My biggest gripe about Rails are the model validations and DB adapters. As someone coming from Django, I hate that I have to explicitly define db related valid

My biggest gripe about Rails are the model validations and DB adapters. As someone coming from Django, I hate that I have to explicitly define db related validations and catch exceptions thrown by postgres instead of it just being handled by AR with the DB adapter based on the database constraints. I love how Django handles that and I hope this finds its way into Rails one day.