Django fixtures和AttributeError：'QuerySet'對象沒有屬性<custom_model_method>

我看到這個錯誤，只是一個簡單的集成測試。該django應用程序被稱爲storageadmin與稱爲Disk模型與自定義模型方法稱爲pool_name。我正在使用南和Django休息框架，並有SOUTH_TESTS_MIGRATE = False在settings.pyDjango fixtures和AttributeError：'QuerySet'對象沒有屬性<custom_model_method>

夾具是用此命令創建的。在dumpdata之前，默認數據庫由應用程序填充一些模型，只是足夠用於測試。

./bin/django dumpdata storageadmin oauth2_provider auth.User --indent=2 > src/rockstor /storageadmin/fixtures/storageadmin.json

錯誤涉及下列模型

class Disk(models.Model): 
    pool = models.ForeignKey(Pool, null=True, on_delete=models.SET_NULL) 
    name = models.CharField(max_length=10, unique=True)  

def pool_name(self, *args, **kwargs): 
    try: 
     return self.pool.name 
    except: 
     return None 

class Meta: 
    app_label = 'storageadmin'

有其在視圖用於發送響應

class DiskInfoSerializer(serializers.ModelSerializer): 
    pool_name = serializers.CharField(source='pool_name') 

    class Meta: 
     model = Disk

觀串行器返回像這樣的響應

ds = DiskInfoSerializer(Disk.objects.all()) 
return Response(ds.data)

編輯：如正確答案中所示，問題出現在上述視圖中。我使用的是很舊的DRF（2.1.15），但目前正在測試版本（2.4.3）要求ds = DiskInfoSerializer(Disk.objects.all(), many=True)

簡單的測試案例引發的錯誤是：

class DiskTests(APITestCase): 
    fixtures = ['storageadmin.json'] 
    BASE_URL = '/api/disks/scan' 

    def test_disk_scan(self): 
     self.client.login(username='admin', password='admin') 
     response = self.client.post(self.BASE_URL, data=None, format='json') 
     self.assertEqual(response.status_code, status.HTTP_200_OK)

最後，錯誤是

File "/opt/rock-dep/src/rockstor/storageadmin/views/disk.py", line 88, in _scan 
    return Response(ds.data) 
File "/opt/rock-dep/eggs/djangorestframework-2.4.3-py2.7.egg/rest_framework /serializers.py", line 572, in data 
    self._data = self.to_native(obj) 
File "/opt/rock-dep/eggs/djangorestframework-2.4.3-py2.7.egg/rest_framework/serializers.py", line 351, in to_native 
    value = field.field_to_native(obj, field_name) 
File "/opt/rock-dep/eggs/djangorestframework-2.4.3-py2.7.egg/rest_framework/fields.py", line 336, in field_to_native 
    return super(WritableField, self).field_to_native(obj, field_name) 
File "/opt/rock-dep/eggs/djangorestframework-2.4.3-py2.7.egg/rest_framework/fields.py", line 207, in field_to_native 
    value = get_component(value, component) 
File "/opt/rock-dep/eggs/djangorestframework-2.4.3-py2.7.egg/rest_framework/fields.py", line 58, in get_component 
    val = getattr(obj, attr_name) 
AttributeError: 'QuerySet' object has no attribute 'pool_name'

該代碼工作正常，問題只是在測試它時。

來源

2014-10-29 user3247093

就像錯誤說的那樣，你傳遞了一個查詢集，但是你沒有告訴DRF這就是你在做什麼。您需要通過many=True：

ds = DiskInfoSerializer(Disk.objects.all(), many=True)

來源

2014-10-29 17:50:05

Django fixtures和AttributeError：'QuerySet'對象沒有屬性<custom_model_method>

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