TastyPie：相关资源 returns NULL

Question

我有扩展 Django 的 User 模型的 UserProfile 模型：

class UserProfile(models.Model):
    user = models.OneToOneField(User, related_name="profile")
    avatar = models.CharField(max_length=40, default='0')
    activation_key = models.CharField(max_length=40, blank=True)
    key_expires = models.DateTimeField(default=django.utils.timezone.now)

    def __str__(self):
        return self.user.username

    class Meta:
        verbose_name_plural = u'User profiles'

我有两个资源：

class UserProfileResource(ModelResource):
    class Meta:
        queryset = UserProfile.objects.all()
        resource_name = 'profile'
        allowed_methods = ['get']

和

class UserResource(ModelResource):
    profile = fields.ToOneField('api.api.UserProfileResource',
                                'profile', full=True, null=True)
    class Meta:
        queryset = User.objects.all()
        #fields = ['first_name', 'last_name', 'email', 'date_joined', 'profile']
        fields = [ 'profile' ]
        allowed_methods = ['get', 'post']
        resource_name = 'user'
        authentication = SessionAuthentication()
        authorization = DjangoAuthorization()
        detail_uri_name = 'username'

    def obj_create(self, bundle, **kwargs):
        return super(UserResource, self).obj_create(bundle, user=bundle.request.user)

    def authorized_read_list(self, object_list, bundle):
        return object_list.filter(user=bundle.request.user)

我正在尝试发出 GET 请求：

http://localhost:8000/api/v1/user/<some_username>

我收到：

Object { profile: null, resource_uri: "/api/v1/user/<some_username>/" }

配置文件为 NULL 是正确的，因为我的 UserResource 中有一个属性 null=True。响应为空，这就是我收到 NULL 的原因。但是我该如何解决这个问题呢？怎么了？

可能是项目结构的问题？资源文件是：

<project_name>/api/api.py

Answer 1

无意中找到了决定。型号：

class UserProfile(models.Model):
    user = models.OneToOneField(User)
    avatar = models.CharField(max_length=40, default='0')
    activation_key = models.CharField(max_length=40, blank=True)
    key_expires = models.DateTimeField(default=django.utils.timezone.now)

    def __str__(self):
        return self.user.username

    class Meta:
        verbose_name_plural = u'User profiles'

资源：

class UserProfileResource(ModelResource):

    class Meta:
        queryset = UserProfile.objects.all()
        authentication = SessionAuthentication()
        authorization = DjangoAuthorization()
        allowed_methods = ['get', 'post']
        resource_name = 'profile'
        include_resource_uri = False

class UserResource(ModelResource):
    userprofile = fields.ToOneField(UserProfileResource, 'userprofile', null=True, full=True)

    class Meta:
        queryset = User.objects.all()
        fields = ['first_name', 'last_name', 'email', 'date_joined', 'userprofile']
        allowed_methods = ['get', 'post']
        resource_name = 'user'
        detail_uri_name = 'username'
        authentication = SessionAuthentication()
        authorization = DjangoAuthorization()

如您所见，这一行很重要：

userprofile = fields.ToOneField(UserProfileResource, 'userprofile', null=True, full=True)

此属性 (userprofile) 的名称应等于模型的名称 (UserProfile)。

GET 请求：

http://localhost:8000/api/v1/user/<some_username>

回复：

{
    "date_joined": "2016-03-01T08:22:40", 
    "email": "test@test.test", 
    "first_name": "Ivan", 
    "last_name": "Ivan", 
    "resource_uri": "/api/v1/user/<some_username>/", 
    "userprofile": {
        "activation_key": "...", 
        "avatar": "...", 
        "id": 22, 
        "key_expires": "2016-03-14T17:11:01"
    }
}

TastyPie：相关资源 returns NULL

TastyPie: related resource returns NULL

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