class RemoveRenderedNotes < ActiveRecord::Migration[5.2] def self.up remove_column :todos, 'rendered_notes' end def self.down add_column :todos, 'rendered_notes', :text # Call save on each todo to force generation of rendered_notes # Copied from 20120412072508_add_rendered_notes say "Rendering todo notes..." Todo.all.each{ |todo| todo.save(validate: false) } say "Finished rendering todo notes." end end