osx/cocoa <-> rails incompatibility

rubyonrails-talk
1

Does anyone know how to fix or even debug the following:

ActiveRecord is failing @ base.rb, line 2189: Thread.current[:"#{self}_scoped_methods"] ||= self.default_scoping.dup

with: "can't dup NilClass"

why default_scoping is nil is unknown.

The failure goes away if all references to require 'osx/cocoa' are removed.

*** LOCAL GEMS ***

actionmailer (2.3.2, 1.3.6) actionpack (2.3.2, 1.13.6) actionwebservice (1.2.6) activerecord (2.3.2, 1.15.6) activeresource (2.3.2) activesupport (2.3.2, 1.4.4) acts_as_ferret (0.4.3, 0.4.1) capistrano (2.5.5, 2.0.0) cgi_multipart_eof_fix (2.5.0) daemons (1.0.10, 1.0.9) dnssd (0.7.1, 0.6.0) fastthread (1.0.7, 1.0.1) fcgi (0.8.7) ferret (0.11.6, 0.11.4) gem_plugin (0.2.3) gnuplot (2.2) gruff (0.3.4) highline (1.5.1, 1.2.9) hpricot (0.8.1, 0.6) libxml-ruby (1.1.3, 0.9.5, 0.3.8.4) mongrel (1.1.5, 1.1.4) mysql (2.7) needle (1.3.0) net-scp (1.0.2) net-sftp (2.0.2, 1.1.0) net-ssh (2.0.11, 1.1.2) net-ssh-gateway (1.0.1) rails (2.3.2, 1.2.6) rake (0.8.6, 0.7.3) RedCloth (4.1.9, 3.0.4) rmagick (2.9.1) ruby-openid (2.1.6, 1.1.4) ruby-yadis (0.3.4) rubygems-update (1.3.3, 1.3.2) rubynode (0.1.5, 0.1.3) sqlite3-ruby (1.2.4, 1.2.1) termios (0.9.4) tlsmail (0.0.1) tmail (1.2.3.1)

ruby 1.8.6 (2008-08-11 patchlevel 287) [universal-darwin9.0]

thanks in advance

2

I've seen this before - it's typically a sign that something has screwed up the inherited callback for AR::Base. And a quick look at the rubycocoa source shows this: (in RubyCocoa download | SourceForge.net

class ActiveRecord::Base   class << self     alias_method :__inherited_before_proxy, :inherited     def inherited(klass)       proxy_klass = "#{klass.to_s}Proxy"       unless klass.parent.local_constants.include?(proxy_klass)         eval "class ::#{proxy_klass} < OSX::ActiveRecordProxy; end;"         # FIXME: This leads to a TypeError originating from: oc_import.rb:618:in `method_added'         # Object.const_set(proxy_klass, Class.new (OSX::ActiveRecordProxy))       end       __inherited_before_proxy(klass)     end   end

There's something going on, but I'm not clear why this would cause a problem. You might do better asking on a rubycocoa list...

--Matt Jones