无法获取PostgreSQL数据库与Ruby on Rails工作3

Question

环境

• 的Windows 7 64位
• 的Ruby 1.8.7
• 的Rails 3.0.0
• PG AdminIII
• PostgreSQL 9.0.3
• Cygwin

的Gemfile

http://i54.tinypic.com/27yzxv4.png

数据库配置

http://i53.tinypic.com/288b7ma.png

步骤我已

• 我试图addding “宝石 'postgres的-PR'，：需要=> 'PG'” 到的Gemfile
• 是否尝试安装postgres的宝石的多个变体，
  • postgres的-PR
  • 皮克
  • 红宝石PG

我不断地在尝试运行耙分贝时，这个错误：迁移

rake aborted! 
no such file to load -- pg 
/usr/lib/ruby/gems/1.8/gems/bundler-1.0.10/lib/bundler/runtime.rb:68:in `require' 
/usr/lib/ruby/gems/1.8/gems/bundler-1.0.10/lib/bundler/runtime.rb:68:in `require' 
/usr/lib/ruby/gems/1.8/gems/bundler-1.0.10/lib/bundler/runtime.rb:66:in `each' 
/usr/lib/ruby/gems/1.8/gems/bundler-1.0.10/lib/bundler/runtime.rb:66:in `require' 
/usr/lib/ruby/gems/1.8/gems/bundler-1.0.10/lib/bundler/runtime.rb:55:in `each' 
/usr/lib/ruby/gems/1.8/gems/bundler-1.0.10/lib/bundler/runtime.rb:55:in `require' 
/usr/lib/ruby/gems/1.8/gems/bundler-1.0.10/lib/bundler.rb:120:in `require' 
/home/Other/rails_projects/test_project/config/application.rb:7 
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:29:in `gem_original_require' 
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:29:in `require' 
/home/Other/rails_projects/test_project/Rakefile:4 
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2383:in `load' 
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2383:in `raw_load_rakefile' 
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2017:in `load_rakefile' 
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling' 
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2016:in `load_rakefile' 
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2000:in `run' 
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling' 
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:1998:in `run' 
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/bin/rake:31 
/usr/bin/rake:19:in `load' 
/usr/bin/rake:19 

在这里待了好几天，真的需要一些帮助。提前致谢！

Answer 1

您需要安装PG和添加到您的Gemfile

gem 'pg' 

Answer 2

你需要指定的宝石正确的平台。在我的Gemfile中，我有：

group :development, :test do 
    gem 'pg', :platforms => :mingw 
end 

（该组存在是因为我部署到Unix平台，平台明显不同）。我似乎记得我还需要DevKit才能工作。

Answer 3

您可能需要将您的Rails版本升级到3.0.1-3.0.9，并运行gem install pg。然后为了好的措施重新运行bundle install。