add base price to group order form

app/helpers/group_orders_helper.rb

@@ -53,4 +53,12 @@ module GroupOrdersHelper
       return 'missing-many'
     end
   end
+
+  def price_per_base_unit(article:, price:)
+    quantity_unit = QuantityUnit.parse(article.unit)
+    return nil unless quantity_unit.present?
+
+    scaled_price, base_unit = quantity_unit.scale_price_to_base_unit(price)
+    "#{number_to_currency(scaled_price)}/#{base_unit}"
+  end
 end

app/views/group_orders/_form.html.haml

@@ -77,6 +77,7 @@
           %th{style: 'width:120px'}= heading_helper StockArticle, :supplier
         %th{style: "width:13px;"}
         %th{style: "width:4.5em;"}= t '.price'
+        %th{style: "width:4.5em;"}= t '.price_per_base_unit'
         %th{style: "width:4.5em;"}= heading_helper Article, :unit
         - unless @order.stockit?
           %th{style: "width:70px;"}= heading_helper OrderArticle, :missing_units, short: true
@@ -100,6 +101,7 @@
               %td= truncate order_article.article.supplier.name, length: 15
             %td= h order_article.article.origin
             %td= number_to_currency(@ordering_data[:order_articles][order_article.id][:price])
+            %td= price_per_base_unit(article: order_article.article, price: @ordering_data[:order_articles][order_article.id][:price])
             %td= order_article.article.unit
             %td
               - if @order.stockit?

config/locales/de.yml

@@ -1052,6 +1052,7 @@ de:
       action_save: Bestellung speichern
       new_funds: Neuer Kontostand
       price: Preis
+      price_per_base_unit: Grundpreis
       reset_article_search: Suche zurücksetzen
       search_article: Artikel suchen...
       sum_amount: Gesamtbestellmenge bisher

config/locales/en.yml

@@ -1054,6 +1054,7 @@ en:
       action_save: Save order
       new_funds: New account balance
       price: Price
+      price_per_base_unit: Base price
       reset_article_search: Reset search
       search_article: Search for articles...
       sum_amount: Current amount

config/locales/es.yml

@@ -929,6 +929,7 @@ es:
       action_save: Guardar pedido
       new_funds: Nuevo balance de cuenta
       price: Precio
+      price_per_base_unit: Precio de base
       reset_article_search: Reinicia la búsqueda
       search_article: Busca artículos...
       sum_amount: Cantidad actual

config/locales/fr.yml

@@ -678,6 +678,7 @@ fr:
       action_save: Enregistrer ta commande
       new_funds: Nouveau solde
       price: Prix
+      price_per_base_unit: Prix de base
       reset_article_search: Réinitialiser la recherche
       search_article: Rechercher des produits...
       sum_amount: Quantité déjà commandée

config/locales/nl.yml

@@ -1024,6 +1024,7 @@ nl:
       action_save: Bestelling opslaan
       new_funds: Nieuw tegoed
       price: Prijs
+      price_per_base_unit: Basisprjis
       reset_article_search: Alles tonen
       search_article: Artikelen zoeken...
       sum_amount: Huidig totaalbedrag