【问题标题】：How can I solve twitter-bootstrap error from ROR如何解决来自 ROR 的 twitter-bootstrap 错误
【发布时间】：2015-02-24 19:43:09
【问题描述】：

您好，谁能帮我解决来自 Ruby on Rails 的以下错误。

错误：

C:/Site/bootstrap/config/application.rb:13:in `<module:Bootstrap>': uninitialize
d constant Bootstrap::Rails::Application (NameError)

我在我的 gem 文件中添加了“gem 'bootstrap-sass', '~> 3.1.1.1'”并运行 bundle install。当我输入命令 rails g controller users 时，它给了我上述错误。我正在使用rails version 3.2.19 and ruby version 1.9.3.我的gem文件如下。

宝石文件

source 'https://rubygems.org'

gem 'rails', '3.2.19'

# Bundle edge Rails instead:
# gem 'rails', :git => 'git://github.com/rails/rails.git'

gem 'sqlite3'


# Gems used only for assets and not required
# in production environments by default.
group :assets do
  gem 'sass-rails',   '~> 3.2.3'
  gem 'coffee-rails', '~> 3.2.1'

  # See https://github.com/sstephenson/execjs#readme for more supported runtimes
  # gem 'therubyracer', :platforms => :ruby

  gem 'uglifier', '>= 1.0.3'
end

gem 'jquery-rails'

# To use ActiveModel has_secure_password
# gem 'bcrypt-ruby', '~> 3.0.0'

# To use Jbuilder templates for JSON
# gem 'jbuilder'

# Use unicorn as the app server
# gem 'unicorn'

# Deploy with Capistrano
# gem 'capistrano'

# To use debugger
# gem 'debugger'
gem 'bootstrap-sass', '~> 3.1.1.1'

config/application.rb

require File.expand_path('../boot', __FILE__)

require 'rails/all'

if defined?(Bundler)
  # If you precompile assets before deploying to production, use this line
  Bundler.require(*Rails.groups(:assets => %w(development test)))
  # If you want your assets lazily compiled in production, use this line
  # Bundler.require(:default, :assets, Rails.env)
end

module Bootstrap
  class Application < Rails::Application
    # Settings in config/environments/* take precedence over those specified here.
    # Application configuration should go into files in config/initializers
    # -- all .rb files in that directory are automatically loaded.

    # Custom directories with classes and modules you want to be autoloadable.
    # config.autoload_paths += %W(#{config.root}/extras)

    # Only load the plugins named here, in the order given (default is alphabetical).
    # :all can be used as a placeholder for all plugins not explicitly named.
    # config.plugins = [ :exception_notification, :ssl_requirement, :all ]

    # Activate observers that should always be running.
    # config.active_record.observers = :cacher, :garbage_collector, :forum_observer

    # Set Time.zone default to the specified zone and make Active Record auto-convert to this zone.
    # Run "rake -D time" for a list of tasks for finding time zone names. Default is UTC.
    # config.time_zone = 'Central Time (US & Canada)'

    # The default locale is :en and all translations from config/locales/*.rb,yml are auto loaded.
    # config.i18n.load_path += Dir[Rails.root.join('my', 'locales', '*.{rb,yml}').to_s]
    # config.i18n.default_locale = :de

    # Configure the default encoding used in templates for Ruby 1.9.
    config.encoding = "utf-8"

    # Configure sensitive parameters which will be filtered from the log file.
    config.filter_parameters += [:password]

    # Enable escaping HTML in JSON.
    config.active_support.escape_html_entities_in_json = true

    # Use SQL instead of Active Record's schema dumper when creating the database.
    # This is necessary if your schema can't be completely dumped by the schema dumper,
    # like if you have constraints or database-specific column types
    # config.active_record.schema_format = :sql

    # Enforce whitelist mode for mass assignment.
    # This will create an empty whitelist of attributes available for mass-assignment for all models
    # in your app. As such, your models will need to explicitly whitelist or blacklist accessible
    # parameters by using an attr_accessible or attr_protected declaration.
    config.active_record.whitelist_attributes = true

    # Enable the asset pipeline
    config.assets.enabled = true

    # Version of your assets, change this if you want to expire all your assets
    config.assets.version = '1.0'
  end
end

请帮帮我。

【问题讨论】：

标签： ruby ruby-on-rails-3 twitter-bootstrap

【解决方案1】：

您需要将应用程序从 Bootstrap 重命名为其他名称，因为它与 bootstrap-sass gem 冲突

【讨论】：

【解决方案2】：

看起来问题出在您的项目名称中......不幸的是，因为您的应用程序被称为 Bootstrap（您可以在第 12 行的 config/application.rb 中看到它，其中定义了模块 Bootstrap），并且在gem 源，另一个模块 Bootstrap 被创建（在这里查看：https://github.com/twbs/bootstrap-sass/blob/master/lib/bootstrap-sass.rb#L2）。这可能会给 Ruby 带来麻烦。

尝试生成新的 Rails 应用，但给它起不同的名字，比如

rails new bootstrap_playground

名称冲突应该没有任何问题。

希望有帮助！

【讨论】：