Django:如何给一个项目分配多个类别

from django.db import models

class Category(models.Model):
    name = models.CharField(max_length=100)
    description = models.TextField()

    def __str__(self):
        return self.name

from django.db import models

class Project(models.Model):
    name = models.CharField(max_length=100)
    description = models.TextField()
    categories = models.ManyToManyField(Category)

    def __str__(self):
        return self.name

python manage.py makemigrations
python manage.py migrate

# 创建一个新项目
project = Project.objects.create(name='项目名称', description='项目描述')

# 获取一个或多个类别
category1 = Category.objects.get(name='类别1')
category2 = Category.objects.get(name='类别2')

# 将类别分配给项目
project.categories.add(category1, category2)