ruby ​​gem devise не смог создать инициализатор

Question

Я выполнил шаги на https://github.com/plataformatec/devise, чтобы установить devise.
после bundle install
Я пытался добавить инициализатор в мое приложение конфигурации с помощью: rails generate devise:install

Однако, я получаю эту ошибку:

undefined method `devise' for User (call 'User.connection' to establish a connection):Class (NoMethodError)

Стек след:

/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>' 

Answer 1

Хорошо, Я понял проблему. Наверное, потому, что я ранее устанавливал программу и пытался переустановить новую версию. Однако при разработке автоматически создаются некоторые модели приложения. Я удалил созданные папки/файлы и перезапустил rails generate devise:intall, и он сработал.