POST 请求方法在 Django Rest Framework 中不起作用

Question

每当我尝试发布请求时，都会出现以下错误：

/api/ 处的类型错误

禁止直接赋值给多对多集合的前端。 请改用 project_team.set() 。

请求方式：POST 请求URL：http: //127.0.0.1 :8000/api/ Django版本：2.0 异常类型：TypeError 异常值：

禁止直接赋值给多对多集合的前端。 请改用 project_team.set() 。

异常位置：C:\Users\Siddhesh\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\models\fields\related_descriptors.py in set ，第 509 行 Python 可执行文件：C:\Users\ Siddhesh\AppData\Local\Programs\Python\Python36\python.exe Python 版本：3.6.3 Python 路径：

['C:\Users\Siddhesh\Desktop\TechForSocial\backend', 'C:\Users\Siddhesh\AppData\Local\Programs\Python\Python36\python36.zip', 'C:\Users\Siddhesh\AppData\Local \Programs\Python\Python36\DLLs', 'C:\Users\Siddhesh\AppData\Local\Programs\Python\Python36\lib', 'C:\Users\Siddhesh\AppData\Local\Programs\Python\Python36', 'C:\Users\Siddhesh\AppData\Local\Programs\Python\Python36\lib\site-packages', 'C:\Users\Siddhesh\AppData\Local\Programs\Python\Python36\lib\site-packages\pytz -2018.5-py3.6.egg']

服务器时间：2018年12月17日星期一17:57:57

models.py ：

class DummyPeopleModel(models.Model):

     person_name = models.CharField(max_length=45)

     def __str__(self):

          return self.person_name


class ActiveProject(models.Model):

     project_name = models.CharField(max_length=30)
     project_abstract = models.CharField(max_length=1000)
     project_paper = models.CharField(max_length=1000)
     project_team = models.ManyToManyField(DummyPeopleModel, help_text='Team that works on this Project' )
     project_join_us = models.CharField(max_length=1000)

     def __str__(self):
         return self.project_name

serializers.py ：

from rest_framework import serializers
from .models import ActiveProject


class ActiveProjectSerializer(serializers.ModelSerializer):

     class Meta:

        model = ActiveProject
        fields = ('id', 'project_name', 'project_abstract', 'project_paper', 'project_team', 'project_join_us',)

     def create(self, validated_data):
        return ActiveProject.objects.create(**validated_data)

views.py ：

class ProjectList(generics.ListAPIView):
     queryset = ActiveProject.objects.all()
     serializer_class = ActiveProjectSerializer

     def post(self, request):

         serializer = ActiveProjectSerializer(data=request.data)
         if serializer.is_valid():
             serializer.save()
             return Response(serializer.data, status=status.HTTP_201_CREATED)
         return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)


class ProjectDetail(generics.RetrieveUpdateDestroyAPIView):
     queryset = ActiveProject.objects.all()
     serializer_class = ActiveProjectSerializer

Answer 1

根据文档，在序列化程序中将project_team指定为PrimaryKeyRelatedField(many=True)可能会有所帮助（不过不要将其设置为read_only ）