Moving bike model to the bikes table

Leaving the bike_models table and bikes.bike_model_id column as a backup.

db/migrate/20130902201853_add_model_to_bike.rb

@@ -0,0 +1,10 @@
+class AddModelToBike < ActiveRecord::Migration
+  def change
+    add_column :bikes, :model, :string
+    change_column :bikes, :bike_model_id, :integer, :null => true
+    Bike.all.each do |bike|
+      bike.model = BikeModel.find_by_id(bike.bike_model_id).model
+      bike.save
+    end
+  end
+end