Ruby on rails 哈罗库：雷克中止了

我正在尝试在Heroku上运行db:migrate（应用程序在本地运行良好），但出现以下错误：

rake aborted!
uninitialized constant Bootstrap::Rails::Engine::Sass
/app/vendor/bundle/ruby/2.0.0/bundler/gems/bootstrap-rails-8eb1287f94b3/lib/bootstrap-rails/engine.rb:6:in `block in <class:Engine>'
/app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/initializable.rb:30:in `instance_exec'
/app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/initializable.rb:30:in `run'
/app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/initializable.rb:55:in `block in run_initializers'
/app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/initializable.rb:54:in `run_initializers'
/app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/application.rb:215:in `initialize!'
/app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/railtie/configurable.rb:30:in `method_missing'
/app/config/environment.rb:5:in `<top (required)>'
/app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/application.rb:189:in `require_environment!'
/app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/application.rb:249:in `block in run_tasks_blocks'
Tasks: TOP => db:migrate => environment
(See full trace by running task with --trace)

---

删除资产组，因为它不再存在于Rails4中

只需将其中包含的宝石移动到全球空间即可

# Gems used only for assets and not required
# in production environments by default.
group :assets do
  gem 'sass-rails'
  gem 'coffee-rails'

  # See https://github.com/sstephenson/execjs#readme for more supported runtimes
  # gem 'therubyracer', :platforms => :ruby
  #gem 'therubyracer'
  #gem 'less-rails'
  #gem 'twitter-bootstrap-rails'
  gem 'uglifier', '>= 1.0.3'
end

# becomes

# group :assets do
  gem 'sass-rails'
  gem 'coffee-rails'

  # See https://github.com/sstephenson/execjs#readme for more supported runtimes
  # gem 'therubyracer', :platforms => :ruby
  #gem 'therubyracer'
  #gem 'less-rails'
  #gem 'twitter-bootstrap-rails'
  gem 'uglifier', '>= 1.0.3'
# end

---

“你能出示你的档案吗？”SachinSingh补充道，“谢谢，我不知道。”。

# Gems used only for assets and not required
# in production environments by default.
group :assets do
  gem 'sass-rails'
  gem 'coffee-rails'

  # See https://github.com/sstephenson/execjs#readme for more supported runtimes
  # gem 'therubyracer', :platforms => :ruby
  #gem 'therubyracer'
  #gem 'less-rails'
  #gem 'twitter-bootstrap-rails'
  gem 'uglifier', '>= 1.0.3'
end

# becomes

# group :assets do
  gem 'sass-rails'
  gem 'coffee-rails'

  # See https://github.com/sstephenson/execjs#readme for more supported runtimes
  # gem 'therubyracer', :platforms => :ruby
  #gem 'therubyracer'
  #gem 'less-rails'
  #gem 'twitter-bootstrap-rails'
  gem 'uglifier', '>= 1.0.3'
# end