I was experimenting with storing models in Ruby’s global space (as a
quick and dirty alternative to memcached), and I came across some
weird behavior I couldn’t figure out.
First, I create a basic ActiveRecord model:
class Bob < ActiveRecord::Base
def chunky; ‘bacon’; end
Next, I write a controller that sticks the model in a global and calls
class TestController < ApplicationController
$some_global ||= Bob.new
render :inline => $some_global.chunky
Then I start up a Mongrel via script/server and call the
TestController. The first time I do this, things go as expected: it
just spits out ‘bacon’. The second time, however, I get a
NoMethodError saying $some_global doesn’t have a chunky method. I
checked $some_global’s class and depending on the method called, get
$some_global.class # => Bob
$some_global.is_a? Bob # => false
I also ran $some_global.methods, which prints out of the methods
associated with ActiveRecord (e.g. save and valid?) but no chunky.
This only appears to happen with models inheriting from ActiveRecord.
Removing ActiveRecord::Base from the inheritance chain seems to avoid
Anyone have any ideas why this happens? Thanks!