# How? Why? Production Woes **URL:** \ **Category:** Rails\ **Created:** [September 9, 2008, 4:26pm UTC](https://www.ruby-forum.com/t/how-why-production-woes/148127 "2008-09-09T16:26:33Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![jeremy](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/82dd89/32.png) [@jeremy](https://www.ruby-forum.com/u/jeremy)\ **Post date:** [September 9, 2008, 4:26pm UTC](https://www.ruby-forum.com/t/how-why-production-woes/148127/1 "2008-09-09T16:26:33Z")
So, I can migrate without error in development, but when I migrate in production I get what’s below. The gems are the same, rails is the same version…what am I missing? [root@uranus current]# rake db:migrate RAILS\_ENV=production --trace (in /apps/listjutsu/releases/20080909133505) \*\* Invoke db:migrate (first\_time) \*\* Invoke environment (first\_time) \*\* Execute environment rake aborted! uninitialized constant User::Authentication /usr/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active\_support/ dependencies.rb:492:in `const_missing' /apps/listjutsu/releases/20080909133505/app/models/user.rb:4 /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in`gem\_original\_require’ /usr/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb:27:in `require' /usr/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/ dependencies.rb:509:in`require’ /usr/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active\_support/ dependencies.rb:354:in `new_constants_in' /usr/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/ dependencies.rb:509:in`require’ /usr/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active\_support/ dependencies.rb:101:in `require_or_load' /usr/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/ dependencies.rb:260:in`load\_missing\_constant’ /usr/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active\_support/ dependencies.rb:467:in `const_missing' /usr/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/ dependencies.rb:479:in`const\_missing’ /usr/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active\_support/ inflector.rb:283:in `constantize' /usr/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/ core_ext/string/inflections.rb:143:in`constantize’ /usr/lib/ruby/gems/1.8/gems/activerecord-2.1.0/lib/active\_record/ observer.rb:157:in `observed_class' /usr/lib/ruby/gems/1.8/gems/activerecord-2.1.0/lib/active_record/ observer.rb:183:in`observed\_classes’ /usr/lib/ruby/gems/1.8/gems/activerecord-2.1.0/lib/active\_record/ observer.rb:166:in `initialize' /usr/lib/ruby/1.8/singleton.rb:95:in`new’ /usr/lib/ruby/1.8/singleton.rb:95:in `instance' /usr/lib/ruby/gems/1.8/gems/activerecord-2.1.0/lib/active_record/ observer.rb:38:in`instantiate\_observers’ /usr/lib/ruby/gems/1.8/gems/activerecord-2.1.0/lib/active\_record/ observer.rb:36:in `each' /usr/lib/ruby/gems/1.8/gems/activerecord-2.1.0/lib/active_record/ observer.rb:36:in`instantiate\_observers’ /usr/lib/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_controller/ dispatcher.rb:26:in `define_dispatcher_callbacks' /usr/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/ callbacks.rb:177:in`call’ /usr/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active\_support/ callbacks.rb:177:in `evaluate_method' /usr/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/ callbacks.rb:161:in`call’ /usr/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active\_support/ callbacks.rb:90:in `run' /usr/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/ callbacks.rb:90:in`each’ /usr/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active\_support/ callbacks.rb:90:in `send' /usr/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/ callbacks.rb:90:in`run’ /usr/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active\_support/ callbacks.rb:272:in `run_callbacks' /usr/lib/ruby/gems/1.8/gems/rails-2.1.0/lib/initializer.rb:483:in`send’ /usr/lib/ruby/gems/1.8/gems/rails-2.1.0/lib/initializer.rb:483:in `prepare_dispatcher' /usr/lib/ruby/gems/1.8/gems/rails-2.1.0/lib/initializer.rb:151:in`process’ /usr/lib/ruby/gems/1.8/gems/rails-2.1.0/lib/initializer.rb:93:in `send' /usr/lib/ruby/gems/1.8/gems/rails-2.1.0/lib/initializer.rb:93:in`run’ /apps/listjutsu/releases/20080909133505/config/environment.rb:13 /usr/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb:27:in `gem_original_require' /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in`require’ /usr/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active\_support/ dependencies.rb:509:in `require' /usr/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/ dependencies.rb:354:in`new\_constants\_in’ /usr/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active\_support/ dependencies.rb:509:in `require' /usr/lib/ruby/gems/1.8/gems/rails-2.1.0/lib/tasks/misc.rake:3 /usr/lib/ruby/gems/1.8/gems/rake-0.8.1/lib/rake.rb:546:in`call’ /usr/lib/ruby/gems/1.8/gems/rake-0.8.1/lib/rake.rb:546:in `execute' /usr/lib/ruby/gems/1.8/gems/rake-0.8.1/lib/rake.rb:541:in`each’ /usr/lib/ruby/gems/1.8/gems/rake-0.8.1/lib/rake.rb:541:in `execute' /usr/lib/ruby/gems/1.8/gems/rake-0.8.1/lib/rake.rb:508:in`invoke\_with\_call\_chain’ /usr/lib/ruby/1.8/thread.rb:135:in `synchronize' /usr/lib/ruby/gems/1.8/gems/rake-0.8.1/lib/rake.rb:501:in`invoke\_with\_call\_chain’ /usr/lib/ruby/gems/1.8/gems/rake-0.8.1/lib/rake.rb:518:in `invoke_prerequisites' /usr/lib/ruby/gems/1.8/gems/rake-0.8.1/lib/rake.rb:1183:in`each’ /usr/lib/ruby/gems/1.8/gems/rake-0.8.1/lib/rake.rb:1183:in `send' /usr/lib/ruby/gems/1.8/gems/rake-0.8.1/lib/rake.rb:1183:in`each’ /usr/lib/ruby/gems/1.8/gems/rake-0.8.1/lib/rake.rb:515:in `invoke_prerequisites' /usr/lib/ruby/gems/1.8/gems/rake-0.8.1/lib/rake.rb:507:in`invoke\_with\_call\_chain’ /usr/lib/ruby/1.8/thread.rb:135:in `synchronize' /usr/lib/ruby/gems/1.8/gems/rake-0.8.1/lib/rake.rb:501:in`invoke\_with\_call\_chain’ /usr/lib/ruby/gems/1.8/gems/rake-0.8.1/lib/rake.rb:494:in `invoke' /usr/lib/ruby/gems/1.8/gems/rake-0.8.1/lib/rake.rb:1931:in`invoke\_task’ /usr/lib/ruby/gems/1.8/gems/rake-0.8.1/lib/rake.rb:1909:in `top_level' /usr/lib/ruby/gems/1.8/gems/rake-0.8.1/lib/rake.rb:1909:in`each’ /usr/lib/ruby/gems/1.8/gems/rake-0.8.1/lib/rake.rb:1909:in `top_level' /usr/lib/ruby/gems/1.8/gems/rake-0.8.1/lib/rake.rb:1948:in`standard\_exception\_handling’ /usr/lib/ruby/gems/1.8/gems/rake-0.8.1/lib/rake.rb:1903:in `top_level' /usr/lib/ruby/gems/1.8/gems/rake-0.8.1/lib/rake.rb:1881:in`run’ /usr/lib/ruby/gems/1.8/gems/rake-0.8.1/lib/rake.rb:1948:in `standard_exception_handling' /usr/lib/ruby/gems/1.8/gems/rake-0.8.1/lib/rake.rb:1878:in`run’ /usr/lib/ruby/gems/1.8/gems/rake-0.8.1/bin/rake:31 /usr/bin/rake:19:in `load’ /usr/bin/rake:19 ---
**Author:** ![jeremy](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/82dd89/32.png) [@jeremy](https://www.ruby-forum.com/u/jeremy)\ **Post date:** [September 9, 2008, 4:27pm UTC](https://www.ruby-forum.com/t/how-why-production-woes/148127/2 "2008-09-09T16:27:44Z")
Did you try to: rake db:migrate VERSION=0 rake db:migrate You will probably face the same problem… Rodrigo. ---
**Author:** ![jeremy](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/82dd89/32.png) [@jeremy](https://www.ruby-forum.com/u/jeremy)\ **Post date:** [September 9, 2008, 4:28pm UTC](https://www.ruby-forum.com/t/how-why-production-woes/148127/3 "2008-09-09T16:28:19Z")
Anyway, you should check this one: /apps/listjutsu/releases/20080909133505/app/models/user.rb:4 Rodrigo. ---
**Author:** ![jeremy](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/82dd89/32.png) [@jeremy](https://www.ruby-forum.com/u/jeremy)\ **Post date:** [September 9, 2008, 4:40pm UTC](https://www.ruby-forum.com/t/how-why-production-woes/148127/4 "2008-09-09T16:40:03Z")
Actually, yes I tried running the migration from the beginning with a clean db (and backwards for good measure) and it works just fine and dandy in development. \* scratches head \* On Sep 9, 10:08 am, Rodrigo Rosenfeld R. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) ---
**Author:** ![jeremy](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/82dd89/32.png) [@jeremy](https://www.ruby-forum.com/u/jeremy)\ **Post date:** [September 9, 2008, 4:44pm UTC](https://www.ruby-forum.com/t/how-why-production-woes/148127/5 "2008-09-09T16:44:10Z")
Alright, nevermind. Apparently for whatever reason the restful\_authentication plugin directory didn’t make it into my git repo. \>:-( ---
**Author:** ![jeremy](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/82dd89/32.png) [@jeremy](https://www.ruby-forum.com/u/jeremy)\ **Post date:** [January 4, 2009, 9:58pm UTC](https://www.ruby-forum.com/t/how-why-production-woes/148127/6 "2009-01-04T21:58:50Z")
Jeremy wrote: > Alright, nevermind. Apparently for whatever reason the > restful\_authentication plugin directory didn’t make it into my git > repo. \>:-( I had the same problem. I probably originally used: ./script/plugin install git://github.com/technoweenie/restful-authentication.git In any case, my restful\_authentication folder was there in the project, but it’s contents for whatever reason were silently never added to the repo. ---
**Author:** ![jeremy](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/82dd89/32.png) [@jeremy](https://www.ruby-forum.com/u/jeremy)\ **Post date:** [January 4, 2009, 10:53pm UTC](https://www.ruby-forum.com/t/how-why-production-woes/148127/7 "2009-01-04T22:53:11Z")
Don’t look at the rest of the error message, here is your problem: > uninitialized constant User::Authentication I am pretty sure, during development you have mispelled User or authentication, and it only appears now when you want to run a migration on a fresh server. Use the grep tool to hunt it down in your code. – Video tutorial training by screencasts at [http://www.digiprof.fr](http://www.digiprof.fr)