Как удалить разработанную модель с рельсов?

Question

rails aborted!
NameError: uninitialized constant Viewa
/home/pedro/.rvm/gems/ruby-2.4.1/gems/activesupport-5.0.7/lib/active_support/inflector/methods.rb:268:in `const_get'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/activesupport-5.0.7/lib/active_support/inflector/methods.rb:268:in `block in constantize'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/activesupport-5.0.7/lib/active_support/inflector/methods.rb:266:in `each'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/activesupport-5.0.7/lib/active_support/inflector/methods.rb:266:in `inject'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/activesupport-5.0.7/lib/active_support/inflector/methods.rb:266:in `constantize'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/devise-4.5.0/lib/devise.rb:316:in `get'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/devise-4.5.0/lib/devise/mapping.rb:83:in `to'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/devise-4.5.0/lib/devise/mapping.rb:78:in `modules'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/devise-4.5.0/lib/devise/mapping.rb:95:in `routes'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/devise-4.5.0/lib/devise/mapping.rb:162:in `default_used_route'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/devise-4.5.0/lib/devise/mapping.rb:72:in `initialize'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/devise-4.5.0/lib/devise.rb:346:in `new'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/devise-4.5.0/lib/devise.rb:346:in `add_mapping'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/devise-4.5.0/lib/devise/rails/routes.rb:243:in `block in devise_for'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/devise-4.5.0/lib/devise/rails/routes.rb:242:in `each'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/devise-4.5.0/lib/devise/rails/routes.rb:242:in `devise_for'
/home/pedro/Desktop/Ruby_projects/twitter/config/routes.rb:2:in `block in <top (required)>'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/actionpack-5.0.7/lib/action_dispatch/routing/route_set.rb:391:in `instance_exec'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/actionpack-5.0.7/lib/action_dispatch/routing/route_set.rb:391:in `eval_block'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/actionpack-5.0.7/lib/action_dispatch/routing/route_set.rb:373:in `draw'
/home/pedro/Desktop/Ruby_projects/twitter/config/routes.rb:1:in `<top (required)>'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/railties-5.0.7/lib/rails/application/routes_reloader.rb:40:in `block in load_paths'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/railties-5.0.7/lib/rails/application/routes_reloader.rb:40:in `each'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/railties-5.0.7/lib/rails/application/routes_reloader.rb:40:in `load_paths'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/railties-5.0.7/lib/rails/application/routes_reloader.rb:16:in `reload!'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/railties-5.0.7/lib/rails/application/routes_reloader.rb:26:in `block in updater'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/activesupport-5.0.7/lib/active_support/file_update_checker.rb:77:in `execute'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/railties-5.0.7/lib/rails/application/routes_reloader.rb:27:in `updater'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/railties-5.0.7/lib/rails/application/routes_reloader.rb:7:in `execute_if_updated'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/railties-5.0.7/lib/rails/application/finisher.rb:119:in `block in <module:Finisher>'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/railties-5.0.7/lib/rails/initializable.rb:30:in `instance_exec'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/railties-5.0.7/lib/rails/initializable.rb:30:in `run'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/railties-5.0.7/lib/rails/initializable.rb:55:in `block in run_initializers'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/railties-5.0.7/lib/rails/initializable.rb:54:in `run_initializers'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/railties-5.0.7/lib/rails/application.rb:352:in `initialize!'
/home/pedro/Desktop/Ruby_projects/twitter/config/environment.rb:5:in `<top (required)>'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/railties-5.0.7/lib/rails/application.rb:328:in `require_environment!'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/railties-5.0.7/lib/rails/application.rb:448:in `block in run_tasks_blocks'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/railties-5.0.7/lib/rails/commands/rake_proxy.rb:14:in `block in run_rake_task'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/railties-5.0.7/lib/rails/commands/rake_proxy.rb:11:in `run_rake_task'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/railties-5.0.7/lib/rails/commands/commands_tasks.rb:51:in `run_command!'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/railties-5.0.7/lib/rails/commands.rb:18:in `<top (required)>'
/home/pedro/Desktop/Ruby_projects/twitter/bin/rails:9:in `require'
/home/pedro/Desktop/Ruby_projects/twitter/bin/rails:9:in `<top (required)>'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/spring-2.0.2/lib/spring/client/rails.rb:28:in `load'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/spring-2.0.2/lib/spring/client/rails.rb:28:in `call'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/spring-2.0.2/lib/spring/client/command.rb:7:in `call'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/spring-2.0.2/lib/spring/client.rb:30:in `run'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/spring-2.0.2/bin/spring:49:in `<top (required)>'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/spring-2.0.2/lib/spring/binstub.rb:31:in `load'
/home/pedro/.rvm/gems/ruby-2.4.1/gems/spring-2.0.2/lib/spring/binstub.rb:31:in `<top (required)>'
/home/pedro/Desktop/Ruby_projects/twitter/bin/spring:15:in `require'
/home/pedro/Desktop/Ruby_projects/twitter/bin/spring:15:in `<top (required)>'
bin/rails:3:in `load'
bin/rails:3:in `<main>'
Tasks: TOP => db:migrate => environment
(See full trace by running task with --trace)

Я случайно создал модель устройства под названием "viewa" и попытался удалить ее с помощью команды "rails destroy модели viewa", но теперь я не могу выполнить миграцию, пожалуйста, помогите

Answer 1

Что сказал Тарек.

Другой вариант, если вы используете Git - просто запустить git reset --hard, чтобы очистить ваше рабочее дерево. Используйте это только в том случае, если вас не волнуют сделанные вами изменения.

Answer 2

Вы пытались удалить модель с помощью генератора devise ?

$rails destroy devise Viewa

Answer 3

В вашем config/routes.rb, где есть ссылка на device_for, удалите его. Это должно исправить эту ошибку.

Когда вы запустите генератор devise, он сгенерирует некоторый код в ваш файл config/routes.rb, как вы можете видеть здесь:

https://github.com/plataformatec/devise/blob/master/lib/generators/devise/devise_generator.rb#L21