防止精簡啓動的機架依賴關係

Question

.rvm/gems/ruby-1.9.3-head/gems/bundler-1.0.21/lib/bundler/runtime.rb:31:in `block in setup': You have already activated rack 1.4.0, 
but your Gemfile requires rack 1.2.5. Using bundle exec may solve this. (Gem::LoadError) 

是我在嘗試在我的任何應用上運行瘦啓動，捆綁exec瘦，rails時得到的錯誤。我試過運行系統級別和應用程序級別包更新/安裝，刪除gemfile.lock並再次更新。 Sudo級別安裝。沒有。

有什麼建議嗎？

這是我的Gemfile：

source 'http://rubygems.org' 

gem 'rails', '3.0.10' 
gem 'rake', '0.8.7' 
gem 'jquery-rails', '0.2.6' 
gem 'pg', :require => 'pg' 
gem 'devise' 
gem 'nifty-generators' 
gem 'mocha' 
gem 'thin' 
gem 'omniauth' 
require 'oauth2' 
gem 'fb_graph' 
gem 'nokogiri' 

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

gem 'gravatar_image_tag', '1.0.0.pre2' 
gem 'will_paginate', '3.0.pre2' 

group :development do 
gem 'rspec-rails', '2.5.0' 

gem 'faker', '0.9.5' 
end 

group :test do 
gem 'rspec', '2.5.0' 
gem 'webrat', '0.7.1' 
gem 'spork', '0.9.0.rc5' 
gem 'factory_girl_rails', '1.0' 
end 

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

# Deploy with Capistrano 
# gem 'capistrano' 

# To use debugger (ruby-debug for Ruby 1.8.7+, ruby-debug19 for Ruby 1.9.2+) 
# gem 'ruby-debug' 
# gem 'ruby-debug19', :require => 'ruby-debug' 

# Bundle the extra gems: 
# gem 'bj' 
# gem 'nokogiri' 

# gem 'aws-s3', :require => 'aws/s3' 

# Bundle gems for the local environment. Make sure to 
# put test-only gems in this group so their generators 
# and rake tasks are available in development mode: 
# group :development, :test do 
# gem 'webrat' 
# end 

Answer 1

您可以嘗試在你的項目根目錄添加.rvmrc與此內容：

RVM ruby​​-1.9.3-head@your-project-name

之後，重新啓動您的控制檯會話。 RVM將要求使用該文件的權限。之後，您的項目將在它自己的gemspace下運行。再次運行包，它將只安裝所需的寶石。