Python tastypie-模型''；具有空属性

当使用fields.ToManyField（）执行反向关系时，我在单击

http://localhost:8080/api/v1/environment_test_device/?format=json

我看到了

The model '' has an empty attribute 'device_type_set' and doesn't allow a null value.

我想知道为什么模型是“”。我猜我的api路径设置不正确。是否有方法验证文件路径是否正确，或者为什么会出现此错误？我真的不明白“设备类型集”应该叫什么。我正在查看，但“author_set”实际上与给定示例中的任何内容都不对应

我的模型是

class DeviceType(models.Model):
    device_type_id = models.AutoField(primary_key=True)
    device_name = models.CharField(max_length=255, unique=True)
    class Meta:
        db_table = u'device_type'

class Environment(models.Model):
    environment_id = models.AutoField(primary_key=True)
    environment_name = models.CharField(max_length=255, unique=True)
    class Meta:
        db_table = u'environment'

class Test(models.Model):
    test_id = models.AutoField(primary_key=True)
    test_name = models.CharField(max_length=255, unique=True)
    class Meta:
        db_table = u'test'

class EnvironmentTestDevice(models.Model):
    environment_test_device_id = models.IntegerField(primary_key=True)
    environment = models.ForeignKey(Environment)
    test = models.ForeignKey(Test)
    device_type = models.ForeignKey(DeviceType)
    class Meta:
        db_table = u'environment_test_device'

我的api.py是

class DeviceTypeResource(ModelResource):
    environment_test_device = fields.ToManyField('resources.EnvironmentTestDeviceResource', 'device_type_set', related_name = 'device_type', full=True)
    class Meta:
        queryset = DeviceType.objects.all()
        authorization = Authorization()
        resource_name = 'device_type'

class EnvironmentResource(ModelResource):
    class Meta:
        queryset = Environment.objects.all()
        authorization = Authorization()
        resource_name = 'environment'

class TestResource(ModelResource):
    class Meta:
        queryset = Test.objects.all()
        authorization = Authorization()
        resource_name = 'test'

class EnvironmentTestDeviceResource(ModelResource):
    device_type = fields.ForeignKey(DeviceTypeResource, 'device_type', full=True, null=True)
    test = fields.ForeignKey(TestResource, 'test', full=True, null=True)
    environment = fields.ForeignKey(EnvironmentResource, 'environment', full=True, null=True)

    class Meta:
        queryset = PipelineTestDevice.objects.all()
        authorization = Authorization()
        resource_name = 'environment_test_device'

在下一行的旁注上

 environment_test_device = fields.ToManyField('resources.EnvironmentTestDeviceResource', 'device_type_set', related_name = 'device_type', full=True)

我已经把它注释掉了，我能够得到正确的json响应，但我假设我需要反向关系。我还尝试将“resources.EnvironmentTestDeviceResource”设置为

---

“project.api.resources.EnvironmentTestDeviceResource”和“project.api.EnvironmentTestDeviceResource”并收到相同的错误响应。”project'是我的应用程序的名称

我认为问题在于属性的名称。使用

设备类型设置

代替

设备类型设置

。但您应该在Django shell中进行测试。这里的path.to.api应该是什么？

environment_test_device = fields.ToManyField('EnvironmentTestDeviceResource', 'devicetype_set', related_name = 'device_type', full=True)