The problem you ran into was the same one as this thread:

http://groups.google.com/group/rubyonrails-talk/browse_thread/thread/e87b901813a541a5?hl=en

and both are caused by load_application_classes trying to load all
your models at startup. That routine does nothing when
config.cache_classes is false (the default in development mode).

However, I'm surprised that "require 'list'" *ever* worked. Even with
the Rails environment loaded, it gives me an error. The correct
require would be 'active_record/acts/list'.

On a somewhat related note, I've found that Rake tasks work a lot
better than standalone Ruby programs, and save a lot of headaches with
loading the environment...

--Matt Jones

On Apr 24, 12:26 am, Lee <[email protected]> wrote:
> I have solved this problem by extending the load path in
> environment.rb:
>
> config.load_paths += %W( #{RAILS_ROOT}/vendor/plugins/acts_as_list/lib/
> active_record/acts )
>
> rake gems RAILS_ENV=test is now able to resolve my "require 'list'"
> statements in my models.
>
> On 23 Apr, 17:16, Lee <[email protected]> wrote:
>
> > I've now discovered this problem is being caused by a require
> > statement in my models:
>
> > require 'list'
>
> > where 'list' is list.rb in the acts_as_list plugin.
>
> > I am unable to remove this as it is needed by a standalone Ruby
> > program that uses the same models as the Rails environment (and
> > ActiveRecord).
>
> > I still don't understand why 'rake gems' works in development but not
> > in test - that is, rake gems only complains about the "require 'list'"
> > statement when run in test. Any thoughts appreciated.
>
> > On 23 Apr, 16:21, Lee <[email protected]> wrote:
>
> > > I am unable to get 'rake gems' to run in my test environment. I am
> > > using the following command:
>
> > > rake gems RAILS_ENV=test
>
> > > and getting the error below. rake gems RAILS_ENV=development works ok.
>
> > > Any thoughts appreciated.
>
> > > Trace output:
>
> > > ** Invoke gems (first_time)
> > > ** Invoke gems:base (first_time)
> > > ** Execute gems:base
> > > ** Invoke environment (first_time)
> > > ** Execute environment
> > > rake aborted!
> > > no such file to load -- list
> > > /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in
> > > `gem_original_require'
> > > /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `require'
> > > /Library/Ruby/Gems/1.8/gems/activesupport-2.2.2/lib/active_support/
> > > dependencies.rb:155:in `require'
> > > /Users/leelon/work/cbox/app/models/filter.rb:10
> > > /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in
> > > `gem_original_require'
> > > /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `require'
> > > /Library/Ruby/Gems/1.8/gems/activesupport-2.2.2/lib/active_support/
> > > dependencies.rb:155:in `require'
> > > /Users/leelon/work/cbox/app/models/event_subscription.rb:6
> > > /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in
> > > `gem_original_require'
> > > /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `require'
> > > /Library/Ruby/Gems/1.8/gems/activesupport-2.2.2/lib/active_support/
> > > dependencies.rb:155:in `require'
> > > /Users/leelon/work/cbox/app/models/subscription.rb:8
> > > /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in
> > > `gem_original_require'
> > > /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `require'
> > > /Library/Ruby/Gems/1.8/gems/activesupport-2.2.2/lib/active_support/
> > > dependencies.rb:155:in `require'
> > > /Users/leelon/work/cbox/app/models/property.rb:7
> > > /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in
> > > `gem_original_require'
> > > /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `require'
> > > /Library/Ruby/Gems/1.8/gems/activesupport-2.2.2/lib/active_support/
> > > dependencies.rb:155:in `require'
> > > /Users/leelon/work/cbox/app/models/member_entity.rb:6
> > > /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in
> > > `gem_original_require'
> > > /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `require'
> > > /Library/Ruby/Gems/1.8/gems/activesupport-2.2.2/lib/active_support/
> > > dependencies.rb:155:in `require'
> > > /Users/leelon/work/cbox/app/models/accessibility.rb:6
> > > /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in
> > > `gem_original_require'
> > > /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `require'
> > > /Library/Ruby/Gems/1.8/gems/activesupport-2.2.2/lib/active_support/
> > > dependencies.rb:155:in `require'
> > > /Library/Ruby/Gems/1.8/gems/activesupport-2.2.2/lib/active_support/
> > > dependencies.rb:262:in `require_or_load'
> > > /Library/Ruby/Gems/1.8/gems/activesupport-2.2.2/lib/active_support/
> > > dependencies.rb:221:in `depend_on'
> > > /Library/Ruby/Gems/1.8/gems/activesupport-2.2.2/lib/active_support/
> > > dependencies.rb:133:in `require_dependency'
> > > /Library/Ruby/Gems/1.8/gems/rails-2.2.2/lib/initializer.rb:368:in
> > > `load_application_classes'
> > > /Library/Ruby/Gems/1.8/gems/rails-2.2.2/lib/initializer.rb:367:in
> > > `each'
> > > /Library/Ruby/Gems/1.8/gems/rails-2.2.2/lib/initializer.rb:367:in
> > > `load_application_classes'
> > > /Library/Ruby/Gems/1.8/gems/rails-2.2.2/lib/initializer.rb:365:in
> > > `each'
> > > /Library/Ruby/Gems/1.8/gems/rails-2.2.2/lib/initializer.rb:365:in
> > > `load_application_classes'
> > > /Library/Ruby/Gems/1.8/gems/rails-2.2.2/lib/initializer.rb:185:in
> > > `process'
> > > /Library/Ruby/Gems/1.8/gems/rails-2.2.2/lib/initializer.rb:112:in
> > > `send'
> > > /Library/Ruby/Gems/1.8/gems/rails-2.2.2/lib/initializer.rb:112:in
> > > `run'
> > > /Users/leelon/work/cbox/config/environment.rb:13
> > > /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in
> > > `gem_original_require'
> > > /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `require'
> > > /Library/Ruby/Gems/1.8/gems/activesupport-2.2.2/lib/active_support/
> > > dependencies.rb:153:in `require'
> > > /Library/Ruby/Gems/1.8/gems/activesupport-2.2.2/lib/active_support/
> > > dependencies.rb:521:in `new_constants_in'
> > > /Library/Ruby/Gems/1.8/gems/activesupport-2.2.2/lib/active_support/
> > > dependencies.rb:153:in `require'
> > > /Library/Ruby/Gems/1.8/gems/rails-2.2.2/lib/tasks/misc.rake:3
> > > /Library/Ruby/Gems/1.8/gems/rake-0.8.4/lib/rake.rb:617:in `call'
> > > /Library/Ruby/Gems/1.8/gems/rake-0.8.4/lib/rake.rb:617:in `execute'
> > > /Library/Ruby/Gems/1.8/gems/rake-0.8.4/lib/rake.rb:612:in `each'
> > > /Library/Ruby/Gems/1.8/gems/rake-0.8.4/lib/rake.rb:612:in `execute'
> > > /Library/Ruby/Gems/1.8/gems/rake-0.8.4/lib/rake.rb:578:in
> > > `invoke_with_call_chain'
> > > /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/
> > > 1.8/monitor.rb:242:in `synchronize'
> > > /Library/Ruby/Gems/1.8/gems/rake-0.8.4/lib/rake.rb:571:in
> > > `invoke_with_call_chain'
> > > /Library/Ruby/Gems/1.8/gems/rake-0.8.4/lib/rake.rb:564:in `invoke'
> > > /Library/Ruby/Gems/1.8/gems/rails-2.2.2/lib/tasks/gems.rake:21
> > > /Library/Ruby/Gems/1.8/gems/rake-0.8.4/lib/rake.rb:617:in `call'
> > > /Library/Ruby/Gems/1.8/gems/rake-0.8.4/lib/rake.rb:617:in `execute'
> > > /Library/Ruby/Gems/1.8/gems/rake-0.8.4/lib/rake.rb:612:in `each'
> > > /Library/Ruby/Gems/1.8/gems/rake-0.8.4/lib/rake.rb:612:in `execute'
> > > /Library/Ruby/Gems/1.8/gems/rake-0.8.4/lib/rake.rb:578:in
> > > `invoke_with_call_chain'
> > > /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/
> > > 1.8/monitor.rb:242:in `synchronize'
> > > /Library/Ruby/Gems/1.8/gems/rake-0.8.4/lib/rake.rb:571:in
> > > `invoke_with_call_chain'
> > > /Library/Ruby/Gems/1.8/gems/rake-0.8.4/lib/rake.rb:588:in
> > > `invoke_prerequisites'
> > > /Library/Ruby/Gems/1.8/gems/rake-0.8.4/lib/rake.rb:585:in `each'
> > > /Library/Ruby/Gems/1.8/gems/rake-0.8.4/lib/rake.rb:585:in
> > > `invoke_prerequisites'
> > > /Library/Ruby/Gems/1.8/gems/rake-0.8.4/lib/rake.rb:577:in
> > > `invoke_with_call_chain'
> > > /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/
> > > 1.8/monitor.rb:242:in `synchronize'
> > > /Library/Ruby/Gems/1.8/gems/rake-0.8.4/lib/rake.rb:571:in
> > > `invoke_with_call_chain'
> > > /Library/Ruby/Gems/1.8/gems/rake-0.8.4/lib/rake.rb:564:in `invoke'
> > > /Library/Ruby/Gems/1.8/gems/rake-0.8.4/lib/rake.rb:2027:in
> > > `invoke_task'
> > > /Library/Ruby/Gems/1.8/gems/rake-0.8.4/lib/rake.rb:2005:in `top_level'
> > > /Library/Ruby/Gems/1.8/gems/rake-0.8.4/lib/rake.rb:2005:in `each'
> > > /Library/Ruby/Gems/1.8/gems/rake-0.8.4/lib/rake.rb:2005:in `top_level'
> > > /Library/Ruby/Gems/1.8/gems/rake-0.8.4/lib/rake.rb:2044:in
> > > `standard_exception_handling'
> > > /Library/Ruby/Gems/1.8/gems/rake-0.8.4/lib/rake.rb:1999:in `top_level'
> > > /Library/Ruby/Gems/1.8/gems/rake-0.8.4/lib/rake.rb:1977:in `run'
> > > /Library/Ruby/Gems/1.8/gems/rake-0.8.4/lib/rake.rb:2044:in
> > > `standard_exception_handling'
> > > /Library/Ruby/Gems/1.8/gems/rake-0.8.4/lib/rake.rb:1974:in `run'
> > > /Library/Ruby/Gems/1.8/gems/rake-0.8.4/bin/rake:31
> > > /usr/bin/rake:19:in `load'
> > > /usr/bin/rake:19
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