無法在捆綁更新導軌上找到適用於gem「activemodel」的兼容版本

我弄壞了我的應用程序嘗試更新到rails 4，現在不知道該怎麼辦，有人可以幫忙 - 謝謝！我能做些什麼來讓我所有的寶石回到他們應該的版本？無法在捆綁更新導軌上找到適用於gem「activemodel」的兼容版本

我的錯誤：

C:\sites\code\OM Rails\omrails>bundle update rails 
    Fetching gem metadata from https://rubygems.org/........ 
    Fetching gem metadata from https://rubygems.org/.. 
    Resolving dependencies... 
    Bundler could not find compatible versions for gem "activemodel": 
    In Gemfile: 
     simple_form (>= 0) x86-mingw32 depends on 
      activemodel (~> 3.0) x86-mingw32 

     rails (= 4.0.0.rc1) x86-mingw32 depends on 
      activemodel (4.0.0.rc1)

的Gemfile：

source 'https://rubygems.org' 

gem "activerecord" 
gem 'rails' , '4.0.0.rc1' 
gem "jquery-rails" 
gem "devise" 
gem 'simple_form' 
gem "paperclip" 
gem 'aws-sdk' 
gem 'will_paginate' 
gem 'bootstrap-will_paginate' 
gem 'thumbs_up' 
gem 'activeadmin' 
gem "meta_search"  
gem 'acts-as-taggable-on' 
gem 'postmark-rails' 
gem "railties" 

group :production do 
    gem 'pg' 
end 

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

group :assets do 
    gem 'sass-rails', '4.0.0.rc1' 
    gem 'coffee-rails', '4.0.0' 
    gem 'bootstrap-sass', '~> 2.3.2.1' 
    gem 'uglifier', '>= 1.0.3' 
end 

gem "mocha", :group => :test

來源

2013-10-08 westman2222

嘗試從您的Gemfile

軌道除去gem "activerecord" 4創業板應該安裝的ActiveRecord的版本，它要作爲一個其依賴關係

來源

2013-10-08 23:58:48

另外，從Rails版本中刪除.rc1。 Rails 4現已發佈。 – Dogweather

另外，你爲什麼要列出「寶石」railties？ – depa

無法在捆綁更新導軌上找到適用於gem「activemodel」的兼容版本

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