= fields_for 'order_articles', order_article, index: order_article.id do |form|
  %tr{class: "#{cycle('even', 'odd', name: 'articles')} order-article", valign: "top"}
    - order_title = []
    - order_title.append Article.human_attribute_name(:manufacturer)+': ' + order_article.article.manufacturer unless order_article.article.manufacturer.to_s.empty?
    - order_title.append Article.human_attribute_name(:note)+': ' + order_article.article.note unless order_article.article.note.to_s.empty?
    - units_expected = (order_article.units_billed or order_article.units_to_order)
    %td= order_article.article.order_number
    %td.name{title: order_title.join("\n")}= order_article.article.name
    %td #{order_article.article.unit_quantity} × #{order_article.article.unit}
    %td #{order_article.quantity} + #{order_article.tolerance}
    %td
      = order_article.units_to_order
      %i.package pkg
    -#%td # TODO implement invoice screen
      - unless order_article.units_billed.nil?
        = order_article.units_billed
        %i.package pkg
    %td
      = form.text_field :units_received, class: 'input-nano package', data: {'units-expected' => units_expected}
      / TODO add almost invisible text_field for entering single units
    %td.units_delta