UNIQUE_REG_ID setting doesn't work with MySQL

[xzander]

If I set UNIQUE_REG_ID to True and then run migration 0007_uniquesetting.py, I get an error MySQLdb._exceptions.OperationalError: (1170, "BLOB/TEXT column 'registration_id' used in key specification without a key length"). Django won't fix it according to https://code.djangoproject.com/ticket/2495. And there is a note about the issue in docs https://docs.djangoproject.com/en/2.2/ref/databases/#textfield-limitations

registration_id is TextField in GCMDevice, WNSDevice and WebPushDevice

[jlbeltran]

Any clue about this?

[jamaalscarlett]

Given that this is a known Django issue, I'm not sure what we can do other than update the docs to detail this issue in the docs.