Python 断言错误：400！=201在运行测试用例时

我是Django的新手。当我运行命令python manage.py test时，我不断收到以下错误

Tact/tact_api/lines/test_views.py", line 103, in 
test_api_can_create_an_event
self.assertEqual(self.response.status_code, status.HTTP_201_CREATED)
AssertionError: 400 != 201

----------------------------------------------------------------------
Ran 8 tests in 0.105s

class EventSerializer(serializers.HyperlinkedModelSerializer):
"""
Convert Event model instance into native Python datatypes to be rendered as JSON.
"""
owner = serializers.ReadOnlyField(source='owner.username')

class Meta:
    model = Event
    fields = ('url', 'id', 'owner', 'created', 'modified', 'title', 'desc', 'start',
              'end', 'line')

def get_fields(self, *args, **kwargs):
    """
    create and return a new Event object (linked to a user owned Line) with validated data.

    update and return an existing Event object with validated data.
    """
    fields = super(EventSerializer, self).get_fields(*args, **kwargs)
    view = self.context['view']
    owner = view.request.user
    fields['line'].queryset = fields['line'].queryset.filter(owner=owner)
    return fields

class EventSerializer(serializers.ModelSerializer) 

我真的非常感谢任何帮助解决这个问题！我自己的一些想法包括：

1） 我的事件对象post请求中可能存在语法错误。请参阅下面的测试代码。 2） 该问题可能与配置有关

参考请参见下面的测试

class EventViewTestCase(TestCase):
"""
Test suite for Event API views
"""
def setUp(self):
    """
    Define the event test client and other test variables.
    """
    user = User.objects.create(username="tactician")

    # initialize client and force authentication
    self.client = APIClient()
    self.client.force_authenticate(user=user)

    # create and post a new line using authorized user
    # since user model instance is not serializable, use its Id/PK
    self.line_data = {'owner': user.id, 'title': 'Title goes here'}
    self.res = self.client.post(reverse('line-list'), self.line_data, format='json')

    # create and post a new event linked to created line using authorized user
    line = Line.objects.get()
    self.event_data = {'owner': user.id, 'pk': line.id, 'title': 'Title goes here',
                       'desc': 'Desc. here', 'start': timezone.now(), 'end': timezone.now()}
    self.response = self.client.post(reverse('event-list'), self.event_data, format='json')

def test_api_can_create_an_event(self):
    """
    Test the api has event creation capability.
    """
    self.assertEqual(self.response.status_code, status.HTTP_201_CREATED)

序列化程序

Tact/tact_api/lines/test_views.py", line 103, in 
test_api_can_create_an_event
self.assertEqual(self.response.status_code, status.HTTP_201_CREATED)
AssertionError: 400 != 201

----------------------------------------------------------------------
Ran 8 tests in 0.105s

class EventSerializer(serializers.HyperlinkedModelSerializer):
"""
Convert Event model instance into native Python datatypes to be rendered as JSON.
"""
owner = serializers.ReadOnlyField(source='owner.username')

class Meta:
    model = Event
    fields = ('url', 'id', 'owner', 'created', 'modified', 'title', 'desc', 'start',
              'end', 'line')

def get_fields(self, *args, **kwargs):
    """
    create and return a new Event object (linked to a user owned Line) with validated data.

    update and return an existing Event object with validated data.
    """
    fields = super(EventSerializer, self).get_fields(*args, **kwargs)
    view = self.context['view']
    owner = view.request.user
    fields['line'].queryset = fields['line'].queryset.filter(owner=owner)
    return fields

class EventSerializer(serializers.ModelSerializer) 

---

这个问题现在已经解决了

首先，在我的测试套件中，我提供给post请求的事件负载数据中有一个轻微的语法错误

self.event_data = {'owner': user.id, 'pk': line.id...}

改为（行是在我的事件模型中指定的外键字段名。）

其次，对于我的事件序列化程序，我使用了错误的基类

class EventSerializer(serializers.HyperlinkedModelSerializer)

改为

Tact/tact_api/lines/test_views.py", line 103, in 
test_api_can_create_an_event
self.assertEqual(self.response.status_code, status.HTTP_201_CREATED)
AssertionError: 400 != 201

----------------------------------------------------------------------
Ran 8 tests in 0.105s

class EventSerializer(serializers.HyperlinkedModelSerializer):
"""
Convert Event model instance into native Python datatypes to be rendered as JSON.
"""
owner = serializers.ReadOnlyField(source='owner.username')

class Meta:
    model = Event
    fields = ('url', 'id', 'owner', 'created', 'modified', 'title', 'desc', 'start',
              'end', 'line')

def get_fields(self, *args, **kwargs):
    """
    create and return a new Event object (linked to a user owned Line) with validated data.

    update and return an existing Event object with validated data.
    """
    fields = super(EventSerializer, self).get_fields(*args, **kwargs)
    view = self.context['view']
    owner = view.request.user
    fields['line'].queryset = fields['line'].queryset.filter(owner=owner)
    return fields

class EventSerializer(serializers.ModelSerializer) 

---

我认为更多有价值的信息将是配置和urlconf，请将此添加到问题中，或者提供一些外部小提琴的链接。@Take_Care_uu-谢谢。您可以在[link]（）查看url配置文件，[link]（）查看应用程序url文件，[link]（）查看基本配置文件。如果您喜欢将此信息粘贴到问题中，请告诉我。@Take_Care_u-我终于解决了此问题。结果表明，我的测试模块中有一个轻微的语法错误。我将self.event_data={'pk'：line.id..}更改为{'line'：line.id..}。此外，在序列化程序模块中，我将类EventSerializer（serializers.HyperlinkedModelSerializer）：更改为类EventSerializer（serializers.ModelSerializer）：。通过这些更改，我的测试现在可以运行了！