ORM多表操作之一对多查询之下划线查询
Book.objects.filter(publish__name=" ").values()
正向查询用外键，反向查询用类名
Publish.objects.filter(book__name="python").values()
Book.objects.filter(name="python").values("publish__name")
Book.objects.filter(publish__name=" ").values()
正向查询用外键，反向查询用类名
Publish.objects.filter(book__name="python").values()
Book.objects.filter(name="python").values("publish__name")