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，htmlbook_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bookbooks = 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nameprint(ret)

import osif __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 djangodjango.setup()from app01 import models# 查询id为1的出版社出版的所有书的nameret = models.Publisher.objects.filter(id=1).values_list('person_book__name')print(ret)