Rails 3 migrations: Adding reference column?

Question

If I create a new rails 3 migration with (for example)

rails g migration tester title:tester user:references

, everything works fine...howe

Answer 1

You can use references in a change migration. This is valid Rails 3.2.13 code:

class AddUserToTester < ActiveRecord::Migration
  def change
    change_table :testers do |t|
      t.references :user, index: true 
    end
  end
  def down
    change_table :testers do |t|
      t.remove :user_id
    end
  end
end

c.f.: http://apidock.com/rails/ActiveRecord/ConnectionAdapters/SchemaStatements/change_table