rake migration aborted: ошибка с неинициализированной константой и именованием миграции

Question

Я искал через stackoverflow и не вижу подобной проблемы. Я пытаюсь добавить один столбец в существующую таблицу Slicks. Должно быть достаточно легко, но я вытаскиваю свои волосы! я бы не назвал рельсы команды для миграции достаточно хорошо: рельсы генерировать имя миграции AddNametoSlicks: строка

также: 1.) эта команда сгенерирована миграции 20130605194117_add_nameto_slicks.rb , не смотреть прямо без _. Я изменил имя перехода на add_name_to_slicks.rb

2.) Команда миграции не сгенерировала add_column. Что мне не хватает в команде?

Вот файл миграции:

class AddNametoSlicks < ActiveRecord::Migration 
    def change 
    add_column :slicks, :name, :string 
    end 
end 

Ошибка из терминала:

rake aborted! 
An error has occurred, this and all later migrations canceled: 

uninitialized constant AddNameToSlicks/usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activesupport-3.2.12/lib/active_su 
pport/inflector/methods.rb:230:in `block in constantize' 
/usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activesupport-3.2.12/lib/active_support/inflector/methods.rb:229:in `eac 
h' 
/usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activesupport-3.2.12/lib/active_support/inflector/methods.rb:229:in `con 
stantize' 
/usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activesupport-3.2.12/lib/active_support/core_ext/string/inflections.rb:5 
4:in `constantize' 
/usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activerecord-3.2.12/lib/active_record/migration.rb:538:in `load_migratio 
n' 
/usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activerecord-3.2.12/lib/active_record/migration.rb:533:in `migration' 
/usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activerecord-3.2.12/lib/active_record/migration.rb:528:in `migrate' 
/usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activerecord-3.2.12/lib/active_record/migration.rb:720:in `block (2 leve 
ls) in migrate' 
/usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activerecord-3.2.12/lib/active_record/migration.rb:775:in `call' 
/usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activerecord-3.2.12/lib/active_record/migration.rb:775:in `block in ddl_ 
transaction' 
/usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activerecord-3.2.12/lib/active_record/connection_adapters/abstract/datab 
ase_statements.rb:192:in `transaction' 
/usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activerecord-3.2.12/lib/active_record/transactions.rb:208:in `transactio 
n' 
/usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activerecord-3.2.12/lib/active_record/migration.rb:775:in `ddl_transacti 
on' 
/usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activerecord-3.2.12/lib/active_record/migration.rb:719:in `block in migr 
ate' 
/usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activerecord-3.2.12/lib/active_record/migration.rb:700:in `each' 
/usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activerecord-3.2.12/lib/active_record/migration.rb:700:in `migrate' 
/usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activerecord-3.2.12/lib/active_record/migration.rb:570:in `up' 
/usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activerecord-3.2.12/lib/active_record/migration.rb:551:in `migrate' 
/usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activerecord-3.2.12/lib/active_record/railties/databases.rake:179:in `bl 
ock (2 levels) in <top (required)>' 
/usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/rake-10.0.4/lib/rake/task.rb:246:in `call' 
/usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/rake-10.0.4/lib/rake/task.rb:246:in `block in execute' 
/usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/rake-10.0.4/lib/rake/task.rb:241:in `each' 
/usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/rake-10.0.4/lib/rake/task.rb:241:in `execute' 
/usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/rake-10.0.4/lib/rake/task.rb:184:in `block in invoke_with_call_chain' 
/usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/rake-10.0.4/lib/rake/task.rb:177:in `invoke_with_call_chain' 
/usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/rake-10.0.4/lib/rake/task.rb:170:in `invoke' 
/usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/rake-10.0.4/lib/rake/application.rb:143:in `invoke_task' 
/usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/rake-10.0.4/lib/rake/application.rb:101:in `block (2 levels) in top_leve 
l' 
/usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/rake-10.0.4/lib/rake/application.rb:101:in `each' 
/usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/rake-10.0.4/lib/rake/application.rb:101:in `block in top_level' 
/usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/rake-10.0.4/lib/rake/application.rb:110:in `run_with_threads' 
/usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/rake-10.0.4/lib/rake/application.rb:95:in `top_level' 
/usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/rake-10.0.4/lib/rake/application.rb:73:in `block in run' 
/usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/rake-10.0.4/lib/rake/application.rb:160:in `standard_exception_handling' 
/usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/rake-10.0.4/lib/rake/application.rb:70:in `run' 
Tasks: TOP => db:migrate 

Answer 1

AddNameToSlicks запрашивается, но у вас есть AddNametoSlicks.

Изменить на - до