Django REST Framework generics.RetrieveUpdateDestroyAPIView return 所有记录而不是一个

Question

我是 DRF 的新手，正在尝试构建休息 API，我已将我的模型、URL、视图和序列化程序设置为：

model.py:

services = (
    ('Single', 'Single'),
    ('Multiple', 'Multiple'),
)


class DeploymentOnUserModel(models.Model):
    deployment_name = models.CharField(max_length=256, )
    credentials = models.TextField(blank=False)
    project_name = models.CharField(max_length=150, blank=False)
    project_id = models.CharField(max_length=150, blank=True)
    cluster_name = models.CharField(max_length=256, blank=False)
    zone_region = models.CharField(max_length=150, blank=False)
    services = models.CharField(max_length=150, choices=services)
    configuration = models.TextField()
    routing = models.TextField()

    def save(self, **kwargs):
        if not self.id and self.services == 'Multiple' and not self.routing and not self.configuration:
            raise ValidationError("You must have to provide routing for multiple services deployment.")
        super().save(**kwargs)

From urls.py:

from django.urls import path, include
# from .routers import router
from . import apiview

app_name = 'deployments'

urlpatterns = [
    # path('', include(router.urls), name='deployments'),
    path('deployments/', apiview.DeploymentsList.as_view(), name='deployment-list'),
    path('deployments/<int:pk>/', apiview.DeploymentDetail.as_view(), name='deployment_detail')

]

From apiview.py:

class DeploymentDetail(generics.RetrieveUpdateDestroyAPIView):

    def retrieve(self, request, *args, **kwargs):
        pk = self.kwargs.get('pk')

        return Response(DeploymentOnUserModel.objects.get(pk=kwargs['pk']))

From serializers.py:

class DeploymentOnUserSerializer(serializers.ModelSerializer):
    class Meta:
        model = DeploymentOnUserModel
        fields = '__all__'

当我尝试访问时：http://127.0.0.1:8000/api/v1/deployments/?pk=1/ 它应该 return id=1 的单个对象，但它 return 是所有对象。

Answer 1

与其将 pk 作为 GET 参数传递，不如将其作为 url 的一部分传递，如下所示：

http://127.0.0.1:8000/api/v1/deployments/1/

URL 您正在尝试使用 DeploymentsList 执行的 http://127.0.0.1:8000/api/v1/deployments/?pk=1/ 因为它不包含 pk url kwarg.

您还应该在 return 之前序列化对象作为响应：

class DeploymentDetail(generics.RetrieveUpdateDestroyAPIView):

    def retrieve(self, request, *args, **kwargs):
        pk = self.kwargs.get('pk')
        object = DeploymentOnUserModel.objects.get(pk=kwargs['pk'])
        serializer = DeploymentOnUserSerializer(object)
        return Response(serializer.data)

Answer 2

When I try get method instead of retrieve the url error has gone but it return another error as: Object of type 'DeploymentOnUserModel' is not JSON serializable

我知道已经晚了但是在你的apiview.py

class DeploymentDetail(generics.RetrieveUpdateDestroyAPIView):
    serializer_class = DeploymentOnUserSerializer()   

    
   def get_queryset(self):
      pk = self.request.GET.get("pk")
      return deployment = DeploymentOnUserModel.objects.get(pk=pk)

Django REST Framework generics.RetrieveUpdateDestroyAPIView return 所有记录而不是一个

Django REST Framework generics.RetrieveUpdateDestroyAPIView return all records instead of one

python

django

python-3.x

django-rest-framework

drf-nested-routers