无法在rails 3.2中使用postgres创建测试数据库

Question

这是一个非常奇怪的问题。我试着做一个简单的rake db:test:clone或创建并不管我做什么，从清除到宝石尝试各种各样的database.yml的configs的，即时得到最奇怪的错误：

LINE 1: CREATE DATABASE "tdt_test"0.0 

有没有人见过这样的事之前？ WTF是“0.0！？”我运行Rails 3.2，RSpec和pg宝石0.14.1

04:15 PM ~/projects/dmvcs (feature/helpdesk) => RAILS_ENV=test rake db:create 
    /Users/jlippiner/.rvm/gems/ruby-1.9.3-p194@dmvcs/gems/activesupport-3.2.8/lib/active_support/dependencies.rb:251:in `block in require': iconv will be deprecated in the future, use String#encode instead. 
    Notice: for 10x faster LSI support, please install http://rb-gsl.rubyforge.org/ 
    PG::Error: ERROR: syntax error at or near "0.0" 
    LINE 1: CREATE DATABASE "tdt_test"0.0 
            ^
    : CREATE DATABASE "tdt_test"0.0 
    /Users/jlippiner/.rvm/gems/ruby-1.9.3-p194@dmvcs/gems/activerecord-3.2.8/lib/active_record/connection_adapters/postgresql_adapter.rb:654:in `async_exec' 
    /Users/jlippiner/.rvm/gems/ruby-1.9.3-p194@dmvcs/gems/activerecord-3.2.8/lib/active_record/connection_adapters/postgresql_adapter.rb:654:in `block in execute' 
    /Users/jlippiner/.rvm/gems/ruby-1.9.3-p194@dmvcs/gems/activerecord-3.2.8/lib/active_record/connection_adapters/abstract_adapter.rb:280:in `block in log' 
    /Users/jlippiner/.rvm/gems/ruby-1.9.3-p194@dmvcs/gems/activesupport-3.2.8/lib/active_support/notifications/instrumenter.rb:20:in `instrument' 
    /Users/jlippiner/.rvm/gems/ruby-1.9.3-p194@dmvcs/gems/activerecord-3.2.8/lib/active_record/connection_adapters/abstract_adapter.rb:275:in `log' 
    /Users/jlippiner/.rvm/gems/ruby-1.9.3-p194@dmvcs/gems/activerecord-3.2.8/lib/active_record/connection_adapters/postgresql_adapter.rb:653:in `execute' 
    /Users/jlippiner/.rvm/gems/ruby-1.9.3-p194@dmvcs/gems/activerecord-3.2.8/lib/active_record/connection_adapters/postgresql_adapter.rb:768:in `create_database' 
    /Users/jlippiner/.rvm/gems/ruby-1.9.3-p194@dmvcs/gems/activerecord-3.2.8/lib/active_record/railties/databases.rake:107:in `rescue in create_database' 
    /Users/jlippiner/.rvm/gems/ruby-1.9.3-p194@dmvcs/gems/activerecord-3.2.8/lib/active_record/railties/databases.rake:51:in `create_database' 
    /Users/jlippiner/.rvm/gems/ruby-1.9.3-p194@dmvcs/gems/activerecord-3.2.8/lib/active_record/railties/databases.rake:40:in `block (3 levels) in <top (required)>' 
    /Users/jlippiner/.rvm/gems/ruby-1.9.3-p194@dmvcs/gems/activerecord-3.2.8/lib/active_record/railties/databases.rake:40:in `each' 
    /Users/jlippiner/.rvm/gems/ruby-1.9.3-p194@dmvcs/gems/activerecord-3.2.8/lib/active_record/railties/databases.rake:40:in `block (2 levels) in <top (required)>' 
    /Users/jlippiner/.rvm/gems/ruby-1.9.3-p194@global/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `call' 
    /Users/jlippiner/.rvm/gems/ruby-1.9.3-p194@global/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `block in execute' 
    /Users/jlippiner/.rvm/gems/ruby-1.9.3-p194@global/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `each' 
    /Users/jlippiner/.rvm/gems/ruby-1.9.3-p194@global/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `execute' 
    /Users/jlippiner/.rvm/gems/ruby-1.9.3-p194@global/gems/rake-0.9.2.2/lib/rake/task.rb:158:in `block in invoke_with_call_chain' 
    /Users/jlippiner/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize' 
    /Users/jlippiner/.rvm/gems/ruby-1.9.3-p194@global/gems/rake-0.9.2.2/lib/rake/task.rb:151:in `invoke_with_call_chain' 
    /Users/jlippiner/.rvm/gems/ruby-1.9.3-p194@global/gems/rake-0.9.2.2/lib/rake/task.rb:144:in `invoke' 
    /Users/jlippiner/.rvm/gems/ruby-1.9.3-p194@global/gems/rake-0.9.2.2/lib/rake/application.rb:116:in `invoke_task' 
    /Users/jlippiner/.rvm/gems/ruby-1.9.3-p194@global/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `block (2 levels) in top_level' 
    /Users/jlippiner/.rvm/gems/ruby-1.9.3-p194@global/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `each' 
    /Users/jlippiner/.rvm/gems/ruby-1.9.3-p194@global/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `block in top_level' 
    /Users/jlippiner/.rvm/gems/ruby-1.9.3-p194@global/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling' 
    /Users/jlippiner/.rvm/gems/ruby-1.9.3-p194@global/gems/rake-0.9.2.2/lib/rake/application.rb:88:in `top_level' 
    /Users/jlippiner/.rvm/gems/ruby-1.9.3-p194@global/gems/rake-0.9.2.2/lib/rake/application.rb:66:in `block in run' 
    /Users/jlippiner/.rvm/gems/ruby-1.9.3-p194@global/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling' 
    /Users/jlippiner/.rvm/gems/ruby-1.9.3-p194@global/gems/rake-0.9.2.2/lib/rake/application.rb:63:in `run' 
    /Users/jlippiner/.rvm/gems/ruby-1.9.3-p194@global/gems/rake-0.9.2.2/bin/rake:33:in `<top (required)>' 
    /Users/jlippiner/.rvm/gems/ruby-1.9.3-p194@global/bin/rake:19:in `load' 
    /Users/jlippiner/.rvm/gems/ruby-1.9.3-p194@global/bin/rake:19:in `<main>' 
    /Users/jlippiner/.rvm/gems/ruby-1.9.3-p194@dmvcs/bin/ruby_noexec_wrapper:14:in `eval' 
    /Users/jlippiner/.rvm/gems/ruby-1.9.3-p194@dmvcs/bin/ruby_noexec_wrapper:14:in `<main>' 
    Couldn't create database for {"adapter"=>"postgresql", "encoding"=>"unicode", "database"=>"tdt_test", "username"=>"jlippiner", "pool"=>5, "password"=>nil} 
    /Users/jlippiner/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/test/unit.rb:167:in `block in non_options': file not found: db:create (ArgumentError) 
    from /Users/jlippiner/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/test/unit.rb:146:in `map!' 
    from /Users/jlippiner/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/test/unit.rb:146:in `non_options' 
    from /Users/jlippiner/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/test/unit.rb:207:in `non_options' 
    from /Users/jlippiner/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/test/unit.rb:52:in `process_args' 
    from /Users/jlippiner/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/minitest/unit.rb:891:in `_run' 
    from /Users/jlippiner/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/minitest/unit.rb:884:in `run' 
    from /Users/jlippiner/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/test/unit.rb:21:in `run' 
    from /Users/jlippiner/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/test/unit.rb:326:in `block (2 levels) in autorun' 
    from /Users/jlippiner/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/test/unit.rb:27:in `run_once' 
    from /Users/jlippiner/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/test/unit.rb:325:in `block in autorun' 

Answer 1

这是一个特定的情况，但它可能会帮助别人。

原来darn classifer gem是OVER WRITING Array.sum方法。一旦我删除了，一切都很好。