标签:print fir model module settings def 信息 default 关联
用一个django外键关联的正反向查询做例子
import os
if __name__ == '__main__':
#加载Django项目的配置信息
os.environ.setdefault("DJANGO_SETTINGS_MODULE","dispy.settings.stg")
#导入Django,并启动Django项目
import django
django.setup()
from ormtest import models
#正向查询(查找书的类型对象,然后通过外键关联,在出版社列中查出那家出版社)
book_obj = models.Book.objects.first()
book_obj_publisher = book_obj.publisher.name
print("书名:",book_obj,"出版社为:",book_obj_publisher)
#反向查询
publisher_obj = models.Publisher.objects.first()
print(publisher_obj)
publisher_obj_book = publisher_obj.books.all()
#books为book类中定义的related_name
print(publisher_obj_book)
在main函数中使用django模型(附django正反向的外键关联查询)
标签:print fir model module settings def 信息 default 关联
原文地址:https://www.cnblogs.com/hupingzhi/p/12430835.html