django官网网址：https://www.djangoproject.com/start/overview/
https://docs.djangoproject.com/en/dev/ref/models/querysets/#django.db.models.query.QuerySet.select_related
中文文档：http://shouce.jb51.net/django-chinese-docs-18/1_1.html
elasticsearch文档：https://www.elastic.co/guide/en/elasticsearch/reference/6.0/getting-started.html
网址：https://blog.csdn.net/weixin_42134789/article/details/80276855?utm_medium=distribute.pc_relevant.none-task-blog-OPENSEARCH-1.nonecase&depth_1-utm_source=distribute.pc_relevant.none-task-blog-OPENSEARCH-1.nonecase
