这里使用 Django Shell 来测试

python manage.py shell

单条记录序列化

from categories.models import Category
from categories.serializers import CategorySerializer

category = Category.objects.get(id=1)
serializer = CategorySerializer(category)
serializer.data

多条记录序列化

categories = Category.objects.all()
serializer = CategorySerializer(categories, many=True)
serializer.data

关联表的序列化

courses 中，定义 models.py

from django.db import models
from ca...