= fields_for "delivery[new_stock_changes][]", stock_change, validate: true do |f|
  - f.object.quantity = '' if 0 == f.object.quantity
  %tr{:id => "stock_change_stock_article_#{stock_change.stock_article.id}", :data => {:id => stock_change.stock_article.id}}
    %td.sort-by-name
      = f.hidden_field :stock_article_id
      %span.stock_article_name= stock_change.stock_article.name
    %td.numeric.price-per-unit #{number_to_currency stock_change.stock_article.price}/#{stock_change.stock_article.unit}
    %td= f.text_field :quantity, :size => 4, :autocomplete => 'off', :required => true, :class => 'stock-change-quantity'
    %td= link_to t('.remove_article'), "#", :class => 'remove_new_stock_change btn btn-small'