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TypeError:在/“module”对象处,Python rest_framework中不可调用

django-rest-framework

Tran Quoc Ung · 技术社区 · 1 年前

我有一个简单的django_restframework项目,但我在下面遇到了一个错误。我不知道它为什么会出现的根本原因。我在哪里做错了吗?

这是我的序列化程序 StorySerizer.py:

from .models import Category, Story
from rest_framework import serializers

class StorySerializer(serializers.HyperlinkedModelSerializer):
    category = serializers.CharField(source='category.id')
    class Meta:
        model = Story
        fields = ['category', 'name', 'author', 'url', 'content']

这是我的观点 视图.py

class StoryviewSet(viewsets.ModelViewSet):
    """
    API endpoint that allows users to be viewed stories (or edited)
    """

    queryset = models.Story.objects.all().order_by('-public_day')
    serializer_class = StorySerializer

    permission_classes = [permissions.IsAuthenticatedOrReadOnly]

和URL urls.py

...
from stories import views
from rest_framework import routers

router = routers.DefaultRouter()
router.register(r'stories', views.StoryviewSet)

urlpatterns = [
    ........
    path('api/', include(router.urls)),
    path('api-auth/', include('rest_framework.urls', namespace='rest_framework'))
]+static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)

设置.py

INSTALLED_APPS = [
    .....
    'rest_framework',
]

REST_FRAMEWORK = {
    'DEFAULT_PAGINATION_CLASS' : 'rest_framework.pagination.PageNumberPagination',
    'PAGE_SIZE' : 5,
    'DEFAULT_PERMISSION_CLASSES': [
        'rest_framework.permissions.DjangoModelPermissionsOrAnonReadOnly'
    ]
}

但是当我调用API时,我得到了一个错误错误

> Internal Server Error: /api/stories/ Traceback (most recent call
> last):   File
> "D:\Projects\Python\Module_3\MyNews\venv\lib\site-packages\django\core\handlers\exception.py",
> line 55, in inner
>     response = get_response(request)   File "D:\Projects\Python\Module_3\MyNews\venv\lib\site-packages\django\core\handlers\base.py",
> line 197, in _get_response
>     response = wrapped_callback(request, *callback_args, **callback_kwargs)   File "D:\Projects\Python\Module_3\MyNews\venv\lib\site-packages\django\views\decorators\csrf.py",
> line 56, in wrapper_view
>     return view_func(*args, **kwargs)   File "D:\Projects\Python\Module_3\MyNews\venv\lib\site-packages\rest_framework\viewsets.py",
> line 125, in view
>     return self.dispatch(request, *args, **kwargs)   File "D:\Projects\Python\Module_3\MyNews\venv\lib\site-packages\rest_framework\views.py",
> line 509, in dispatch
>     response = self.handle_exception(exc)   File "D:\Projects\Python\Module_3\MyNews\venv\lib\site-packages\rest_framework\views.py",
> line 469, in handle_exception
>     self.raise_uncaught_exception(exc)   File "D:\Projects\Python\Module_3\MyNews\venv\lib\site-packages\rest_framework\views.py",
> line 480, in raise_uncaught_exception
>     raise exc   File "D:\Projects\Python\Module_3\MyNews\venv\lib\site-packages\rest_framework\views.py",
> line 506, in dispatch
>     response = handler(request, *args, **kwargs)   File "D:\Projects\Python\Module_3\MyNews\venv\lib\site-packages\rest_framework\mixins.py",
> line 42, in list
>     serializer = self.get_serializer(page, many=True)   File "D:\Projects\Python\Module_3\MyNews\venv\lib\site-packages\rest_framework\generics.py",
> line 110, in get_serializer
>     return serializer_class(*args, **kwargs) TypeError: 'module' object is not callable [10/Dec/2023 08:31:51] "GET /api/stories/
> HTTP/1.1" 500 108765

请帮我修一下。。。。

谢谢提前

1 回复 | 直到 1 年前

Siddharth Sutar 1 年前

在里面 StorySerializer.py ,如果导入正确,则该字段 category = serializers.CharField(source='category.id') 如果类别是外键,则可能导致错误&类别是故事模型中的另一个模型。你可能想使用 PrimaryKeyRelatedField 而不是 serializers.CharField

class StorySerializer(serializers.HyperlinkedModelSerializer):
    category = serializers.PrimaryKeyRelatedField(queryset=Category.objects.all())
    
    class Meta:
        model = Story
        fields = ['category', 'name', 'author', 'url', 'content']

这将把类别外键表示为主键相关字段。若类别不是外键,那个么原始参数是正确的。

还要确保 StorySerializer 在顶部正确导入 views.py

from .StorySerializer import StorySerializer

这假设 StorySerializer 在名为StorySerializer.py的文件中定义,该文件与 视图.py 文件

应该就这些了!