When I execute rails s the server won't open and I receive the following error:
Users/thomaspouliquen/whereisthepolice/config/routes.rb:2:in `<top (required)>': uninitialized constant Omrails (NameError)
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.12/lib/rails/application/routes_reloader.rb:40:in `block in load_paths'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.12/lib/rails/application/routes_reloader.rb:40:in `each'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.12/lib/rails/application/routes_reloader.rb:40:in `load_paths'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.12/lib/rails/application/routes_reloader.rb:16:in `reload!'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.12/lib/rails/application.rb:108:in `reload_routes!'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/devise-3.2.1/lib/devise/rails.rb:14:in `block in <class:Engine>'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.12/lib/active_support/lazy_load_hooks.rb:34:in `call'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.12/lib/active_support/lazy_load_hooks.rb:34:in `execute_hook'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.12/lib/active_support/lazy_load_hooks.rb:43:in `block in run_load_hooks'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.12/lib/active_support/lazy_load_hooks.rb:42:in `each'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.12/lib/active_support/lazy_load_hooks.rb:42:in `run_load_hooks'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.12/lib/rails/application/finisher.rb:52:in `block in <module:Finisher>'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.12/lib/rails/initializable.rb:30:in `instance_exec'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.12/lib/rails/initializable.rb:30:in `run'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.12/lib/rails/initializable.rb:55:in `block in run_initializers'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.12/lib/rails/initializable.rb:54:in `each'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.12/lib/rails/initializable.rb:54:in `run_initializers'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.12/lib/rails/application.rb:136:in `initialize!'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.12/lib/rails/railtie/configurable.rb:30:in `method_missing'
from /Users/thomaspouliquen/whereisthepolice/config/environment.rb:5:in `<top (required)>'
from /Users/thomaspouliquen/whereisthepolice/config.ru:3:in `block in <main>'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/rack-1.4.5/lib/rack/builder.rb:51:in `instance_eval'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/rack-1.4.5/lib/rack/builder.rb:51:in `initialize'
from /Users/thomaspouliquen/whereisthepolice/config.ru:in `new'
from /Users/thomaspouliquen/whereisthepolice/config.ru:in `<main>'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/rack-1.4.5/lib/rack/builder.rb:40:in `eval'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/rack-1.4.5/lib/rack/builder.rb:40:in `parse_file'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/rack-1.4.5/lib/rack/server.rb:200:in `app'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.12/lib/rails/commands/server.rb:46:in `app'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/rack-1.4.5/lib/rack/server.rb:304:in `wrapped_app'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/rack-1.4.5/lib/rack/server.rb:254:in `start'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.12/lib/rails/commands/server.rb:70:in `start'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.12/lib/rails/commands.rb:55:in `block in <top (required)>'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.12/lib/rails/commands.rb:50:in `tap'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.12/lib/rails/commands.rb:50:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'
What is the issue?
Did you by any chance change the name of your application?
Perhaps it was named WhereIsThePolice and now it's Omrails?
If you want to change the name of your app, you have to make changes to several files, so let me know if this is the case.
Related
I installed ActiveAdmin to manage the Admin end of my Rails app and everything was absolutely fine till I generated a model for ActiveAdmin. Now the rails server fails to start, even Rake Rollback or rails d active_admin:resource MyModel doesn't work. I am clueless now, might be a simple stupid error but still I can't figure it out, BTW here's the error dump.
/home/ubuntu/workspace/app/admin/products.rb:1:in `<top (required)>': uninitialized constant Products (NameError)
from /usr/local/rvm/gems/ruby-2.3.0/bundler/gems/activeadmin-f8926831429f/lib/active_admin/application.rb:216:in `block in load'
from /usr/local/rvm/gems/ruby-2.3.0/bundler/gems/activeadmin-f8926831429f/lib/active_admin/error.rb:41:in `capture'
from /usr/local/rvm/gems/ruby-2.3.0/bundler/gems/activeadmin-f8926831429f/lib/active_admin/application.rb:216:in `load'
from /usr/local/rvm/gems/ruby-2.3.0/bundler/gems/activeadmin-f8926831429f/lib/active_admin/application.rb:208:in `block in load!'
from /usr/local/rvm/gems/ruby-2.3.0/bundler/gems/activeadmin-f8926831429f/lib/active_admin/application.rb:208:in `each'
from /usr/local/rvm/gems/ruby-2.3.0/bundler/gems/activeadmin-f8926831429f/lib/active_admin/application.rb:208:in `load!'
from /usr/local/rvm/gems/ruby-2.3.0/bundler/gems/activeadmin-f8926831429f/lib/active_admin/application.rb:230:in `routes'
from /usr/local/rvm/gems/ruby-2.3.0/bundler/gems/activeadmin-f8926831429f/lib/active_admin.rb:79:in `routes'
from /home/ubuntu/workspace/config/routes.rb:4:in `block in <top (required)>'
from /usr/local/rvm/gems/ruby-2.3.0/gems/actionpack-4.2.5/lib/action_dispatch/routing/route_set.rb:434:in `instance_exec'
from /usr/local/rvm/gems/ruby-2.3.0/gems/actionpack-4.2.5/lib/action_dispatch/routing/route_set.rb:434:in `eval_block'
from /usr/local/rvm/gems/ruby-2.3.0/gems/actionpack-4.2.5/lib/action_dispatch/routing/route_set.rb:412:in `draw'
from /home/ubuntu/workspace/config/routes.rb:1:in `<top (required)>'
from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/application/routes_reloader.rb:40:in `block in load_paths'
from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/application/routes_reloader.rb:40:in `each'
from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/application/routes_reloader.rb:40:in `load_paths'
from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/application/routes_reloader.rb:16:in `reload!'
from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/application/routes_reloader.rb:26:in `block in updater'
from /usr/local/rvm/gems/ruby-2.3.0/gems/activesupport-4.2.5/lib/active_support/file_update_checker.rb:75:in `execute'
from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/application/routes_reloader.rb:27:in `updater'
from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/application/routes_reloader.rb:7:in `execute_if_updated'
from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/application/finisher.rb:69:in `block in <module:Finisher>'
from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/initializable.rb:30:in `instance_exec'
from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/initializable.rb:30:in `run'
from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/initializable.rb:55:in `block in run_initializers'
from /usr/local/rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:228:in `block in tsort_each'
from /usr/local/rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component'
from /usr/local/rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:431:in `each_strongly_connected_component_from'
from /usr/local/rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:349:in `block in each_strongly_connected_component'
from /usr/local/rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:347:in `each'
from /usr/local/rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:347:in `call'
from /usr/local/rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:347:in `each_strongly_connected_component'
from /usr/local/rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:226:in `tsort_each'
from /usr/local/rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:205:in `tsort_each'
from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/initializable.rb:54:in `run_initializers'
from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/application.rb:352:in `initialize!'
from /home/ubuntu/workspace/config/environment.rb:5:in `<top (required)>'
from /home/ubuntu/workspace/config.ru:3:in `block in <main>'
from /usr/local/rvm/gems/ruby-2.3.0/gems/rack-1.6.4/lib/rack/builder.rb:55:in `instance_eval'
from /usr/local/rvm/gems/ruby-2.3.0/gems/rack-1.6.4/lib/rack/builder.rb:55:in `initialize'
from /home/ubuntu/workspace/config.ru:in `new'
from /home/ubuntu/workspace/config.ru:in `<main>'
from /usr/local/rvm/gems/ruby-2.3.0/gems/rack-1.6.4/lib/rack/builder.rb:49:in `eval'
from /usr/local/rvm/gems/ruby-2.3.0/gems/rack-1.6.4/lib/rack/builder.rb:49:in `new_from_string'
from /usr/local/rvm/gems/ruby-2.3.0/gems/rack-1.6.4/lib/rack/builder.rb:40:in `parse_file'
from /usr/local/rvm/gems/ruby-2.3.0/gems/rack-1.6.4/lib/rack/server.rb:299:in `build_app_and_options_from_config'
from /usr/local/rvm/gems/ruby-2.3.0/gems/rack-1.6.4/lib/rack/server.rb:208:in `app'
from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/commands/server.rb:61:in `app'
from /usr/local/rvm/gems/ruby-2.3.0/gems/rack-1.6.4/lib/rack/server.rb:336:in `wrapped_app'
from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/commands/server.rb:139:in `log_to_stdout'
from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/commands/server.rb:78:in `start'
from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:80:in `block in server'
from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:75:in `tap'
from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:75:in `server'
from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/commands.rb:17:in `<top (required)>'
from /home/ubuntu/workspace/bin/rails:9:in `require'
from /home/ubuntu/workspace/bin/rails:9:in `<top (required)>'
from /usr/local/rvm/gems/ruby-2.3.0/gems/spring-1.7.2/lib/spring/client/rails.rb:28:in `load'
from /usr/local/rvm/gems/ruby-2.3.0/gems/spring-1.7.2/lib/spring/client/rails.rb:28:in `call'
from /usr/local/rvm/gems/ruby-2.3.0/gems/spring-1.7.2/lib/spring/client/command.rb:7:in `call'
from /usr/local/rvm/gems/ruby-2.3.0/gems/spring-1.7.2/lib/spring/client.rb:30:in `run'
from /usr/local/rvm/gems/ruby-2.3.0/gems/spring-1.7.2/bin/spring:49:in `<top (required)>'
from /usr/local/rvm/gems/ruby-2.3.0/gems/spring-1.7.2/lib/spring/binstub.rb:11:in `load'
from /usr/local/rvm/gems/ruby-2.3.0/gems/spring-1.7.2/lib/spring/binstub.rb:11:in `<top (required)>'
from /home/ubuntu/workspace/bin/spring:13:in `require'
from /home/ubuntu/workspace/bin/spring:13:in `<top (required)>'
from bin/rails:3:in `load'
from bin/rails:3:in `<main>'
Here is annoyance I have with strack traces in rails -- they print the error first which means to view any error, you have scroll up in your termanl to see what the error is.
is there a way by which the error & stracktrace can be printed in reverse order, so you can view the error without having to scroll. for example:
This is rails/ruby currently prints stracktraces:
/activesupport/lib/active_support/dependencies.rb:228:in `require': cannot load such file -- pry (LoadError)
from /activesupport/lib/active_support/dependencies.rb:228:in `block in require'
from /activesupport/lib/active_support/dependencies.rb:213:in `load_dependency'
from /activesupport/lib/active_support/dependencies.rb:228:in `require'
from /actionpack/lib/action_dispatch/routing/mapper.rb:307:in `normalize_path'
from /actionpack/lib/action_dispatch/routing/mapper.rb:79:in `normalize_path!'
from /actionpack/lib/action_dispatch/routing/mapper.rb:65:in `initialize'
from /actionpack/lib/action_dispatch/routing/mapper.rb:1429:in `new'
from /actionpack/lib/action_dispatch/routing/mapper.rb:1429:in `add_route'
from /actionpack/lib/action_dispatch/routing/mapper.rb:1408:in `decomposed_match'
from /actionpack/lib/action_dispatch/routing/mapper.rb:1389:in `block in match'
from /actionpack/lib/action_dispatch/routing/mapper.rb:1380:in `each'
from /actionpack/lib/action_dispatch/routing/mapper.rb:1380:in `match'
from /actionpack/lib/action_dispatch/routing/mapper.rb:502:in `mount'
from /ruby-2.0.0-p0/bundler/gems/sprockets-rails-bbf755e8b3aa/lib/sprockets/railtie.rb:125:in `block (2 levels) in <class:Railtie>'
from /actionpack/lib/action_dispatch/routing/route_set.rb:315:in `instance_exec'
from /actionpack/lib/action_dispatch/routing/route_set.rb:315:in `eval_block'
from /actionpack/lib/action_dispatch/routing/route_set.rb:330:in `block in clear!'
from /actionpack/lib/action_dispatch/routing/route_set.rb:330:in `each'
from /actionpack/lib/action_dispatch/routing/route_set.rb:330:in `clear!'
from /railties/lib/rails/application/routes_reloader.rb:35:in `block in clear!'
from /railties/lib/rails/application/routes_reloader.rb:33:in `each'
from /railties/lib/rails/application/routes_reloader.rb:33:in `clear!'
from /railties/lib/rails/application/routes_reloader.rb:15:in `reload!'
from /railties/lib/rails/application/routes_reloader.rb:26:in `block in updater'
from /activesupport/lib/active_support/file_update_checker.rb:75:in `call'
from /activesupport/lib/active_support/file_update_checker.rb:75:in `execute'
from /railties/lib/rails/application/routes_reloader.rb:27:in `updater'
from /railties/lib/rails/application/routes_reloader.rb:7:in `execute_if_updated'
from /railties/lib/rails/application/finisher.rb:69:in `block in <module:Finisher>'
from /railties/lib/rails/initializable.rb:30:in `instance_exec'
from /railties/lib/rails/initializable.rb:30:in `run'
from /railties/lib/rails/initializable.rb:55:in `block in run_initializers'
from ruby-2.0.0-p0/lib/ruby/2.0.0/tsort.rb:150:in `block in tsort_each'
from ruby-2.0.0-p0/lib/ruby/2.0.0/tsort.rb:183:in `block (2 levels) in each_strongly_connected_component'
from ruby-2.0.0-p0/lib/ruby/2.0.0/tsort.rb:219:in `each_strongly_connected_component_from'
from ruby-2.0.0-p0/lib/ruby/2.0.0/tsort.rb:182:in `block in each_strongly_connected_component'
from ruby-2.0.0-p0/lib/ruby/2.0.0/tsort.rb:180:in `each'
from ruby-2.0.0-p0/lib/ruby/2.0.0/tsort.rb:180:in `each_strongly_connected_component'
from ruby-2.0.0-p0/lib/ruby/2.0.0/tsort.rb:148:in `tsort_each'
from /railties/lib/rails/initializable.rb:54:in `run_initializers'
from /railties/lib/rails/application.rb:214:in `initialize!'
from /railties/lib/rails/railtie/configurable.rb:30:in `method_missing'
from /demo/config/environment.rb:5:in `<top (required)>'
from /demo/config.ru:3:in `require'
from /demo/config.ru:3:in `block in <main>'
from /ruby-2.0.0-p0/gems/rack-1.5.2/lib/rack/builder.rb:55:in `instance_eval'
from /ruby-2.0.0-p0/gems/rack-1.5.2/lib/rack/builder.rb:55:in `initialize'
from /demo/config.ru:in `new'
from /demo/config.ru:in `<main>'
from /ruby-2.0.0-p0/gems/rack-1.5.2/lib/rack/builder.rb:49:in `eval'
from /ruby-2.0.0-p0/gems/rack-1.5.2/lib/rack/builder.rb:49:in `new_from_string'
from /ruby-2.0.0-p0/gems/rack-1.5.2/lib/rack/builder.rb:40:in `parse_file'
from /ruby-2.0.0-p0/gems/rack-1.5.2/lib/rack/server.rb:277:in `build_app_and_options_from_config'
from /ruby-2.0.0-p0/gems/rack-1.5.2/lib/rack/server.rb:199:in `app'
from /railties/lib/rails/commands/server.rb:48:in `app'
from /ruby-2.0.0-p0/gems/rack-1.5.2/lib/rack/server.rb:314:in `wrapped_app'
from /railties/lib/rails/commands/server.rb:75:in `start'
from /railties/lib/rails/commands.rb:80:in `block in <top (required)>'
from /railties/lib/rails/commands.rb:75:in `tap'
from /railties/lib/rails/commands.rb:75:in `<top (required)>'
from bin/rails:4:in `require'
from bin/rails:4:in `<main>'
Is there a way by which I can get this same stracktrace in reverse order, so I don't have to scroll my terminal everytime i get a error. something similar to this:
from bin/rails:4:in `<main>'
from bin/rails:4:in `require'
from /railties/lib/rails/commands.rb:75:in `<top (required)>'
from /railties/lib/rails/commands.rb:75:in `tap'
from /railties/lib/rails/commands.rb:80:in `block in <top (required)>'
from /railties/lib/rails/commands/server.rb:75:in `start'
from /ruby-2.0.0-p0/gems/rack-1.5.2/lib/rack/server.rb:314:in `wrapped_app'
from /railties/lib/rails/commands/server.rb:48:in `app'
from /ruby-2.0.0-p0/gems/rack-1.5.2/lib/rack/server.rb:199:in `app'
from /ruby-2.0.0-p0/gems/rack-1.5.2/lib/rack/server.rb:277:in `build_app_and_options_from_config'
from /ruby-2.0.0-p0/gems/rack-1.5.2/lib/rack/builder.rb:40:in `parse_file'
from /ruby-2.0.0-p0/gems/rack-1.5.2/lib/rack/builder.rb:49:in `new_from_string'
from /ruby-2.0.0-p0/gems/rack-1.5.2/lib/rack/builder.rb:49:in `eval'
from /demo/config.ru:in `<main>'
from /demo/config.ru:in `new'
from /ruby-2.0.0-p0/gems/rack-1.5.2/lib/rack/builder.rb:55:in `initialize'
from /ruby-2.0.0-p0/gems/rack-1.5.2/lib/rack/builder.rb:55:in `instance_eval'
from /demo/config.ru:3:in `block in <main>'
from /demo/config.ru:3:in `require'
from /demo/config/environment.rb:5:in `<top (required)>'
from /railties/lib/rails/railtie/configurable.rb:30:in `method_missing'
from /railties/lib/rails/application.rb:214:in `initialize!'
from /railties/lib/rails/initializable.rb:54:in `run_initializers'
from ruby-2.0.0-p0/lib/ruby/2.0.0/tsort.rb:148:in `tsort_each'
from ruby-2.0.0-p0/lib/ruby/2.0.0/tsort.rb:180:in `each_strongly_connected_component'
from ruby-2.0.0-p0/lib/ruby/2.0.0/tsort.rb:180:in `each'
from ruby-2.0.0-p0/lib/ruby/2.0.0/tsort.rb:182:in `block in each_strongly_connected_component'
from ruby-2.0.0-p0/lib/ruby/2.0.0/tsort.rb:219:in `each_strongly_connected_component_from'
from ruby-2.0.0-p0/lib/ruby/2.0.0/tsort.rb:183:in `block (2 levels) in each_strongly_connected_component'
from ruby-2.0.0-p0/lib/ruby/2.0.0/tsort.rb:150:in `block in tsort_each'
from /railties/lib/rails/initializable.rb:55:in `block in run_initializers'
from /railties/lib/rails/initializable.rb:30:in `run'
from /railties/lib/rails/initializable.rb:30:in `instance_exec'
from /railties/lib/rails/application/finisher.rb:69:in `block in <module:Finisher>'
from /railties/lib/rails/application/routes_reloader.rb:7:in `execute_if_updated'
from /railties/lib/rails/application/routes_reloader.rb:27:in `updater'
from /activesupport/lib/active_support/file_update_checker.rb:75:in `execute'
from /activesupport/lib/active_support/file_update_checker.rb:75:in `call'
from /railties/lib/rails/application/routes_reloader.rb:26:in `block in updater'
from /railties/lib/rails/application/routes_reloader.rb:15:in `reload!'
from /railties/lib/rails/application/routes_reloader.rb:33:in `clear!'
from /railties/lib/rails/application/routes_reloader.rb:33:in `each'
from /railties/lib/rails/application/routes_reloader.rb:35:in `block in clear!'
from /actionpack/lib/action_dispatch/routing/route_set.rb:330:in `clear!'
from /actionpack/lib/action_dispatch/routing/route_set.rb:330:in `each'
from /actionpack/lib/action_dispatch/routing/route_set.rb:330:in `block in clear!'
from /actionpack/lib/action_dispatch/routing/route_set.rb:315:in `eval_block'
from /actionpack/lib/action_dispatch/routing/route_set.rb:315:in `instance_exec'
from /ruby-2.0.0-p0/bundler/gems/sprockets-rails-bbf755e8b3aa/lib/sprockets/railtie.rb:125:in `block (2 levels) in <class:Railtie>'
from /actionpack/lib/action_dispatch/routing/mapper.rb:502:in `mount'
from /actionpack/lib/action_dispatch/routing/mapper.rb:1380:in `match'
from /actionpack/lib/action_dispatch/routing/mapper.rb:1380:in `each'
from /actionpack/lib/action_dispatch/routing/mapper.rb:1389:in `block in match'
from /actionpack/lib/action_dispatch/routing/mapper.rb:1408:in `decomposed_match'
from /actionpack/lib/action_dispatch/routing/mapper.rb:1429:in `add_route'
from /actionpack/lib/action_dispatch/routing/mapper.rb:1429:in `new'
from /actionpack/lib/action_dispatch/routing/mapper.rb:65:in `initialize'
from /actionpack/lib/action_dispatch/routing/mapper.rb:79:in `normalize_path!'
from /actionpack/lib/action_dispatch/routing/mapper.rb:307:in `normalize_path'
from /activesupport/lib/active_support/dependencies.rb:228:in `require'
from /activesupport/lib/active_support/dependencies.rb:213:in `load_dependency'
from /activesupport/lib/active_support/dependencies.rb:228:in `block in require'
/activesupport/lib/active_support/dependencies.rb:228:in `require': cannot load such file -- pry (LoadError)
Possible?
There are several ways to do this.
If you're in irb, or the debugger something like:
caller.reverse
Will give you what you want.
The alternative then is to wrap all your code like so
begin
all the code
rescue StandardError => e
puts e.backtrace.reverse
end
And finally you could extend backtrace on Exception to print caller.reverse but extending core modules is not a great idea at all.
I ran a bundle install and since have not been able to run rails s successfully within terminal. I am new to rails and have tried to find help on this but nobody can explain it to me in the 101 way. What is going wrong - it looks like this is a NameError?
=> Call with -d to detach
=> Ctrl-C to shutdown server
Exiting
/usr/local/rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.2.8/lib/active_support/inflector/methods.rb:230:in `block in constantize': uninitialized constant Use (NameError)
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.2.8/lib/active_support/inflector/methods.rb:229:in `each'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.2.8/lib/active_support/inflector/methods.rb:229:in `constantize'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/devise-2.2.3/lib/devise.rb:267:in `get'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/devise-2.2.3/lib/devise/mapping.rb:77:in `to'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/devise-2.2.3/lib/devise/mapping.rb:72:in `modules'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/devise-2.2.3/lib/devise/mapping.rb:89:in `routes'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/devise-2.2.3/lib/devise/mapping.rb:156:in `default_used_route'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/devise-2.2.3/lib/devise/mapping.rb:66:in `initialize'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/devise-2.2.3/lib/devise.rb:301:in `new'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/devise-2.2.3/lib/devise.rb:301:in `add_mapping'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/devise-2.2.3/lib/devise/rails/routes.rb:208:in `block in devise_for'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/devise-2.2.3/lib/devise/rails/routes.rb:207:in `each'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/devise-2.2.3/lib/devise/rails/routes.rb:207:in `devise_for'
from /Users/cfictum/Documents/rails_projects/omrails/config/routes.rb:3:in `block in <top (required)>'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.2.8/lib/action_dispatch/routing/route_set.rb:282:in `instance_exec'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.2.8/lib/action_dispatch/routing/route_set.rb:282:in `eval_block'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.2.8/lib/action_dispatch/routing/route_set.rb:260:in `draw'
from /Users/cfictum/Documents/rails_projects/omrails/config/routes.rb:1:in `<top (required)>'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/application/routes_reloader.rb:40:in `block in load_paths'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/application/routes_reloader.rb:40:in `each'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/application/routes_reloader.rb:40:in `load_paths'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/application/routes_reloader.rb:16:in `reload!'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/application/routes_reloader.rb:26:in `block in updater'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.2.8/lib/active_support/file_update_checker.rb:78:in `call'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.2.8/lib/active_support/file_update_checker.rb:78:in `execute'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/application/routes_reloader.rb:27:in `updater'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/application/routes_reloader.rb:7:in `execute_if_updated'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/application/finisher.rb:66:in `block in <module:Finisher>'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/initializable.rb:30:in `instance_exec'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/initializable.rb:30:in `run'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/initializable.rb:55:in `block in run_initializers'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/initializable.rb:54:in `each'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/initializable.rb:54:in `run_initializers'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/application.rb:136:in `initialize!'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/railtie/configurable.rb:30:in `method_missing'
from /Users/cfictum/Documents/rails_projects/omrails/config/environment.rb:5:in `<top (required)>'
from /Users/cfictum/Documents/rails_projects/omrails/config.ru:4:in `block in <main>'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/rack-1.4.1/lib/rack/builder.rb:51:in `instance_eval'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/rack-1.4.1/lib/rack/builder.rb:51:in `initialize'
from /Users/cfictum/Documents/rails_projects/omrails/config.ru:1:in `new'
from /Users/cfictum/Documents/rails_projects/omrails/config.ru:1:in `<main>'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/rack-1.4.1/lib/rack/builder.rb:40:in `eval'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/rack-1.4.1/lib/rack/builder.rb:40:in `parse_file'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/rack-1.4.1/lib/rack/server.rb:200:in `app'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/commands/server.rb:46:in `app'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/rack-1.4.1/lib/rack/server.rb:301:in `wrapped_app'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/rack-1.4.1/lib/rack/server.rb:252:in `start'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/commands/server.rb:70:in `start'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/commands.rb:55:in `block in <top (required)>'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/commands.rb:50:in `tap'
from /usr/local/rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/commands.rb:50:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'
I think that you have typed Use instead of use, perhaps in config/routes.rb
Case is important, if it starts with a capital letter then it is a constant, rather than a function.
When I run my rails app in development mode, it runs fine. When I run it in production mode, though, it crashes on launch, and I get this output from the server:
/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/actionmailer-3.2.3/lib/action_mailer/base.rb:437:in `method_missing': undefined method `default_url_setting=' for ActionMailer::Base:Class (NoMethodError)
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/actionmailer-3.2.3/lib/action_mailer/railtie.rb:34:in `block (3 levels) in <class:Railtie>'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/actionmailer-3.2.3/lib/action_mailer/railtie.rb:34:in `each'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/actionmailer-3.2.3/lib/action_mailer/railtie.rb:34:in `block (2 levels) in <class:Railtie>'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.2.3/lib/active_support/lazy_load_hooks.rb:36:in `instance_eval'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.2.3/lib/active_support/lazy_load_hooks.rb:36:in `execute_hook'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.2.3/lib/active_support/lazy_load_hooks.rb:43:in `block in run_load_hooks'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.2.3/lib/active_support/lazy_load_hooks.rb:42:in `each'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.2.3/lib/active_support/lazy_load_hooks.rb:42:in `run_load_hooks'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/actionmailer-3.2.3/lib/action_mailer/base.rb:733:in `<class:Base>'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/actionmailer-3.2.3/lib/action_mailer/base.rb:325:in `<module:ActionMailer>'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/actionmailer-3.2.3/lib/action_mailer/base.rb:10:in `<top (required)>'
from /Users/user/Desktop/MetaRepo/MetaWebsite/app/mailers/notification_mailer.rb:1:in `<top (required)>'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:251:in `require'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:251:in `block in require'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:236:in `load_dependency'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:251:in `require'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:359:in `require_or_load'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:313:in `depend_on'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:225:in `require_dependency'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/engine.rb:439:in `block (2 levels) in eager_load!'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/engine.rb:438:in `each'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/engine.rb:438:in `block in eager_load!'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/engine.rb:436:in `each'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/engine.rb:436:in `eager_load!'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/application/finisher.rb:53:in `block in <module:Finisher>'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/initializable.rb:30:in `instance_exec'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/initializable.rb:30:in `run'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/initializable.rb:55:in `block in run_initializers'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/initializable.rb:54:in `each'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/initializable.rb:54:in `run_initializers'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/application.rb:136:in `initialize!'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/railtie/configurable.rb:30:in `method_missing'
from /Users/user/Desktop/MetaRepo/MetaWebsite/config/environment.rb:5:in `<top (required)>'
from /Users/user/Desktop/MetaRepo/MetaWebsite/config.ru:4:in `require'
from /Users/user/Desktop/MetaRepo/MetaWebsite/config.ru:4:in `block in <main>'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/rack-1.4.1/lib/rack/builder.rb:51:in `instance_eval'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/rack-1.4.1/lib/rack/builder.rb:51:in `initialize'
from /Users/user/Desktop/MetaRepo/MetaWebsite/config.ru:1:in `new'
from /Users/user/Desktop/MetaRepo/MetaWebsite/config.ru:1:in `<main>'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/rack-1.4.1/lib/rack/builder.rb:40:in `eval'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/rack-1.4.1/lib/rack/builder.rb:40:in `parse_file'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/rack-1.4.1/lib/rack/server.rb:200:in `app'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/commands/server.rb:46:in `app'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/rack-1.4.1/lib/rack/server.rb:301:in `wrapped_app'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/rack-1.4.1/lib/rack/server.rb:252:in `start'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/commands/server.rb:70:in `start'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/commands.rb:55:in `block in <top (required)>'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/commands.rb:50:in `tap'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/commands.rb:50:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'
Clearly it has something to do with my ActionMailer gem, but I'm completely stumped. Any help is much appreciated!
On the documentation (ctrl+F "default_url"), there is default_url_options. Perhaps you mispelled the method?
config.action_mailer.default_url_options = { :host => "example.com" }
I'm trying to implement the contact form described here.
I get the following error when I run rails server:
/home/user/project/web/config/initializers/app_config.rb:11:in `<top (required)>': uninitialized constant RailsContactForm (NameError)
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/engine.rb:201:in `block (2 levels) in <class:Engine>'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/engine.rb:200:in `each'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/engine.rb:200:in `block in <class:Engine>'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/initializable.rb:25:in `instance_exec'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/initializable.rb:25:in `run'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/initializable.rb:50:in `block in run_initializers'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/initializable.rb:49:in `each'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/initializable.rb:49:in `run_initializers'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/application.rb:134:in `initialize!'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/application.rb:77:in `method_missing'
from /home/user/project/web/config/environment.rb:9:in `<top (required)>'
from /home/user/project/web/config.ru:3:in `block in <main>'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/rack-1.2.3/lib/rack/builder.rb:46:in `instance_eval'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/rack-1.2.3/lib/rack/builder.rb:46:in `initialize'
from /home/user/project/web/config.ru:1:in `new'
from /home/user/project/web/config.ru:1:in `<main>'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/rack-1.2.3/lib/rack/builder.rb:35:in `eval'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/rack-1.2.3/lib/rack/builder.rb:35:in `parse_file'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/rack-1.2.3/lib/rack/server.rb:162:in `app'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/rack-1.2.3/lib/rack/server.rb:253:in `wrapped_app'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/rack-1.2.3/lib/rack/server.rb:204:in `start'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/commands/server.rb:65:in `start'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/commands.rb:30:in `block in <top (required)>'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/commands.rb:27:in `tap'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/commands.rb:27:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'
/home/user/project/web/config/initializers/app_config.rb:11:in `<top (required)>': uninitialized constant RailsContactForm (NameError)
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/engine.rb:201:in `block (2 levels) in <class:Engine>'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/engine.rb:200:in `each'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/engine.rb:200:in `block in <class:Engine>'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/initializable.rb:25:in `instance_exec'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/initializable.rb:25:in `run'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/initializable.rb:50:in `block in run_initializers'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/initializable.rb:49:in `each'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/initializable.rb:49:in `run_initializers'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/application.rb:134:in `initialize!'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/application.rb:77:in `method_missing'
from /home/user/project/web/config/environment.rb:9:in `<top (required)>'
from /home/user/project/web/config.ru:3:in `block in <main>'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/rack-1.2.3/lib/rack/builder.rb:46:in `instance_eval'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/rack-1.2.3/lib/rack/builder.rb:46:in `initialize'
from /home/user/project/web/config.ru:1:in `new'
from /home/user/project/web/config.ru:1:in `<main>'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/rack-1.2.3/lib/rack/builder.rb:35:in `eval'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/rack-1.2.3/lib/rack/builder.rb:35:in `parse_file'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/rack-1.2.3/lib/rack/server.rb:162:in `app'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/rack-1.2.3/lib/rack/server.rb:253:in `wrapped_app'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/rack-1.2.3/lib/rack/server.rb:204:in `start'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/commands/server.rb:65:in `start'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/commands.rb:30:in `block in <top (required)>'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/commands.rb:27:in `tap'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/commands.rb:27:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'
I can see he hasn't defined RailsContactForm anywhere else. I don't know enough rails to know whether this is intentional.
In this line: "RailsContactForm::Application.configure"
RailsContactForm is just the name he gave the application when he ran rails create. Just substitute that with your application name.
In that tutorial RailsContactForm is the name of the main app.
You'll need to change that to your app's name.