Django cross domain problems, addition, deletion, modification and query of association table

【 Cross domain problem reference address https://blog.csdn.net/zbx2010/article/details/107481686】
【 Add, delete, change and check the reference address of the association table , I have time to tidy up in the back 】
【celery】https://www.cnblogs.com/ryxiong-blog/p/11645700.html