[Rails] How to set exception in client side validation gem

As you may know, this gem initializer file has code, which you need to uncomment to show validation error inline to every form field:

# Uncomment the following block if you want each input field to have the validation messages attached.

 ActionView::Base.field_error_proc = Proc.new do |html_tag, instance|

  unless html_tag =~ /^<label/

     %{<div class="field_with_errors">#{html_tag}<label for="#{instance.send(:tag_id)}" class="message">#{instance.error_message.first}</label></div>}.html_safe   else

     %{<div class="field_with_errors">#{html_tag}</div>}.html_safe

    end

end

I uncommented this code, but for one special model I want to display errors as usual. I tried to refactor default code

 ActionView::Base.field_error_proc = Proc.new do |html_tag, instance|

 if "#{instance.send(:tag_id)}"!="answer_user_answer" #that's label for this model

  unless html_tag =~ /^<label/

     %{<div class="field_with_errors">#{html_tag}<label for="#{instance.send(:tag_id)}" class="message">#{instance.error_message.first}</label></div>}.html_safe   else

     %{<div class="field_with_errors">#{html_tag}</div>}.html_safe

  end

 end

end

but that doesn't work.

Thanks in advance for help

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