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has_many_polymorphs broken for Rails 2.1.x

The guys on has_many_polymorphs are doing a great job keeping the plugin up to date with edge Rails.

This commit broke the plugin with Rails 2.1.x

NameError: uninitialized constant ActiveRecord::Reflection::ClassMethods::ThroughReflection

Just revert to the AssociationReflection instead of ThroughReflection logic and all should be fine.

Posted in Ruby.

2 Responses

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  1. melinda says

    Tamer: I’m a bit of a noob, and getting this error while trying to install the tags extension.

    but I do not understand how to ‘revert to the AssociationReflection instad of ThroughReflection logic’. Is this a different commit that I should check out? Or do I need to edit something?

  2. Tamer says

    In lib/has_many_polymorphs/reflection.rb of your plugin; try replacing those two lines

    klass = options[:through] ? ThroughReflection : AssociationReflection
    reflection =, name, options, active_record)


    reflection =, name, options, active_record)

    And see if that would work

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