def model_class
      if WillFilter::Config.require_filter_extensions?
        raise WillFilter::FilterException.new("model_class method must be overloaded in the extending class.")
      end

      if model_class_name.blank?
        raise WillFilter::FilterException.new("model_class_name was not specified.")
      end

      @model_class ||= model_class_name.constantize
    end
def model_class
      if WillFilter::Config.require_filter_extensions?
        raise WillFilter::FilterException.new("model_class method must be overloaded in the extending class.")
      end

      if model_class_name.blank?
        raise WillFilter::FilterException.new("model_class_name was not specified.")
      end

      @model_class ||= model_class_name.constantize
    end
For extra security, this method must be overloaded by the extending class.