anchor.diff:      div class: 'field' do
         label :title
         text_field :title
  -    end
  -
  -    div class: 'field' do
  -      label :description
  -      text_field :description
       end
   
       div class: 'field' do
  
positive.code: 
      div class: 'field' do
        label :sub_category_id
        select :sub_category_id, sub_categories_select
      end
  
      div class: 'controls' do
  
negative.code: 
      div class: 'field' do
        label :quantity
        select :quantity, select_builder((0..100))
      end
  
      div class: 'field' do
  