我无法在我的项目中执行 rake 任务。我总是收到以下错误消息：
rake aborted!
undefined method `to_sentence' for #<Array:0x10153c800>
/Users/username/.rvm/gems/ruby-1.8.7-p334/gems/rails-2.3.11/lib/tasks/rails.rb:10
/Users/username/.rvm/rubies/ruby-1.8.7-p334/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `gem_original_require'
/Users/username/.rvm/rubies/ruby-1.8.7-p334/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `require'
/Users/username/Documents/project/Rakefile:10
/Users/username/.rvm/gems/ruby-1.8.7-p334/gems/rake-0.8.7/lib/rake.rb:2383:in `load'
/Users/username/.rvm/gems/ruby-1.8.7-p334/gems/rake-0.8.7/lib/rake.rb:2383:in `raw_load_rakefile'
/Users/username/.rvm/gems/ruby-1.8.7-p334/gems/rake-0.8.7/lib/rake.rb:2017:in `load_rakefile'
/Users/username/.rvm/gems/ruby-1.8.7-p334/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling'
/Users/username/.rvm/gems/ruby-1.8.7-p334/gems/rake-0.8.7/lib/rake.rb:2016:in `load_rakefile'
/Users/username/.rvm/gems/ruby-1.8.7-p334/gems/rake-0.8.7/lib/rake.rb:2000:in `run'
/Users/username/.rvm/gems/ruby-1.8.7-p334/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling'
/Users/username/.rvm/gems/ruby-1.8.7-p334/gems/rake-0.8.7/lib/rake.rb:1998:in `run'
/Users/username/.rvm/gems/ruby-1.8.7-p334/gems/rake-0.8.7/bin/rake:31
/Users/username/.rvm/gems/ruby-1.8.7-p334/bin/rake:19:in `load'
/Users/username/.rvm/gems/ruby-1.8.7-p334/bin/rake:19
ruby 1.8.7 (2011-02-18 补丁级别 334) [i686-darwin10.8.0]
导轨 2.3.11
耙子，版本 0.8.7
我尝试使用 rake 0.9.2 和/或 ruby 1.9.2 没有更多成功。
这是我的 Rakefile 的内容：
# Add your own tasks in files placed in lib/tasks ending in .rake,
# for example lib/tasks/capistrano.rake, and they will automatically be available to Rake.
require(File.join(File.dirname(__FILE__), 'config', 'boot'))
require 'rake'
require 'rake/testtask'
require 'rdoc/task'
require 'tasks/rails'
谢谢你的帮助 ！