REST Django - 创建后立即使用 objectID

Question

我有一个项目模型，我可以通过 POST 方法从中创建实例。我创建了一个名为 UserProject 的新模型，其中包含一个 userID 和一个 projectID。 现在我想在每次使用该 POST 视图创建项目时添加一个 UserProject 对象。

正在创建项目，但 UserProject 数据库一直为空，我缺少什么？

models.py：

from django.db import models
from django.contrib.auth.models import User

# Create your models here.
class Project(models.Model):
    id = models.AutoField(db_column = 'db_ID', primary_key = True)
    name = models.CharField(max_length=500, default = None)
    descriptor = models.CharField(max_length = 1000, null = True)
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

    class Meta:
        db_table = 'projects'

    def __str__(self):
        return self.name




class Userproject(models.Model):
    id = models.AutoField(db_column = 'db_ID', primary_key = True)
    user = models.ManyToManyField(User)
    project = models.ManyToManyField('Project')
    created_at = models.DateTimeField(auto_now_add=True, null=True)
    updated_at = models.DateTimeField(auto_now=True, null = True)

    class Meta:
        db_table = 'UserProjects'
    def __str__(self):
        return self.id

views.py：

class ProjectView(
    APIView,
):
    def post(self, request):
        serializer = ProjectSerializer(data = request.data)
        if serializer.is_valid():
            serializer.save()
            id = serializer.id
            user = request.user
            n = Userproject.objects.create(user = user, project = id)
            n.save()
            return Response({"status": "success", "data": serializer.data}, status = 200)
        else:
            return Response({"status": "error", "data": serializer.errors}, status = 400)

serializers.py:

  GNU nano 4.8                                                                serializers.py                                                                           from rest_framework import serializers

from .models import Project

class ProjectSerializer(serializers.ModelSerializer):
    name = serializers.CharField(max_length = 500, required = True)
    descriptor = serializers.CharField(max_length = 1000,  default = None)

    class Meta:
        model = Project
        fields = '__all__'

Answer 1

应该是：

     ...
        project = serializer.save()
        user = request.user
        n = Userproject.objects.create(user = user, project = project.id)
     ...