Rails服務器錯誤：“找不到RubyGem rails（> = 0）（Gem :: LoadError）”

Question

我遇到的最困難的錯誤-希望大家幫忙！ （仍然是學習者和初學者）。

我曾嘗試過在Heroku上進行部署，但現在我的應用程序無法在Heroku和本地上運行。

現在嘗試僅解決本地情況。

我更改的其他內容是database.yml文件。 現在，它全部使用postgresql，但是在我的GemFile中，我指定了sqlite3進行測試。

rails s
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rubygems.rb:777:in `report_activate_error': Could not find RubyGem rails (>= 0) (Gem::LoadError)
    from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rubygems.rb:211:in `activate'
    from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rubygems.rb:1056:in `gem'
    from /usr/bin/rails:18

我的Gemfile：

source 'https://rubygems.org'

#ruby '2.0.0'

gem 'rails', '3.2.3'

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

group :development, :test do
    gem 'sqlite3'
end

group :production do
    gem 'pg'
end


# 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', :platform => :ruby

  gem 'uglifier', '>= 1.0.3'
end

gem 'jquery-rails'

gem 'paperclip'

跑bundle install並收到以下消息（我是否需要從此消息中做任何事情？）：

根據您的ruby版本，您可能需要安裝ruby rdoc / ri數據：

Your bundle is complete!
Use `bundle show [gemname]` to see where a bundled gem is installed.
Post-install message from rdoc:
<= 1.8.6 : unsupported
 = 1.8.7 : gem install rdoc-data; rdoc-data --install
 = 1.9.1 : gem install rdoc-data; rdoc-data --install
>= 1.9.2 : nothing to do! Yay!
Post-install message from paperclip:
##################################################
#  NOTE FOR UPGRADING FROM PRE-3.0 VERSION       #
##################################################

Paperclip 3.0 introduces a non-backward compatible change in your attachment
path. This will help to prevent attachment name clashes when you have
multiple attachments with the same name. If you didn't alter your
attachment's path and are using Paperclip's default, you'll have to add
`:path` and `:url` to your `has_attached_file` definition. For example:

    has_attached_file :avatar,
      :path => ":rails_root/public/system/:attachment/:id/:style/:filename",
      :url => "/system/:attachment/:id/:style/:filename"

Answer 1

而不是跑步

rails s

跑

bundle exec rails s

確保您使用的是Gemfile中引用的gem，而不是本地gem。