drf 多表

https://www.django-rest-framework.org/  官方站

https://www.django-rest-framework.org/tutorial/quickstart/#serializers    -- 序列化

一个 例子

from django.conf.urls import url
from django.contrib import admin
from app01 import views

urlpatterns = [
    url(r'^admin/', admin.site.urls),
    url(r'books/(\d+)/', views.BookHandle.as_view()),
    url(r'books/', views.BookHandle.as_view()),
]

class BookHandle(APIView):
    # 获取所有书籍
    def get(self, request,id=None):
        if id:
            books_obj_list = models.Book.objects.filter(id=id)
        else:
            books_obj_list = models.Book.objects.all()

        book_se = BookSerializer(books_obj_list, many=True)  # 要点
        return Response(book_se.data)

查询全部和带参数的查询 -- 

from django.shortcuts import render
from app01 import models
from rest_framework.views import APIView
from rest_framework import serializers
from rest_framework.response import Response   # 响应

class BookSerializer(serializers.ModelSerializer):
    class Meta:
        model = models.Book
        fields = '__all__'  # exclude = ('user',) 排除某些字段的方法    fields=['','']列表
　　　　
    
class BookHandle(APIView):
    # 获取所有书籍
    def get(self, request,id=None):
        if id:
            books_obj_list = models.Book.objects.filter(nid=id)
        else:
            books_obj_list = models.Book.objects.all()

        book_se = BookSerializer(books_obj_list, many=True)  # 要点
        return Response(book_se.data)

    def post(self, request):
        cs = BookSerializer(data=request.data,many=False)
        if cs.is_valid():
            cs.save()  # create 新建
            return Response(cs.data)
        else:
            return Response(cs.errors)

class SBookHandle(APIView):
    # 更新数据
    def put(self,request,id):
        old_obj = models.Book.objects.filter(pk=id).first()  # querySet
        cs = BookSerializer(data=request.data,many=False,instance=old_obj)
        if cs.is_valid():
            cs.save()   # 更新 update
            return Response(cs.data)
        else:
            return Response(cs.errors)

    def delete(self,request,id):
        models.Book.objects.filter(pk=id).delete()  # 删除
        return Response('')

    def get(self,request,id):
        books_obj_list = models.Book.objects.get(pk=id)  # model 类型
        book_se = BookSerializer(books_obj_list,many=False)
        return Response(book_se.data)

from django.conf.urls import url
from django.contrib import admin
from app01 import views

urlpatterns = [
    url(r'^admin/', admin.site.urls),

    url(r'books/$', views.BookHandle.as_view()),  # 不带参数的

    url(r'books/(\d+)/', views.SBookHandle.as_view()), # 带参数的
]