Can't AutoMigrate() tables with uniqueIndex since v1.25.6 on MySQL

[ov]

GORM Playground Link

go-gorm/playground#717

Description

Starting with gorm 1.25.6 I can't automatically migrate tables with uniqueIndex constraint. Here's a very simple example with just one model and one field with the constraint. I removed DROP TABLE commands, so the database keeps the data between the test runs.

Now if you run the test the first time - it passes, if you run it again - you get the error:

Failed to auto migrate, but got error Error 1091 (42000): Can't DROP 'uni_entities_name'; check that column/key exists

This is tested with 1.25.9 and fails there. Works fine in 1.25.5, started failing in 1.25.6.

Tested with MySQL and fails there. Seems working OK with sqlite3 though...

[ov]

I updated the test so it doesn't need to be run twice. I now call RunMigration() twice and it fails straight away.

[ov]

My bad. After checking the CI logs from the pull request it looks like it works just fine on your side. I tested it further and it seems like upgrading gorm mysql driver 1.5.2->1.5.6 did the job.

Please ignore the issue. Thank you.