Upgrade to Rails 2.1.0_RC1

May 22nd, 2008 cpetersen

upgrade (with 2 Ds)

I've detailed the steps I took to get our app up and running, this isn't an exhaustive list by any means, but I hope it helps.

Download Rails 2.1.0_RC1

Rail is on GitHub now, which is a great move. Unfortunately, our app is still under subversion and piston doesn't yet support Git, so I downloaded RC1 from http://github.com/rails/rails/commits/v2.1.0_RC1

Since I can't manage it with Piston anymore, I completely removed rails from my vendor directory and replaced it with the downloaded version.

Now its time to run

  rake spec
  

ActionView::Base to ActionView::Template

At this point I can't even run rake, I just get the following error:

 
  ERROR
  > rake spec
  (in /Users/cpetersen/project)
  rake aborted!
  undefined method `register_template_handler' for ActionView::Base:Class

  (See full trace by running task with --trace)

It turns out we are registering a template handler for PDFs in our environment. Looks like they moved that functionality out of ActionView::Base into ActionView::Template, to fix all we needed to do is change the following line your config/environment.rb:

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    ActionView::Base.register_template_handler 'pdf', ActionView::PDFRender
  

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    ActionView::Template.register_template_handler 'pdf', ActionView::PDFRender
  

will_paginate

We use the wonderful will_paginate plugin to handle pagination in our app. However, when I run my specs, I now get the following:

  ERROR
  705)
  ActionView::TemplateError in 'CatalogController bin should show a compound'
  stack level too deep
  In catalog/compound.html.erb


      vendor/plugins/will_paginate/lib/will_paginate/finder.rb:138:in `method_missing_without_paginate'
      vendor/plugins/will_paginate/lib/will_paginate/finder.rb:139:in `method_missing'
      app/models/ware.rb:67:in `suggested_bins'
      spec/models/bin_spec.rb:32

It turns out, we weren't on the latest release. You can get the latest release here. Once again, its from the hub. The same process I used for installing Rails from github applies here.

acts_as_versioned

Not bad, the tests run, and only about 3% are failing. What next?

Almost all of the remaining errors look like this one:

  ERROR
  30)
  NoMethodError in '/survey_templates/edit should render survey template edit page'
  You have a nil object when you didn't expect it!
  You might have expected an instance of Array.
  The error occurred while evaluating nil.include?
  ./spec/views/survey_templates/edit.html.erb_spec.rb:6:in `new'
  ./spec/views/survey_templates/edit.html.erb_spec.rb:6:

We are using the acts_as_versioned plugin for versioning a lot of our content.

It turns out the core team has done a lot of work on "dirty" objects for this release. Ryan Daigle does a good job explaining it. It turns out this functionality breaks acts_as_versioned.

Luckily for us, codafoo is able to help. He forked acts_as_versioned and made it work with RC1 and dirty objects. You can get his version here. Since I had frozen acts_as_versioned into my vendor/gems directory, I just had to replace it with codafoo's version. Your milage may vary.

You'll notice, its GitHub once again. Note to self, switch to git.

Proper has_one Validation

Now we are getting down to some nitty gritty errors. It turns out my last two errors were only working before by accident.

Prior to RC1, has_one relationships weren't being validated properly on save. I apparently had my fixtures in an inconsistent state, causing my test to fail. My fault, RC1 helped me find a problem with my fixtures. Here is the ticket. I fixed my fixtures, and on to the next/last.

Minor ActiveRecord::Base.find Change

Finally, there was a change to ActiveRecord::Base.find. I have a has_many :through relationship and I am doing a non-trivial find. I was including the table order_states and referencing its order_status_id column in my conditions. However, I wasn't including the table name in my conditions. Here's the code:

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    @orders = Order.find(:all, :conditions => "order_status_id > 1", :include => "order_states", :order => "orders.created_at   DESC")
  

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    @orders = Order.find(:all, :conditions => "order_states.order_status_id > 1", :include => "order_states", :order => "orders.created_at DESC")
  

Thanks to Rob and Ryan for helping my through this process.

See you at RailsConf!

Update - attachment_fu

After I wrote this post, I realized that attachment_fu had stopped working (yet all the tests passed, troublesome). When I tried to upload something, I received the following stack trace:

The solution for us was just to update attachment_fu to trunk. Voila, everything started working again.

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