gorm Automatic database reconnect

Describe the feature

GORM should try to reconnect to a database when connection is lost (e.g. Network error, DB restart)

After the DB restarts, the gorm application usually isnt able to recover and get back to normal operations. That should be solved.

To reproduce the behaviour that I want to avoid - working with Postgres, I get:

start your DB
run you gorm app
use your gorm app
shutdown DB
try using gorm app
see it failing with db connection error: "FATAL: terminating connection due to administrator command (SQLSTATE 57P01)"
restart DB
Try using App
See it still getting the same error

Expecation would be that the application reconnects to the DB and continue to work without a restart.

Motivation

GORM applications without DB connection do not work very well.

Related Issues

Multiple issues have been created with that, but all have been closed, but without mentioning a reason or a workaround:

https://github.com/go-gorm/gorm/issues?q=reconnect

There are also some chat messages about it: https://gitter.im/jinzhu/gorm?at=5a59df94ba39a53f1a0e36f2 - but it's not clear to me why gorm doesn't come out of the box with that reconnect behaviour - are there important downsides to configure it by default to reconnect automatically?

I'd be happy to try find a solution for that thing or add some documentation with a workaround if I get some guidance for more experienced gorm developers about how to do it best... maybe there is a reason why it has not been implemented before, or maybe I am overseeing something that makes it not a useful feature.

Aug 12 '22 16:08 henning

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