search for: releoad

Hi, I''m curious how folks handle situations where you want to backup existing data in a table before performing migrations. Say, for example, you have a column type change, and you want to preserve the current data and later releoad that data in case something goes wrong. Do folks manually do a Model.find(:all) and dump it to a file in, say, yaml format in the self.up method before any schema changes occur and then reload it in the self.down method? Perhaps as a pseudo-fixture? Or do people use temporary tables? What'...