Getting new Migrations generated after 3.1 upgrade

Question

I have upgraded my app to rails 3.1 following Ryan Bates' instructions in Railscast Episode 282. Everything is working wonderfully except that new migrations generated are still following the old style of

class MigrationName < ActiveRecord::Migration def up end def down end end

How do I upgrade things so new migrations are generated in the new style of:

class MigrationName < ActiveRecord::Migration def change end end

what does rails -v say? My guess is that you updated the Gemfile but not the gem that's installed on your system. — Benoit Garret
– Benoit Garret, Commented Sep 26, 2011 at 14:01

Benoit Garret · Accepted Answer · 2011-09-26 14:17:13Z

The 3.1.0 generator only uses change if it detects a migration that adds something. Maybe you didn't call rails g migration AddSomething?

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