from django.db import models

# Create your models here.
class Publisher(models.Model):
    id = models.AutoField(primary_key=True)
    name = models.CharField(max_length=32)

class Book(models.Model):
    id = models.AutoField(primary_key=True)
    name = models.CharField(max_length=32)

    publisher = models.ForeignKey('Publisher', related_name='person_book', related_query_name='ooxx')

# Book表
id   title  pubtime          person_id

1    书1    1533225600000    1

2    书2    1533225600000    1

3    书3    1534435200000    1

4    书4    1535644800000    2

5    书5    1535126400000    3

# Publisher表
id   name

1    出版社1

2    出版社2

3    出版社3

book_obj = models.Book.objects.all()  # 取到书籍对象
book_obj.publisher.name   # 书籍的出版社名字，html
book_obj.person.id   # 书籍的出版社id，html

models.Book.objects.filter(id=1).values('publisher__name')  # 查询id是1的书的出版社的名字，一条双下划线就是跨一张表
models.Book.objects.filter(id=1).values_list('publisher__name')  

publisher_obj = models.Publisher.objects.first()  # 找到第一个出版社对象

ret = publisher_obj.book_set.all()  # 找到第一个出版社出版的所有数

for i in ret:  # 循环对象

    print(i.name)  # 打印出每一个书的书名

publisher_obj = models.Publisher.objects.first()  # 找到第一个出版社对象

books = publisher_obj.book_set.all()  # 找到第一个出版社出版的所有书

titles = books.values_list("name")  # 找到第一个出版社出版的所有书的书名
print(titles)
因为使用了releted_name,就是用person_book代替了表字段名字
表字段person = models.ForeignKey(Person, related_name='person_book')
所以这一这样写
books = publisher_obj.person_book.all()
titles = books.values_list('name')
print(titles)
如果表字段person = models.ForeignKey(Person, related_name='person_book'，related_query_name="xxoo")
related_query_name="xxoo"，这里表示跨表查询xxoo代替表的名字book
books = publisher_obj.ooxx_set.all()

ret = models.Publisher.objects.filter(id=1).values_list('person_book__name')
person_book是通过releted_name给对应关系起的名字，通过person_book就找到了关联的表，再通过双下划线找到name
print(ret)

import os

if __name__ == '__main__':

    # 加载Django项目的配置信息

    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "项目名.settings")

    # 导入Django，并启动Django项目

    import django

    django.setup()

    from app01 import models

    # 查询id为1的出版社出版的所有书的name

    ret = models.Publisher.objects.filter(id=1).values_list('person_book__name')

    print(ret)