[Django]-Have a problem using Django 2.2 with PyMySQL

Firstly, note that Django does not officially support PyMySQL.

For PyMySQL to work with Django 2.2, it will have to update the version_info from 1.3.12 to 1.3.13. Other changes might be required at the same time.

You can see a similar pull request 623 when the version was bumped to support Django 2.0.

You could try changing the value in PyMySQL yourself, and see if you encounter any issues with your app. You could also try running the test suite mentioned on the pull request.

The PyMySQL maintainer is a volunteer, so the more help they receive testing the changes, the more likely it is that the package will be updated sooner.

If you need a pure-python driver, another option would be to try MySQL Connector/Python. However, this has not always supported the latest Django versions immediately, so it might not work with Django 2.2 yet.

Perhaps django-cymysql is available agianst Google App Engine Standard.
https://gist.github.com/nakagami/2c261b306a50e9ecd84734c0e74e2011#mysql

pip install django==2.2 “django-cymysql>=2.2,<2.3” cymysql

and use mysql_cymysql ENGINE