使用Django的监护人djangorestframework权限不工作

Question

我想用Django的监护人对象级别的权限添加到我的Django的REST的项目，但我正在逐渐

http://127.0.0.1:8000/api/v1/tasks/

禁止HTTP 403允许：GET，POST，HEAD，OPTIONS内容类型：应用程序/ JSON各不相同：接受

{“细节”：“您没有权限执行此操作。” }

用户joe已登录。

settings.朋友:

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'django.contrib.sites',

    'guardian',
    'rest_framework',
    'rest_framework.authtoken',
    'rest_auth',

    'task.apps.TaskConfig',
]

models.朋友:

class Task(models.Model):
    summary = models.CharField(max_length=32)
    content = models.TextField()
    reported_by = models.ForeignKey(User, on_delete=models.CASCADE)
    created_at = models.DateTimeField(auto_now_add=True)

    class Meta:
        permissions = (
            ('view_task', 'View task'),
        )

serialize认识.朋友:

class TaskSerializer(serializers.ModelSerializer):
    class Meta:
        model = Task
        fields = '__all__'

permissions.朋友:

class CustomObjectPermissions(permissions.DjangoObjectPermissions):
    perms_map = {
        'GET': ['%(app_label)s.view_%(model_name)s'],
        'OPTIONS': ['%(app_label)s.view_%(model_name)s'],
        'HEAD': ['%(app_label)s.view_%(model_name)s'],
        'POST': ['%(app_label)s.add_%(model_name)s'],
        'PUT': ['%(app_label)s.change_%(model_name)s'],
        'PATCH': ['%(app_label)s.change_%(model_name)s'],
        'DELETE': ['%(app_label)s.delete_%(model_name)s'],
    }

filters.朋友:

class DjangoObjectPermissionsFilter(BaseFilterBackend):
    perm_format = '%(app_label)s.view_%(model_name)s'
    shortcut_kwargs = {
        'accept_global_perms': False,
    }

    def __init__(self):
        assert 'guardian' in settings.INSTALLED_APPS, (
            'Using DjangoObjectPermissionsFilter, '
            'but django-guardian is not installed.')

    def filter_queryset(self, request, queryset, view):
        from guardian.shortcuts import get_objects_for_user

        user = request.user
        permission = self.perm_format % {
            'app_label': queryset.model._meta.app_label,
            'model_name': queryset.model._meta.model_name,
        }

        return get_objects_for_user(
            user, permission, queryset,
            **self.shortcut_kwargs)

views.朋友:

class TaskViewSet(viewsets.ModelViewSet):
    queryset = Task.objects.all()
    serializer_class = TaskSerializer
    permission_classes = (CustomObjectPermissions,)
    filter_backends = (DjangoObjectPermissionsFilter,)

URLs.朋友:

router = DefaultRouter()

router.register('tasks', TaskViewSet, base_name='tasks')

urlpatterns = router.urls

但它在外壳罚款

> python manage.py shell -i ipython
In [1]: from django.contrib.auth.models import User

In [2]: joe = User.objects.all().filter(username="joe")[0]

In [3]: import task.models as task_models

In [4]: task = task_models.Task.objects.all()[0]

In [5]: joe.has_perm('view_task', task)
Out[5]: True

Answer 1

该API第一checks model-level permissions，然后object-level permissions它们是否适用。由于自定义权限类需要用户有只读权限，您需要确保乔已分配模型级读取权限。如果检查joe.has_perm('tasks.view_task')，我敢打赌，它返回False。为了解决这个问题，您可能需要直接分配他的用户的权限，或者他添加到已分配相应权限的组。

另外，还要注意的Django 2.1最近添加的"view"权限，它不应该是必要的，将其添加到您的模型了。