Thursday, January 01, 2009

Avoiding the undefined method `use_transactional_fixtures=' error.

After adding rspec to my project and generating a model with rspec_model, I tried to run the generated spec test: 
$ spec -cfprofile spec/
.../toshi/spec/spec_helper.rb:12: undefined method `use_transactional_fixtures=' for # (NoMethodError)
 from /usr/lib/ruby/gems/1.8/gems/rspec-1.1.11/lib/spec/runner.rb:184:in `configure'
 from /home/medined/Workspaces/toshi/spec/spec_helper.rb:8
 from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
 from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
 from /home/medined/Workspaces/toshi/spec/models/book_spec.rb:1
After a fruitless internet search, I tried using a rake task: 
$ rake spec
.
Finished in 0.061996 seconds
1 example, 0 failures
Posted by David Medinets at 1/01/2009 01:34:00 AM
Labels:

3 comments:

flee61255 said...

I ran into the same initial problem but unhappily, 'rake spec' gave the same very same error. I installed rspec and rspec-rails as gems in WinXP, doing a 'gem install rspec' followed by 'gem install rspec-rails'. This loaded version 1.1.12 for both gems, but apparently the order of gem installation is critical; running 'ruby script/generate rspec' results in the wrong file spec/spec_helper.rb being installed; it's the one found in the rspec gem directory, rather than the one from the rspec-rails gem directory. I unistalled both gems, then did a 'gem install rspec-rails', allowing the installer to automatically install the rspec gem as part of the process. Once this completed, I created a new project, ran 'ruby script/generate rspec', and verified that the correct spec/spec_helper.rb file was now present in my project directory. Both the spec and rake commands now work without errors.

8:11 PM
Jason FB said...

this happens when you generate your rails app before 2.3 and then upgrade to a Rails version > 2.3.

The fix is to go to test/test_helper.rb and change:
class Test::Unit::testCase

to:
class ActiveSupport::TestCase

http://www.datatravels.com/technotes/2009/04/21/rails-error-undefined-method-use_transactional_fix/

2:24 PM
Thomas said...

@Jason FB Thanks a lot. This was precisely the problem!

4:50 PM

Post a Comment

Subscribe to: Post Comments (Atom)