Geoff Evason

Here is a summary of a few of the problems I encountered while trying to upgrade an app from rails 2.1 to rails 2.2.2

Getting my dev code to run

First, to update the rails code:

 > rake rails:freeze:gems

The first time I tried to run the app I got this error:

vendor/rails/activesupport/lib/active_support/dependencies.rb:445:in `load_missing_constant': uninitialized constant Inflector (NameError)

ActiveSupport::Inflector.inflections do |inflect|
  ...
end

In my case, I was also using the ActiveMerchant plugin which needed updating for the same reason

script/plugin install git://github.com/Shopify/active_merchant.git --force

According to gusg.us, HAML needs to be at 2.0.4.   I didn’t see any problems in my testing but I didn’t want to try my luck so I updated HAML too.

sudo gem update haml

update my environment.rb gem requirement

config.gem "haml", :version => "2.0.6"

rake gems:unpack:dependencies

Production

While deploying to a staging server I got this error:

initializer.rb:514:in `send': undefined method `cache_template_loading=' for ActionView::Base:Class (NoMethodError)

As described here, to fix this, just update your APP/config/environments/production.rb (and staging.rb) file by removing the following:

config.action_view.cache_template_loading

Overall, it wasn’t too painful an upgrade…

I didn’t run rake rails:update. That may have fixed some of these things on it’s own, but my understanding was that that wasn’t needed anymore…