Rails: Is it bad to have an irreversible migration?

Question

When is it acceptable to raise an ActiveRecord::IrreversibleMigration exception in the self.down method of a migration? When should you take the effort to actually implemen

Answer 1

I think another situation when it's ok is when you have a consolidated migration. In that case a "down" doesn't really make sense, as it would drop all the tables (except tables added after the consolidation). That's probably not what you'd want.