Question

我是DRF的新手，正在尝试构建rest API，我将模型，URL，视图和序列化器设置为：

model.py：

//a[contains(text(),'nnn jhjhjk')]/parent::*/preceding-sibling::*/child::*

来自urls.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)

来自apiview.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')

]

来自serializers.py：

class DeploymentDetail(generics.RetrieveUpdateDestroyAPIView):

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

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

当我尝试访问：http://127.0.0.1:8000/api/v1/deployments/?pk=1/时，它应该返回单个对象 id = 1 ，但它返回所有对象。

Answer 1

应该将pk作为GET参数的一部分传递给pk，而不是像这样：

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

您正尝试使用由http://127.0.0.1:8000/api/v1/deployments/?pk=1/执行的DeploymentsList的URL，因为它不包含pk url kwarg。

此外，您还应该序列化对象，然后将其作为响应返回：

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

当我尝试使用get方法而不是检索url错误时，但是它返回另一个错误为：类型为“ DeploymentOnUserModel”的对象为无法JSON可序列化

我知道已经很晚了，但是在您的apiview.py

中

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泛型.RetrieveUpdateDestroyAPIView返回所有记录而不是一个记录

2 个答案: