配置和运行的Ruby-on-Rails迁移

Question

我（完全）新ROR并得到了应用维护和升级。我以前做的源代码，我试图用db:migrate rake命令创建数据库。我一直在使用的Aptana Studio进行开发开始。当我运行dg:migrate我收到以下错误：

rake db:migrate
(in G:/Projects/.../.../trunk)
MissingSourceFile no such file to load -- rcov/rcovtask
WARNING: rcov tests won't work
Looking for release_type overrides ...
=> Loading G:/Projects/.../.../trunk/config/release_type_config.rb
DEPRECATION WARNING: ActiveRecord::Base.allow_concurrency=has been deprecated and
no longer has any effect. Please remove all references to allow_concurrency=.. 
(called from allow_concurrency= at D:/Ruby/lib/ruby/gems/1.8/gems/
activerecord-2.3.5/lib/active_record/connection_adapters/abstract/
connection_specification.rb:98)
DEPRECATION WARNING: ActiveRecord::Base.verification_timeout= has been deprecated
and no longer has any effect. Please remove all references to 
verification_timeout=.. (called from verification_timeout= at    
D:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/
connection_adapters/abstract/connection_specification.rb:108)
rake aborted!
no such file to load -- hpricot

我已经安装角度来说，Hpricot宝石也（版本0.8）。

什么是补救呢？

Answer 1

最有效位误差是

rake aborted!
no such file to load -- hpricot

您需要的角度来说，Hpricot。可以安装在命令行上运行下面的命令

gem install hpricot

Answer 2

安装rcov宝石：

gem install relevance-rcov --source http://gems.github.com

Answer 3

也许你的系统无法找到宝石。这可能是一个路径问题，请参见这个职位详细信息。