Rails 4.0.0 - "没有将nil隐式转换为String"

Question

刚刚安装了一个全新的Rails 4.0.0应用程序,我得到了这个错误(https://gist.github.com/hartator/6404820)http://0.0.0.0:3000:

no implicit conversion of nil into String

activerecord (4.0.0) lib/active_record/connection_adapters/sqlite3_adapter.rb:24:in `initialize'
activerecord (4.0.0) lib/active_record/connection_adapters/sqlite3_adapter.rb:24:in `new'
activerecord (4.0.0) lib/active_record/connection_adapters/sqlite3_adapter.rb:24:in `sqlite3_connection'
activerecord (4.0.0) lib/active_record/connection_adapters/abstract/connection_pool.rb:440:in `new_connection'
activerecord (4.0.0) lib/active_record/connection_adapters/abstract/connection_pool.rb:450:in `checkout_new_connection'
activerecord (4.0.0) lib/active_record/connection_adapters/abstract/connection_pool.rb:421:in `acquire_connection'
activerecord (4.0.0) lib/active_record/connection_adapters/abstract/connection_pool.rb:356:in `block in checkout'
/Users/asa/.rvm/rubies/ruby-2.0.0-p195/lib/ruby/2.0.0/monitor.rb:211:in `mon_synchronize'
activerecord (4.0.0) lib/active_record/connection_adapters/abstract/connection_pool.rb:355:in `checkout'
activerecord (4.0.0) lib/active_record/connection_adapters/abstract/connection_pool.rb:265:in `block in connection'
/Users/asa/.rvm/rubies/ruby-2.0.0-p195/lib/ruby/2.0.0/monitor.rb:211:in `mon_synchronize'
activerecord (4.0.0) lib/active_record/connection_adapters/abstract/connection_pool.rb:264:in `connection'
activerecord (4.0.0) lib/active_record/connection_adapters/abstract/connection_pool.rb:546:in `retrieve_connection'
activerecord (4.0.0) lib/active_record/connection_handling.rb:79:in `retrieve_connection'
activerecord (4.0.0) lib/active_record/connection_handling.rb:53:in `connection'

我的database.yml:http://pastebin.com/JM5TNmNU

我还没有对vanilla rails代码做过任何事情.知道可能是什么问题吗？

使用:

• Rails 4.0.0
• Ruby 2.0.0p195
• 山狮10.8.2

Answer 1

这听起来像是你的sqlite3 gem安装问题.尝试:

gem pristine sqlite3

从RubyGems文档:

宝石原始

将已安装的gems从位于gem缓存中的文件恢复为pristine条件

用法

gem pristine [GEMNAME ...] [options]

http://guides.rubygems.org/command-reference/#gem_pristine