Django 之 ORM表之间的外键关联与多对多

实现环境表结构：

models.py表单创建与代码

from django.db import models# Create your models here.class Publisher(models.Model):    id = models.AutoField(primary_key=True)    name = models.CharField(max_length=64,null=False,unique=True)    def __str__(self):        return "publisher_name:{}".format(self.name)class Book(models.Model):    id = models.AutoField(primary_key=True)    title = models.CharField(max_length=128,null=False)    publisher = models.ForeignKey(to=Publisher)           #外键关联    def __str__(self):        return "book_title:{}".format(self.title)class Author(models.Model):    id = models.AutoField(primary_key=True)    name = models.CharField(max_length=16,null=False)    book = models.ManyToManyField(to="Book")            #跟BOOK多对多关系    def __str__(self):        return "author_name:{}".format(self.name)