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#5252 open

ActiveModel Naming should take care of anonymous classes

Reported by gucki | July 30th, 2010 @ 04:14 PM | in 3.0.6

When trying to use the ActiveModel Validations together with sequel like

class Message < Sequel::Model
  include ActiveModel::Validations
  validates :text, :presence => true, :length => { :within => 1..10000 }

I get the following error: ArgumentError (interning empty string).

activemodel (3.0.0.rc) lib/active_model/naming.rb:27:in to_sym' 
activemodel (3.0.0.rc) lib/active_model/naming.rb:27:inhuman'
activemodel (3.0.0.rc) lib/active_model/naming.rb:26:in map' 
activemodel (3.0.0.rc) lib/active_model/naming.rb:26:inhuman'
activemodel (3.0.0.rc) lib/active_model/errors.rb:313:in generate_message' 
activemodel (3.0.0.rc) lib/active_model/errors.rb:188:inadd'
activemodel (3.0.0.rc) lib/active_model/errors.rb:223:in add_on_blank' 
activemodel (3.0.0.rc) lib/active_model/errors.rb:221:ineach'
activemodel (3.0.0.rc) lib/active_model/errors.rb:221:in add_on_blank' 
activemodel (3.0.0.rc) lib/active_model/validations/presence.rb:9:invalidate'
activesupport (3.0.0.rc) lib/active_support/callbacks.rb:309:in send' 
activesupport (3.0.0.rc) lib/active_support/callbacks.rb:309:in_callback_before_47'
activesupport (3.0.0.rc) lib/active_support/callbacks.rb:409:in _run_validate_callbacks' 
activemodel (3.0.0.rc) lib/active_model/validations.rb:201:inrun_validations!'
activemodel (3.0.0.rc) lib/active_model/validations.rb:168:in valid?' /home/gucki/.rvm/gems/ree-1.8.7-2010.01@rails3/bundler/gems/sequel-a54e149/lib/sequel/model/base.rb:957:insave' ...

Jeremy (Sequel maintainer says): This looks like an ActiveModel bug, as they shouldn't be attempting to call to_sym on an empty string. Basically, they should be checking for anonymous classes and they aren't.

A quick fix is to modify ActiveModel::Naming from

  defaults = do |klass|


  defaults = do |klass|
    next if""

If this fix is okay, I can create a patch for it.

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