当UUIDField是主键时，Tastypie不使用UUID返回URI

我正在使用Django和tastypie来开发REST API，其主键是来自django_extensions的UUIDField . 但是，使主键成为UUID并不适合使用tastypie：当我使用POST创建资源时，它返回的URI是一个int，而不是UUID，然后提供的URI不可用，因为其余的API需要用于访问资源的UUID .

我认为这是因为UUIDField只替换了Django pre_save中UUIDField中的值，而tastypie在此之前返回了头文件 .

我尝试为LocationResource编写自定义get_resource_uri，但传递给该函数的对象还没有UUID（只是正常的自动递增整数主键） .

如何让tastypie为资源返回正确的UUID？有没有更好的方法来制作一个UUID，tastypie会更好？

该模型：

from django.db import models
from django_extensions.db.fields import UUIDField

class Location(models.Model):
    """ Stores information about a location. """

    id = UUIDField(primary_key=True)
    path = models.TextField()

    def __unicode__(self):
        return "{uuid}: {path}".format(uuid=self.id, path=self.path)

tastypie ModelResource（我仍在本地开发，因此身份验证和授权尚未正确设置）：

class LocationResource(ModelResource):
    class Meta:
        queryset = Location.objects.all()
        authentication = Authentication()
        authorization = Authorization()

我所看到的（JSON格式化的可读性）：

$ curl --dump-header - -H "Content-Type: application/json" -X POST --data '{"path": "/path/to/directory/"}' http://localhost:8000/api/v1/location/ 
HTTP/1.0 201 CREATED
Date: Tue, 11 Jun 2013 19:59:07 GMT
Server: WSGIServer/0.1 Python/2.7.3
Vary: Accept
X-Frame-Options: SAMEORIGIN
Content-Type: text/html; charset=utf-8
Location: http://localhost:8000/api/v1/location/1/

$ curl --dump-header - -H "Content-Type: application/json" -X GET http://localhost:8000/api/v1/location/1/
HTTP/1.0 404 NOT FOUND
Date: Tue, 11 Jun 2013 19:59:27 GMT
Server: WSGIServer/0.1 Python/2.7.3
Vary: Accept
X-Frame-Options: SAMEORIGIN
Content-Type: text/html; charset=utf-8

$ curl --dump-header - -H "Content-Type: application/json" -X GET http://localhost:8000/api/v1/location/
HTTP/1.0 200 OK
Date: Tue, 11 Jun 2013 19:59:32 GMT
Server: WSGIServer/0.1 Python/2.7.3
Vary: Accept
X-Frame-Options: SAMEORIGIN
Content-Type: application/json
Cache-Control: no-cache

{"meta": 
    {"limit": 20, "next": null, "offset": 0, "previous": null, "total_count": 1}, 
 "objects": [
    {"id": "5fe23dd4-d2d1-11e2-8566-94de802aa978", 
     "path": "/path/to/directory/", 
     "resource_uri": "/api/v1/location/5fe23dd4-d2d1-11e2-8566-94de802aa978/"
    }
  ]
}