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by janko-m 3976 days ago
Yes, multiple databases are really useful for me, for some reason I often need to transfer data from one to another, e.g. legacy database to a new improved one (which I think happens often if you're in a non-startup).

In ActiveRecord you would have to specify for each model to which the database to connect. And then you have to figure out how to call a User model in one database, and how in the other (you have to call them differently, even if table names are the same). I think it can get pretty chaotic with something bigger.