powerdns-on-rails 参数错误

Question

我的环境：

CentOS 5
ruby 1.8.6 (2008-08-11 patchlevel 287) [x86_64-linux]
Ruby Enterprise Edition 20090610
passneger or webrick

我使用这个 gem 列表。

*** LOCAL GEMS ***
actionmailer (2.3.2, 2.2.2)
actionpack (2.3.2, 2.2.2)
activerecord (2.3.2, 2.2.2)
activeresource (2.3.2, 2.2.2)
activesupport (2.3.2, 2.2.2)
fastthread (1.0.7)
haml (2.2.13)
mysql (2.7)
passenger (2.2.2)
rack (1.0.0)
rails (2.3.2, 2.2.2)
rake (0.8.7)
rmagick (2.9.2)
sqlite3-ruby (1.2.4)
will_paginate (2.2.2)

这是错误消息。我不知道如何解决它。请帮我。

当我使用webrick时：

Processing DashboardController#index (for 114.204.152.246 at 2009-11-14 10:52:57) [GET]

ArgumentError (Cannot yield from a Proc type filter. The Proc must take two arguments and execute #call on the second argument.):
  haml (2.2.5) [v] rails/./lib/sass/plugin/rails.rb:19:in `process'
  /opt/ruby-enterprise-1.8.6-20090610/lib/ruby/1.8/webrick/httpserver.rb:104:in `service'
  /opt/ruby-enterprise-1.8.6-20090610/lib/ruby/1.8/webrick/httpserver.rb:65:in `run'
  /opt/ruby-enterprise-1.8.6-20090610/lib/ruby/1.8/webrick/server.rb:173:in `start_thread'
  /opt/ruby-enterprise-1.8.6-20090610/lib/ruby/1.8/webrick/server.rb:162:in `start'
  /opt/ruby-enterprise-1.8.6-20090610/lib/ruby/1.8/webrick/server.rb:162:in `start_thread'
  /opt/ruby-enterprise-1.8.6-20090610/lib/ruby/1.8/webrick/server.rb:95:in `start'
  /opt/ruby-enterprise-1.8.6-20090610/lib/ruby/1.8/webrick/server.rb:92:in `each'
  /opt/ruby-enterprise-1.8.6-20090610/lib/ruby/1.8/webrick/server.rb:92:in `start'
  /opt/ruby-enterprise-1.8.6-20090610/lib/ruby/1.8/webrick/server.rb:23:in `start'
  /opt/ruby-enterprise-1.8.6-20090610/lib/ruby/1.8/webrick/server.rb:82:in `start'

Rendering /var/rails/powerdns-on-rails/public/500.html (500 Internal Server Error)

当我使用passenger时：

Processing DashboardController#index (for 114.204.152.246 at 2009-11-14 10:22:50) [GET]

ArgumentError (Cannot yield from a Proc type filter. The Proc must take two arguments and execute #call on the second argument.):
  haml (2.2.5) [v] rails/./lib/sass/plugin/rails.rb:19:in `process'
  passenger (2.2.2) lib/phusion_passenger/rack/request_handler.rb:81:in `process_request'
  passenger (2.2.2) lib/phusion_passenger/abstract_request_handler.rb:203:in `main_loop'
  passenger (2.2.2) lib/phusion_passenger/railz/application_spawner.rb:340:in `start_request_handler'
  passenger (2.2.2) lib/phusion_passenger/railz/application_spawner.rb:298:in `handle_spawn_application'
  passenger (2.2.2) lib/phusion_passenger/utils.rb:181:in `safe_fork'
  passenger (2.2.2) lib/phusion_passenger/railz/application_spawner.rb:296:in `handle_spawn_application'
  passenger (2.2.2) lib/phusion_passenger/abstract_server.rb:337:in `__send__'
  passenger (2.2.2) lib/phusion_passenger/abstract_server.rb:337:in `main_loop'
  passenger (2.2.2) lib/phusion_passenger/abstract_server.rb:187:in `start_synchronously'
  passenger (2.2.2) lib/phusion_passenger/abstract_server.rb:154:in `start'
  passenger (2.2.2) lib/phusion_passenger/railz/application_spawner.rb:192:in `start'
  passenger (2.2.2) lib/phusion_passenger/spawn_manager.rb:257:in `spawn_rails_application'
  passenger (2.2.2) lib/phusion_passenger/abstract_server_collection.rb:126:in `lookup_or_add'
  passenger (2.2.2) lib/phusion_passenger/spawn_manager.rb:251:in `spawn_rails_application'
  passenger (2.2.2) lib/phusion_passenger/abstract_server_collection.rb:80:in `synchronize'
  passenger (2.2.2) lib/phusion_passenger/abstract_server_collection.rb:79:in `synchronize'
  passenger (2.2.2) lib/phusion_passenger/spawn_manager.rb:250:in `spawn_rails_application'
  passenger (2.2.2) lib/phusion_passenger/spawn_manager.rb:153:in `spawn_application'
  passenger (2.2.2) lib/phusion_passenger/spawn_manager.rb:282:in `handle_spawn_application'
  passenger (2.2.2) lib/phusion_passenger/abstract_server.rb:337:in `__send__'
  passenger (2.2.2) lib/phusion_passenger/abstract_server.rb:337:in `main_loop'
  passenger (2.2.2) lib/phusion_passenger/abstract_server.rb:187:in `start_synchronously'

Rendering /var/rails/powerdns-on-rails/public/500.html (500 Internal Server Error)

Answer 1

我有同样的问题，但我的红宝石已经是 1.8.7 了。
好的，看看这篇文章 http://citizen428.net/archives/846，
我的解决方案

after_save :callback

define_method :callback do
    # do something
end

改为

after_save :callback

def callback do
    # do something
end

Answer 2

我也被困在这个问题上，虽然我无法给你解释这个问题，但我可以告诉你升级到 REE 1.8.7 为我解决了这个问题。我猜测这是 ruby​​ 1.8.6 的一些问题，由 Rails 补丁暴露出来，但这只是一个猜测。

顺便说一句，如果您想查看引入“Can not yield from a Proc”错误的 Rails 提交，请查看 http://dev.rubyonrails.org/changeset/5163

希望有所帮助。