0

我正在尝试从 REST API Django-piston 在我的数据库中插入一个新值。

我有以下型号

class Mobile_User(models.Model):
id       = models.CharField(primary_key=True, max_length=255, unique=True)
email    = models.EmailField()
name     = models.CharField(max_length=300)

def __unicode__(self):
    return u"%s - %s" % (self.id, self.email)

class Mobile_User_Business(models.Model):
mobile_user_id = models.ForeignKey(Mobile_User)
business_id = models.ForeignKey(Business)

def __unicode__(self):
    return u"%s - %s" % (self.business_id, self.mobile_user_id)

和 handlers.py

def create(self, request):
    """
    Creates a new Mobile_User.
    """
    if not hasattr(request, "data"):
        request.data = request.POST
    attrs = self.flatten_dict(request.data)
    if self.exists(**attrs):
        msj = "The user mobile already exist"
        return msj
    else:
        mobile_user_business = Mobile_User_Business(mobile_user_id=attrs['mobile_user_id'], 
                        business_id=attrs['business_id'],)
        mobile_user_business.save()
        return mobile_user_business

发送信息:

curl -u myuser:12345 -X POST -d mobile_user_id="21221212" -d business_id="1" http://mydomain.com/api/newuser/

并返回:


回溯(最近一次通话最后):

文件“/dir/www/djangotest/apps/api/handlers.py”,第 122 行,在 create business_id=attrs['business_id'],)

文件“/usr/local/lib/python2.7/dist-packages/django/db/models/base.py”,第 352 行,在init setattr(self, field.name, rel_obj)

文件“/usr/local/lib/python2.7/dist-packages/django/db/models/fields/related.py”,第 331 行,在set self.field.name, self.field.rel.to._meta 中.object_name))

ValueError:无法分配“u'21221212'”:“Mobile_User_Business.mobile_user_id”必须是“Mobile_User”实例。


任何的想法??

谢谢!

4

1 回答 1

1

那是因为您试图为 mobile_user_id 分配一个 unicode 值,但 django 需要一个 Mobile_User 实例。

你应该把它改成这样:

...
else:
    # First get the instances
    mobile_user = Mobile_User.objects.get(pk=attrs['mobile_user_id'])
    business = Business.objects.get(pk=attrs['business_id'])

    # Then use them in this model
    mobile_user_business = Mobile_User_Business(mobile_user_id=mobile_user, 
                    business_id=business,)
    mobile_user_business.save()
    return mobile_user_business
于 2012-05-02T09:33:32.210 回答