('json',origin_data)
 return HttpResponse(serialized_data )