Rails devise generate model error - ruby-on-rails

I'm trying to use 'rails generate devise model1' in rails 4, but the following error up.
> /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/actionpack-4.0.0/lib/action_dispatch/routing/mapper.rb:229:in `default_controller_and_action': missing :controller (ArgumentError)
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/actionpack-4.0.0/lib/action_dispatch/routing/mapper.rb:116:in `normalize_options!'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/actionpack-4.0.0/lib/action_dispatch/routing/mapper.rb:64:in `initialize'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/actionpack-4.0.0/lib/action_dispatch/routing/mapper.rb:1438:in `new'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/actionpack-4.0.0/lib/action_dispatch/routing/mapper.rb:1438:in `add_route'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/actionpack-4.0.0/lib/action_dispatch/routing/mapper.rb:1417:in `decomposed_match'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/actionpack-4.0.0/lib/action_dispatch/routing/mapper.rb:1398:in `block in match'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/actionpack-4.0.0/lib/action_dispatch/routing/mapper.rb:1389:in `each'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/actionpack-4.0.0/lib/action_dispatch/routing/mapper.rb:1389:in `match'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/actionpack-4.0.0/lib/action_dispatch/routing/mapper.rb:330:in `root'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/actionpack-4.0.0/lib/action_dispatch/routing/mapper.rb:1459:in `root'
from /home/p4/rails_tut/test_app/config/routes.rb:3:in `block in <top (required)>'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/actionpack-4.0.0/lib/action_dispatch/routing/route_set.rb:316:in `instance_exec'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/actionpack-4.0.0/lib/action_dispatch/routing/route_set.rb:316:in `eval_block'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/actionpack-4.0.0/lib/action_dispatch/routing/route_set.rb:294:in `draw'
from /home/p4/rails_tut/test_app/config/routes.rb:1:in `<top (required)>'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:222:in `load'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:222:in `block in load'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:213:in `load_dependency'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:222:in `load'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/routes_reloader.rb:40:in `block in load_paths'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/routes_reloader.rb:40:in `each'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/routes_reloader.rb:40:in `load_paths'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/routes_reloader.rb:16:in `reload!'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/routes_reloader.rb:26:in `block in updater'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/file_update_checker.rb:75:in `call'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/file_update_checker.rb:75:in `execute'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/routes_reloader.rb:27:in `updater'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/routes_reloader.rb:6:in `execute_if_updated'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/finisher.rb:69:in `block in <module:Finisher>'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/initializable.rb:30:in `instance_exec'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/initializable.rb:30:in `run'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/initializable.rb:55:in `block in run_initializers'
from /home/p4/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:150:in `block in tsort_each'
from /home/p4/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:183:in `block (2 levels) in each_strongly_connected_component'
from /home/p4/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:219:in `each_strongly_connected_component_from'
from /home/p4/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:182:in `block in each_strongly_connected_component'
from /home/p4/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:180:in `each'
from /home/p4/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:180:in `each_strongly_connected_component'
from /home/p4/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:148:in `tsort_each'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/initializable.rb:54:in `run_initializers'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application.rb:215:in `initialize!'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/railtie/configurable.rb:30:in `method_missing'
from /home/p4/rails_tut/test_app/config/environment.rb:5:in `<top (required)>'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `require'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `block in require'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:213:in `load_dependency'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `require'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application.rb:189:in `require_environment!'
from /home/p4/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/commands.rb:45:in `<top (required)>'
from bin/rails:4:in `require'
from bin/rails:4:in `<main>'
I have no idea what this the internal working of rails is as this error seem to be some problem coming from 'mapping.rb'.
The following it my routes.rb
TestApp::Application.routes.draw do
root 'dunbs' => 'dunbs#index'
end

Your syntax for defining a root route is incorrect, it should be either root to: 'dunbs#index' or root 'dunbs#index'.
See http://guides.rubyonrails.org/routing.html#using-root for more details.

Related

Devise error in basic setup stage

I have used Devise a million times, but I have never had this issue. I have placed the gem in my gem file. I did 'bundle install' then I typed ' rails generate devise:install' and I get this error:
/Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.2/lib/active_support/inflector/methods.rb:268:in `const_get': uninitialized constant User (NameError)
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.2/lib/active_support/inflector/methods.rb:268:in `block in constantize'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.2/lib/active_support/inflector/methods.rb:266:in `each'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.2/lib/active_support/inflector/methods.rb:266:in `inject'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.2/lib/active_support/inflector/methods.rb:266:in `constantize'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/devise-4.2.1/lib/devise.rb:305:in `get'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/devise-4.2.1/lib/devise/mapping.rb:81:in `to'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/devise-4.2.1/lib/devise/mapping.rb:76:in `modules'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/devise-4.2.1/lib/devise/mapping.rb:93:in `routes'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/devise-4.2.1/lib/devise/mapping.rb:160:in `default_used_route'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/devise-4.2.1/lib/devise/mapping.rb:70:in `initialize'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/devise-4.2.1/lib/devise.rb:335:in `new'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/devise-4.2.1/lib/devise.rb:335:in `add_mapping'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/devise-4.2.1/lib/devise/rails/routes.rb:241:in `block in devise_for'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/devise-4.2.1/lib/devise/rails/routes.rb:240:in `each'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/devise-4.2.1/lib/devise/rails/routes.rb:240:in `devise_for'
from /Users/johnseabolt/Desktop/2. Projects/ReactBlog/config/routes.rb:2:in `block in <top (required)>'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.2/lib/action_dispatch/routing/route_set.rb:389:in `instance_exec'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.2/lib/action_dispatch/routing/route_set.rb:389:in `eval_block'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.2/lib/action_dispatch/routing/route_set.rb:371:in `draw'
from /Users/johnseabolt/Desktop/2. Projects/ReactBlog/config/routes.rb:1:in `<top (required)>'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.0.2/lib/rails/application/routes_reloader.rb:40:in `block in load_paths'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.0.2/lib/rails/application/routes_reloader.rb:40:in `each'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.0.2/lib/rails/application/routes_reloader.rb:40:in `load_paths'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.0.2/lib/rails/application/routes_reloader.rb:16:in `reload!'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.0.2/lib/rails/application/routes_reloader.rb:26:in `block in updater'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.2/lib/active_support/file_update_checker.rb:77:in `execute'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.0.2/lib/rails/application/routes_reloader.rb:27:in `updater'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.0.2/lib/rails/application/routes_reloader.rb:7:in `execute_if_updated'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.0.2/lib/rails/application/finisher.rb:119:in `block in <module:Finisher>'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.0.2/lib/rails/initializable.rb:30:in `instance_exec'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.0.2/lib/rails/initializable.rb:30:in `run'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.0.2/lib/rails/initializable.rb:55:in `block in run_initializers'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:228:in `block in tsort_each'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:431:in `each_strongly_connected_component_from'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:349:in `block in each_strongly_connected_component'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:347:in `each'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:347:in `call'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:347:in `each_strongly_connected_component'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:226:in `tsort_each'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:205:in `tsort_each'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.0.2/lib/rails/initializable.rb:54:in `run_initializers'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.0.2/lib/rails/application.rb:352:in `initialize!'
from /Users/johnseabolt/Desktop/2. Projects/ReactBlog/config/environment.rb:5:in `<top (required)>'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-2.0.1/lib/spring/application.rb:92:in `preload'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-2.0.1/lib/spring/application.rb:143:in `serve'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-2.0.1/lib/spring/application.rb:131:in `block in run'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-2.0.1/lib/spring/application.rb:125:in `loop'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-2.0.1/lib/spring/application.rb:125:in `run'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-2.0.1/lib/spring/application/boot.rb:19:in `<top (required)>'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/site_ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/site_ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from -e:1:in `<main>'
I previously had gotten past this step, but I was turning around and trying it again. I had already run 'rails generate devise User,' but had received an error. If I run that same command again, I get this:
/Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.2/lib/active_support/inflector/methods.rb:268:in `const_get': uninitialized constant User (NameError)
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.2/lib/active_support/inflector/methods.rb:268:in `block in constantize'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.2/lib/active_support/inflector/methods.rb:266:in `each'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.2/lib/active_support/inflector/methods.rb:266:in `inject'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.2/lib/active_support/inflector/methods.rb:266:in `constantize'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/devise-4.2.1/lib/devise.rb:305:in `get'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/devise-4.2.1/lib/devise/mapping.rb:81:in `to'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/devise-4.2.1/lib/devise/mapping.rb:76:in `modules'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/devise-4.2.1/lib/devise/mapping.rb:93:in `routes'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/devise-4.2.1/lib/devise/mapping.rb:160:in `default_used_route'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/devise-4.2.1/lib/devise/mapping.rb:70:in `initialize'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/devise-4.2.1/lib/devise.rb:335:in `new'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/devise-4.2.1/lib/devise.rb:335:in `add_mapping'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/devise-4.2.1/lib/devise/rails/routes.rb:241:in `block in devise_for'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/devise-4.2.1/lib/devise/rails/routes.rb:240:in `each'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/devise-4.2.1/lib/devise/rails/routes.rb:240:in `devise_for'
from /Users/johnseabolt/Desktop/2. Projects/ReactBlog/config/routes.rb:2:in `block in <top (required)>'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.2/lib/action_dispatch/routing/route_set.rb:389:in `instance_exec'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.2/lib/action_dispatch/routing/route_set.rb:389:in `eval_block'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.2/lib/action_dispatch/routing/route_set.rb:371:in `draw'
from /Users/johnseabolt/Desktop/2. Projects/ReactBlog/config/routes.rb:1:in `<top (required)>'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.0.2/lib/rails/application/routes_reloader.rb:40:in `block in load_paths'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.0.2/lib/rails/application/routes_reloader.rb:40:in `each'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.0.2/lib/rails/application/routes_reloader.rb:40:in `load_paths'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.0.2/lib/rails/application/routes_reloader.rb:16:in `reload!'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.0.2/lib/rails/application/routes_reloader.rb:26:in `block in updater'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.2/lib/active_support/file_update_checker.rb:77:in `execute'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.0.2/lib/rails/application/routes_reloader.rb:27:in `updater'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.0.2/lib/rails/application/routes_reloader.rb:7:in `execute_if_updated'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.0.2/lib/rails/application/finisher.rb:119:in `block in <module:Finisher>'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.0.2/lib/rails/initializable.rb:30:in `instance_exec'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.0.2/lib/rails/initializable.rb:30:in `run'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.0.2/lib/rails/initializable.rb:55:in `block in run_initializers'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:228:in `block in tsort_each'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:431:in `each_strongly_connected_component_from'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:349:in `block in each_strongly_connected_component'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:347:in `each'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:347:in `call'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:347:in `each_strongly_connected_component'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:226:in `tsort_each'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:205:in `tsort_each'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.0.2/lib/rails/initializable.rb:54:in `run_initializers'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.0.2/lib/rails/application.rb:352:in `initialize!'
from /Users/johnseabolt/Desktop/2. Projects/ReactBlog/config/environment.rb:5:in `<top (required)>'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-2.0.1/lib/spring/application.rb:92:in `preload'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-2.0.1/lib/spring/application.rb:143:in `serve'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-2.0.1/lib/spring/application.rb:131:in `block in run'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-2.0.1/lib/spring/application.rb:125:in `loop'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-2.0.1/lib/spring/application.rb:125:in `run'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-2.0.1/lib/spring/application/boot.rb:19:in `<top (required)>'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/site_ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /Users/johnseabolt/.rbenv/versions/2.3.1/lib/ruby/site_ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from -e:1:in `<main>'
Can someone help? I can't seem to get past this basic setup stage.
Your error shows you added devise_for :user in routes.rb when you haven't set it up yet, as shown here:
from /Users/johnseabolt/Desktop/2. Projects/ReactBlog/config/routes.rb:2:in `<top (required)>'
Remove devise_for :user from routes.rb, run the install generator, then add devise_for :user again if it worked out.

how do I have an url in the below format

I am able to generate a url and associated web page with the help of the rails generate controller static_pages about. So the url would be something like this www.bla.com/static_pages/about'. Now I want to generate this urlbla.com/help` without the use of generate,
I added a route in routes.rb like this
get 'help'
Then I added an action in application_controller.rb like this
def hello
render text: "Hello"
end
Then when started the server, I get the following error
Exiting
/usr/local/rvm/gems/ruby-2.2.1/gems/actionpack-4.2.2/lib/action_dispatch/routing/mapper.rb:275:in `check_part': Missing :controller key on routes definition, please check your routes. (ArgumentError)
from /usr/local/rvm/gems/ruby-2.2.1/gems/actionpack-4.2.2/lib/action_dispatch/routing/mapper.rb:255:in `check_controller_and_action'
from /usr/local/rvm/gems/ruby-2.2.1/gems/actionpack-4.2.2/lib/action_dispatch/routing/mapper.rb:178:in `normalize_options!'
from /usr/local/rvm/gems/ruby-2.2.1/gems/actionpack-4.2.2/lib/action_dispatch/routing/mapper.rb:100:in `initialize'
from /usr/local/rvm/gems/ruby-2.2.1/gems/actionpack-4.2.2/lib/action_dispatch/routing/mapper.rb:78:in `new'
from /usr/local/rvm/gems/ruby-2.2.1/gems/actionpack-4.2.2/lib/action_dispatch/routing/mapper.rb:78:in `build'
from /usr/local/rvm/gems/ruby-2.2.1/gems/actionpack-4.2.2/lib/action_dispatch/routing/mapper.rb:1559:in `add_route'
from /usr/local/rvm/gems/ruby-2.2.1/gems/actionpack-4.2.2/lib/action_dispatch/routing/mapper.rb:1536:in `decomposed_match'
from /usr/local/rvm/gems/ruby-2.2.1/gems/actionpack-4.2.2/lib/action_dispatch/routing/mapper.rb:1517:in `block in match'
from /usr/local/rvm/gems/ruby-2.2.1/gems/actionpack-4.2.2/lib/action_dispatch/routing/mapper.rb:1507:in `each'
from /usr/local/rvm/gems/ruby-2.2.1/gems/actionpack-4.2.2/lib/action_dispatch/routing/mapper.rb:1507:in `match'
from /usr/local/rvm/gems/ruby-2.2.1/gems/actionpack-4.2.2/lib/action_dispatch/routing/mapper.rb:689:in `map_method'
from /usr/local/rvm/gems/ruby-2.2.1/gems/actionpack-4.2.2/lib/action_dispatch/routing/mapper.rb:650:in `get'
from /home/ubuntu/workspace/sample_app/config/routes.rb:12:in `block in <top (required)>'
from /usr/local/rvm/gems/ruby-2.2.1/gems/actionpack-4.2.2/lib/action_dispatch/routing/route_set.rb:432:in `instance_exec'
from /usr/local/rvm/gems/ruby-2.2.1/gems/actionpack-4.2.2/lib/action_dispatch/routing/route_set.rb:432:in `eval_block'
from /usr/local/rvm/gems/ruby-2.2.1/gems/actionpack-4.2.2/lib/action_dispatch/routing/route_set.rb:410:in `draw'
from /home/ubuntu/workspace/sample_app/config/routes.rb:1:in `<top (required)>'
from /usr/local/rvm/gems/ruby-2.2.1/gems/activesupport-4.2.2/lib/active_support/dependencies.rb:268:in `load'
from /usr/local/rvm/gems/ruby-2.2.1/gems/activesupport-4.2.2/lib/active_support/dependencies.rb:268:in `block in load'
from /usr/local/rvm/gems/ruby-2.2.1/gems/activesupport-4.2.2/lib/active_support/dependencies.rb:240:in `load_dependency'
from /usr/local/rvm/gems/ruby-2.2.1/gems/activesupport-4.2.2/lib/active_support/dependencies.rb:268:in `load'
from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.2/lib/rails/application/routes_reloader.rb:40:in `block in load_paths'
from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.2/lib/rails/application/routes_reloader.rb:40:in `each'
from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.2/lib/rails/application/routes_reloader.rb:40:in `load_paths'
from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.2/lib/rails/application/routes_reloader.rb:16:in `reload!'
from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.2/lib/rails/application/routes_reloader.rb:26:in `block in updater'
from /usr/local/rvm/gems/ruby-2.2.1/gems/activesupport-4.2.2/lib/active_support/file_update_checker.rb:75:in `call'
from /usr/local/rvm/gems/ruby-2.2.1/gems/activesupport-4.2.2/lib/active_support/file_update_checker.rb:75:in `execute'
from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.2/lib/rails/application/routes_reloader.rb:27:in `updater'
from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.2/lib/rails/application/routes_reloader.rb:7:in `execute_if_updated'
from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.2/lib/rails/application/finisher.rb:69:in `block in <module:Finisher>'
from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.2/lib/rails/initializable.rb:30:in `instance_exec'
from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.2/lib/rails/initializable.rb:30:in `run'
from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.2/lib/rails/initializable.rb:55:in `block in run_initializers'
from /usr/local/rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:226:in `block in tsort_each'
from /usr/local/rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:348:in `block (2 levels) in each_strongly_connected_component'
from /usr/local/rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:429:in `each_strongly_connected_component_from'
from /usr/local/rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:347:in `block in each_strongly_connected_component'
from /usr/local/rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:345:in `each'
from /usr/local/rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:345:in `call'
from /usr/local/rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:345:in `each_strongly_connected_component'
from /usr/local/rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:224:in `tsort_each'
from /usr/local/rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:203:in `tsort_each'
from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.2/lib/rails/initializable.rb:54:in `run_initializers'
from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.2/lib/rails/application.rb:352:in `initialize!'
from /home/ubuntu/workspace/sample_app/config/environment.rb:5:in `<top (required)>'
from /home/ubuntu/workspace/sample_app/config.ru:3:in `require'
from /home/ubuntu/workspace/sample_app/config.ru:3:in `block in <main>'
from /usr/local/rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/builder.rb:55:in `instance_eval'
from /usr/local/rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/builder.rb:55:in `initialize'
from /home/ubuntu/workspace/sample_app/config.ru:in `new'
from /home/ubuntu/workspace/sample_app/config.ru:in `<main>'
from /usr/local/rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/builder.rb:49:in `eval'
from /usr/local/rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/builder.rb:49:in `new_from_string'
from /usr/local/rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/builder.rb:40:in `parse_file'
from /usr/local/rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/server.rb:299:in `build_app_and_options_from_config'
from /usr/local/rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/server.rb:208:in `app'
from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.2/lib/rails/commands/server.rb:61:in `app'
from /usr/local/rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/server.rb:336:in `wrapped_app'
from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.2/lib/rails/commands/server.rb:139:in `log_to_stdout'
from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.2/lib/rails/commands/server.rb:78:in `start'
from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.2/lib/rails/commands/commands_tasks.rb:80:in `block in server'
from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.2/lib/rails/commands/commands_tasks.rb:75:in `tap'
from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.2/lib/rails/commands/commands_tasks.rb:75:in `server'
from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.2/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.2/lib/rails/commands.rb:17:in `<top (required)>'
from /home/ubuntu/workspace/sample_app/bin/rails:8:in `require'
from /home/ubuntu/workspace/sample_app/bin/rails:8:in `<top (required)>'
from /usr/local/rvm/gems/ruby-2.2.1/gems/spring-1.1.3/lib/spring/client/rails.rb:27:in `load'
from /usr/local/rvm/gems/ruby-2.2.1/gems/spring-1.1.3/lib/spring/client/rails.rb:27:in `call'
from /usr/local/rvm/gems/ruby-2.2.1/gems/spring-1.1.3/lib/spring/client/command.rb:7:in `call'
from /usr/local/rvm/gems/ruby-2.2.1/gems/spring-1.1.3/lib/spring/client.rb:26:in `run'
from /usr/local/rvm/gems/ruby-2.2.1/gems/spring-1.1.3/bin/spring:48:in `<top (required)>'
from /usr/local/rvm/gems/ruby-2.2.1/gems/spring-1.1.3/lib/spring/binstub.rb:11:in `load'
from /usr/local/rvm/gems/ruby-2.2.1/gems/spring-1.1.3/lib/spring/binstub.rb:11:in `<top (required)>'
from /home/ubuntu/workspace/sample_app/bin/spring:13:in `require'
from /home/ubuntu/workspace/sample_app/bin/spring:13:in `<top (required)>'
from bin/rails:3:in `load'
from bin/rails:3:in `<main>'
Missing :controller key on routes definition, please check your
routes. (ArgumentError)
As the error states, you need to specify controller and action matching to the route. The below should work.
get "help", to: 'static_pages#about', as: 'help'
^^^^^^ ^^^^
controller action
Also, I suggest you to follow these Guides for clear understanding on how to define the routes.

ruby gem devise could not generate initializer

I followed the steps on https://github.com/plataformatec/devise to install devise.
after bundle install
I tried to add initializer to my app config using:
rails generate devise:install
However, I keep getting this error:
undefined method `devise' for User (call 'User.connection' to establish a connection):Class (NoMethodError)
Stack trace:
/Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/activerecord-4.0.10/lib/active_record/dynamic_matchers.rb:22:in `method_missing': undefined method `devise' for User (call 'User.connection' to establish a connection):Class (NoMethodError)
from /Users/MyUsername/Documents/AppDev/Pinteresting/app/models/user.rb:4:in `<class:User>'
from /Users/MyUsername/Documents/AppDev/Pinteresting/app/models/user.rb:1:in `<top (required)>'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/activesupport-4.0.10/lib/active_support/dependencies.rb:424:in `load'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/activesupport-4.0.10/lib/active_support/dependencies.rb:424:in `block in load_file'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/activesupport-4.0.10/lib/active_support/dependencies.rb:616:in `new_constants_in'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/activesupport-4.0.10/lib/active_support/dependencies.rb:423:in `load_file'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/activesupport-4.0.10/lib/active_support/dependencies.rb:324:in `require_or_load'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/activesupport-4.0.10/lib/active_support/dependencies.rb:463:in `load_missing_constant'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/activesupport-4.0.10/lib/active_support/dependencies.rb:184:in `const_missing'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/activesupport-4.0.10/lib/active_support/inflector/methods.rb:226:in `const_get'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/activesupport-4.0.10/lib/active_support/inflector/methods.rb:226:in `block in constantize'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/activesupport-4.0.10/lib/active_support/inflector/methods.rb:224:in `each'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/activesupport-4.0.10/lib/active_support/inflector/methods.rb:224:in `inject'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/activesupport-4.0.10/lib/active_support/inflector/methods.rb:224:in `constantize'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/activesupport-4.0.10/lib/active_support/dependencies.rb:535:in `get'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/activesupport-4.0.10/lib/active_support/dependencies.rb:566:in `constantize'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/devise-3.4.0/lib/devise.rb:302:in `get'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/devise-3.4.0/lib/devise/mapping.rb:80:in `to'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/devise-3.4.0/lib/devise/mapping.rb:75:in `modules'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/devise-3.4.0/lib/devise/mapping.rb:92:in `routes'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/devise-3.4.0/lib/devise/mapping.rb:159:in `default_used_route'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/devise-3.4.0/lib/devise/mapping.rb:69:in `initialize'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/devise-3.4.0/lib/devise.rb:336:in `new'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/devise-3.4.0/lib/devise.rb:336:in `add_mapping'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/devise-3.4.0/lib/devise/rails/routes.rb:224:in `block in devise_for'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/devise-3.4.0/lib/devise/rails/routes.rb:223:in `each'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/devise-3.4.0/lib/devise/rails/routes.rb:223:in `devise_for'
from /Users/MyUsername/Documents/AppDev/Pinteresting/config/routes.rb:2:in `block in <top (required)>'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/actionpack-4.0.10/lib/action_dispatch/routing/route_set.rb:337:in `instance_exec'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/actionpack-4.0.10/lib/action_dispatch/routing/route_set.rb:337:in `eval_block'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/actionpack-4.0.10/lib/action_dispatch/routing/route_set.rb:315:in `draw'
from /Users/MyUsername/Documents/AppDev/Pinteresting/config/routes.rb:1:in `<top (required)>'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/activesupport-4.0.10/lib/active_support/dependencies.rb:223:in `load'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/activesupport-4.0.10/lib/active_support/dependencies.rb:223:in `block in load'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/activesupport-4.0.10/lib/active_support/dependencies.rb:214:in `load_dependency'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/activesupport-4.0.10/lib/active_support/dependencies.rb:223:in `load'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/railties-4.0.10/lib/rails/application/routes_reloader.rb:40:in `block in load_paths'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/railties-4.0.10/lib/rails/application/routes_reloader.rb:40:in `each'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/railties-4.0.10/lib/rails/application/routes_reloader.rb:40:in `load_paths'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/railties-4.0.10/lib/rails/application/routes_reloader.rb:16:in `reload!'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/railties-4.0.10/lib/rails/application/routes_reloader.rb:26:in `block in updater'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/activesupport-4.0.10/lib/active_support/file_update_checker.rb:75:in `call'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/activesupport-4.0.10/lib/active_support/file_update_checker.rb:75:in `execute'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/railties-4.0.10/lib/rails/application/routes_reloader.rb:27:in `updater'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/railties-4.0.10/lib/rails/application/routes_reloader.rb:6:in `execute_if_updated'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/railties-4.0.10/lib/rails/application/finisher.rb:69:in `block in <module:Finisher>'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/railties-4.0.10/lib/rails/initializable.rb:30:in `instance_exec'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/railties-4.0.10/lib/rails/initializable.rb:30:in `run'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/railties-4.0.10/lib/rails/initializable.rb:55:in `block in run_initializers'
from /Users/MyUsername/.rvm/rubies/ruby-2.0.0-p576/lib/ruby/2.0.0/tsort.rb:150:in `block in tsort_each'
from /Users/MyUsername/.rvm/rubies/ruby-2.0.0-p576/lib/ruby/2.0.0/tsort.rb:183:in `block (2 levels) in each_strongly_connected_component'
from /Users/MyUsername/.rvm/rubies/ruby-2.0.0-p576/lib/ruby/2.0.0/tsort.rb:219:in `each_strongly_connected_component_from'
from /Users/MyUsername/.rvm/rubies/ruby-2.0.0-p576/lib/ruby/2.0.0/tsort.rb:182:in `block in each_strongly_connected_component'
from /Users/MyUsername/.rvm/rubies/ruby-2.0.0-p576/lib/ruby/2.0.0/tsort.rb:180:in `each'
from /Users/MyUsername/.rvm/rubies/ruby-2.0.0-p576/lib/ruby/2.0.0/tsort.rb:180:in `each_strongly_connected_component'
from /Users/MyUsername/.rvm/rubies/ruby-2.0.0-p576/lib/ruby/2.0.0/tsort.rb:148:in `tsort_each'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/railties-4.0.10/lib/rails/initializable.rb:54:in `run_initializers'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/railties-4.0.10/lib/rails/application.rb:215:in `initialize!'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/railties-4.0.10/lib/rails/railtie/configurable.rb:30:in `method_missing'
from /Users/MyUsername/Documents/AppDev/Pinteresting/config/environment.rb:5:in `<top (required)>'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/activesupport-4.0.10/lib/active_support/dependencies.rb:229:in `require'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/activesupport-4.0.10/lib/active_support/dependencies.rb:229:in `block in require'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/activesupport-4.0.10/lib/active_support/dependencies.rb:214:in `load_dependency'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/activesupport-4.0.10/lib/active_support/dependencies.rb:229:in `require'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/railties-4.0.10/lib/rails/application.rb:189:in `require_environment!'
from /Users/MyUsername/.rvm/gems/ruby-2.0.0-p576/gems/railties-4.0.10/lib/rails/commands.rb:44:in `<top (required)>'
from bin/rails:4:in `require'
from bin/rails:4:in `<main>'
Okay, I figured out the problem. I guess because I previous installed devise and tried to reinstall a new version. However, devise automatically created some models for the app. I deleted those created folders/files and rerun rails generate devise:install and it worked.

What does this Devise error mean?

When I try to run my rails server I get the following error (Important note: I have just pulled my code from Github to Nitrous.Io, and was starting to work on the application):
/home/action/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/inflector/methods.rb:226:in `const_get': uninitialized constant User (NameEr
ror) from /home/action/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/inflector/methods.rb:226:in `block in constantize'
from /home/action/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/inflector/methods.rb:224:in `each'
from /home/action/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/inflector/methods.rb:224:in `inject'
from /home/action/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/inflector/methods.rb:224:in `constantize'
from /home/action/.rvm/gems/ruby-2.0.0-p247/gems/devise-3.1.1/lib/devise.rb:285:in `get'
from /home/action/.rvm/gems/ruby-2.0.0-p247/gems/devise-3.1.1/lib/devise/mapping.rb:77:in `to'
from /home/action/.rvm/gems/ruby-2.0.0-p247/gems/devise-3.1.1/lib/devise/mapping.rb:72:in `modules'
from /home/action/.rvm/gems/ruby-2.0.0-p247/gems/devise-3.1.1/lib/devise/mapping.rb:89:in `routes'
from /home/action/.rvm/gems/ruby-2.0.0-p247/gems/devise-3.1.1/lib/devise/mapping.rb:156:in `default_used_route'
from /home/action/.rvm/gems/ruby-2.0.0-p247/gems/devise-3.1.1/lib/devise/mapping.rb:66:in `initialize'
from /home/action/.rvm/gems/ruby-2.0.0-p247/gems/devise-3.1.1/lib/devise.rb:319:in `new'
from /home/action/.rvm/gems/ruby-2.0.0-p247/gems/devise-3.1.1/lib/devise.rb:319:in `add_mapping'
from /home/action/.rvm/gems/ruby-2.0.0-p247/gems/devise-3.1.1/lib/devise/rails/routes.rb:210:in `block in devise_for'
from /home/action/.rvm/gems/ruby-2.0.0-p247/gems/devise-3.1.1/lib/devise/rails/routes.rb:209:in `each'
from /home/action/.rvm/gems/ruby-2.0.0-p247/gems/devise-3.1.1/lib/devise/rails/routes.rb:209:in `devise_for'
from /home/action/pinteresting/config/routes.rb:4:in `block in <top (required)>'
from /home/action/.rvm/gems/ruby-2.0.0-p247/gems/actionpack-4.0.0/lib/action_dispatch/routing/route_set.rb:316:in `instance_exec'
from /home/action/.rvm/gems/ruby-2.0.0-p247/gems/actionpack-4.0.0/lib/action_dispatch/routing/route_set.rb:316:in `eval_block'
from /home/action/.rvm/gems/ruby-2.0.0-p247/gems/actionpack-4.0.0/lib/action_dispatch/routing/route_set.rb:294:in `draw'
from /home/action/pinteresting/config/routes.rb:1:in `<top (required)>'
from /home/action/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/routes_reloader.rb:40:in `block in load_paths'
from /home/action/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/routes_reloader.rb:40:in `each'
from /home/action/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/routes_reloader.rb:40:in `load_paths'
from /home/action/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/routes_reloader.rb:16:in `reload!'
from /home/action/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/routes_reloader.rb:26:in `block in updater'
from /home/action/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/file_update_checker.rb:75:in `call'
from /home/action/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/file_update_checker.rb:75:in `execute'
from /home/action/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/routes_reloader.rb:27:in `updater'
from /home/action/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/routes_reloader.rb:6:in `execute_if_updated'
from /home/action/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/finisher.rb:69:in `block in <module:Finisher>'
from /home/action/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/initializable.rb:30:in `instance_exec'
from /home/action/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/initializable.rb:30:in `run'
from /home/action/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/initializable.rb:55:in `block in run_initializers'
from /home/action/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:150:in `block in tsort_each'
from /home/action/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:183:in `block (2 levels) in each_strongly_connected_component'
from /home/action/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:219:in `each_strongly_connected_component_from'
from /home/action/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:182:in `block in each_strongly_connected_component'
from /home/action/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:180:in `each'
from /home/action/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:180:in `each_strongly_connected_component'
from /home/action/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:148:in `tsort_each'
from /home/action/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/initializable.rb:54:in `run_initializers'
from /home/action/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application.rb:215:in `initialize!'
from /home/action/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/railtie/configurable.rb:30:in `method_missing'
from /home/action/pinteresting/config/environment.rb:5:in `<top (required)>'
from /home/action/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application.rb:189:in `require_environment!'
from /home/action/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/commands.rb:45:in `<top (required)>'
from bin/rails:4:in `require'
from bin/rails:4:in `<main>'
Looks like your database hasn't yet been created.
The most likely solution would be to run rake db:migrate if you're using sqlite, though if you're using Postgres or Mysql on Nitrous, you'll need to install them first. There is a guide to what's available here http://help.nitrous.io/categories/databases/

Rails: error installing backbone-on-rails gem

I included 'backbone-on-rails' in my Gemfile, did bundle install, and then did
rails generate backbone:install --javascript
And I got the error below. I'm using rails 3.2.8 and ruby 193. Can anyone explain what the problem might be?
If I can't get the gem to work, does anyone know where I should include _underscore and backbone in a Rails application?
/Users/michael/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/actionpack-3.2.8/lib/action_dispatch/routing/mapper.rb:181:in `default_controller_and_action': missing :controller (ArgumentError)
from /Users/michael/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/actionpack-3.2.8/lib/action_dispatch/routing/mapper.rb:78:in `normalize_options!'
from /Users/michael/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/actionpack-3.2.8/lib/action_dispatch/routing/mapper.rb:61:in `initialize'
from /Users/michael/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/actionpack-3.2.8/lib/action_dispatch/routing/mapper.rb:1304:in `new'
from /Users/michael/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/actionpack-3.2.8/lib/action_dispatch/routing/mapper.rb:1304:in `add_route'
from /Users/michael/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/actionpack-3.2.8/lib/action_dispatch/routing/mapper.rb:1284:in `decomposed_match'
from /Users/michael/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/actionpack-3.2.8/lib/action_dispatch/routing/mapper.rb:1270:in `block in match'
from /Users/michael/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/actionpack-3.2.8/lib/action_dispatch/routing/mapper.rb:1270:in `each'
from /Users/michael/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/actionpack-3.2.8/lib/action_dispatch/routing/mapper.rb:1270:in `match'
from /Users/michael/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/actionpack-3.2.8/lib/action_dispatch/routing/mapper.rb:507:in `map_method'
from /Users/michael/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/actionpack-3.2.8/lib/action_dispatch/routing/mapper.rb:469:in `get'
from /Users/michael/Sites/backy/config/routes.rb:2:in `block in <top (required)>'
from /Users/michael/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/actionpack-3.2.8/lib/action_dispatch/routing/route_set.rb:282:in `instance_exec'
from /Users/michael/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/actionpack-3.2.8/lib/action_dispatch/routing/route_set.rb:282:in `eval_block'
from /Users/michael/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/actionpack-3.2.8/lib/action_dispatch/routing/route_set.rb:260:in `draw'
from /Users/michael/Sites/backy/config/routes.rb:1:in `<top (required)>'
from /Users/michaeljohnmitchell/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/activesupport-3.2.8/lib/active_support/dependencies.rb:245:in `load'
from /Users/michael/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/activesupport-3.2.8/lib/active_support/dependencies.rb:245:in `block in load'
from /Users/michael/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/activesupport-3.2.8/lib/active_support/dependencies.rb:236:in `load_dependency'
from /Users/michaeljohnmitchell/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/activesupport-3.2.8/lib/active_support/dependencies.rb:245:in `load'
from /Users/michael/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/railties-3.2.8/lib/rails/application/routes_reloader.rb:40:in `block in load_paths'
from /Users/michael/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/railties-3.2.8/lib/rails/application/routes_reloader.rb:40:in `each'
from /Users/michaeljohnmitchell/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/railties-3.2.8/lib/rails/application/routes_reloader.rb:40:in `load_paths'
from /Users/michael/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/railties-3.2.8/lib/rails/application/routes_reloader.rb:16:in `reload!'
from /Users/michael/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/railties-3.2.8/lib/rails/application/routes_reloader.rb:26:in `block in updater'
from /Users/michael/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/activesupport-3.2.8/lib/active_support/file_update_checker.rb:78:in `call'
from /Users/michael/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/activesupport-3.2.8/lib/active_support/file_update_checker.rb:78:in `execute'
from /Users/michael/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/railties-3.2.8/lib/rails/application/routes_reloader.rb:27:in `updater'
from /Users/michael/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/railties-3.2.8/lib/rails/application/routes_reloader.rb:7:in `execute_if_updated'
from /Users/michael/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/railties-3.2.8/lib/rails/application/finisher.rb:66:in `block in <module:Finisher>'
from /Users/michael/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/railties-3.2.8/lib/rails/initializable.rb:30:in `instance_exec'
from /Users/michael/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/railties-3.2.8/lib/rails/initializable.rb:30:in `run'
from /Users/michael/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/railties-3.2.8/lib/rails/initializable.rb:55:in `block in run_initializers'
from /Users/michael/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/railties-3.2.8/lib/rails/initializable.rb:54:in `each'
from /Users/michael/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/railties-3.2.8/lib/rails/initializable.rb:54:in `run_initializers'
from /Users/michael/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/railties-3.2.8/lib/rails/application.rb:136:in `initialize!'
from /Users/michael/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/railties-3.2.8/lib/rails/railtie/configurable.rb:30:in `method_missing'
from /Users/michael/Sites/backy/config/environment.rb:5:in `<top (required)>'
from /Users/michael/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/railties-3.2.8/lib/rails/application.rb:103:in `require'
from /Users/michael/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/railties-3.2.8/lib/rails/application.rb:103:in `require_environment!'
from /Users/michael/.rvm/gems/ruby-1.9.3-rc1#ruby193/gems/railties-3.2.8/lib/rails/commands.rb:25:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'
It had nothing to do with backbone-on-rails. I had an error in the route that was defined in routes.rb

Resources