我已经为我的应用安装了多个state_machine gems,以便将它们用于通知系统,但每次遇到ActiveSupport问题时。它通常看起来几乎与此相同:
>> m = Message.new
TypeError: wrong argument type nil (expected Module)
from /home/Ryan/appname/app/models/message.rb:2:in `include'
from /home/Ryan/appname/app/models/message.rb:2
from /home/Ryan/.bundle/ruby/1.8/gems/activesupport-2.3.9/lib/active_sup
port/dependencies.rb:406:in `load_without_new_constant_marking'
from /home/Ryan/.bundle/ruby/1.8/gems/activesupport-2.3.9/lib/active_sup
port/dependencies.rb:406:in `load_file'
from /home/Ryan/.bundle/ruby/1.8/gems/activesupport-2.3.9/lib/active_sup
port/dependencies.rb:547:in `new_constants_in'
from /home/Ryan/.bundle/ruby/1.8/gems/activesupport-2.3.9/lib/active_sup
port/dependencies.rb:405:in `load_file'
from /home/Ryan/.bundle/ruby/1.8/gems/activesupport-2.3.9/lib/active_sup
port/dependencies.rb:285:in `require_or_load'
from /home/Ryan/.bundle/ruby/1.8/gems/activesupport-2.3.9/lib/active_sup
port/dependencies.rb:451:in `load_missing_constant'
from /home/Ryan/.bundle/ruby/1.8/gems/activesupport-2.3.9/lib/active_sup
port/dependencies.rb:106:in `rake_original_const_missing'
from /usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2503:in `const_m
issing'
from /home/Ryan/.bundle/ruby/1.8/gems/activesupport-2.3.9/lib/active_sup
port/dependencies.rb:118:in `const_missing'
from (irb):2
我在使用activerecord的Windows 7机器上,使用bundler来安装宝石,并使用rails 2.3.9 ..我在哪里出错了?我需要对数据库进行一些修改吗?
Edit: message.rb
include AlterEgo # include this first
include AlterEgo::ActiveRecordAdapter
state :unread, :default => true do
handle :state do
"unread"
end
transition :to => :read, :on => :view!
end
state :read do
handle :state do
"read"
end
end
我不是正面的,但是我在调整它以进行activerecord时遇到了麻烦。我需要创建一个新数据库吗?
答案 0 :(得分:0)
修改
我最后只使用oldschool acts_as_state_machine,因为这是一个如此简单的实现