i18n cleanup (affects foodcoops#137)

app/models/stock_article.rb

@@ -14,10 +14,14 @@ class StockArticle < Article
 
   # Check for unclosed orders and substract its ordered quantity
   def quantity_available
-    quantity - OrderArticle.where(article_id: id).
+    quantity - quantity_ordered
+  end
+
+  def quantity_ordered
+    OrderArticle.where(article_id: id).
         joins(:order).where("orders.state = 'open' OR orders.state = 'finished'").sum(:units_to_order)
   end
-  
+
   def quantity_history
     stock_changes.reorder('stock_changes.created_at ASC').map{|s| s.quantity}.cumulative_sum
   end

app/views/stockit/index.html.haml

@@ -32,22 +32,22 @@
 %table.table.table-hover#articles
   %thead
     %tr
-      %th= t '.article.article'
-      %th= t '.article.stock'
-      %th= t '.article.ordered'
-      %th= t '.article.available'
-      %th= t '.article.unit'
-      %th= t '.article.price'
-      %th= t '.article.vat'
-      %th= t '.article.supplier'
-      %th= t '.article.category'
+      %th= Article.model_name.human
+      %th= heading_helper StockArticle, :quantity
+      %th= heading_helper StockArticle, :quantity_ordered
+      %th= heading_helper StockArticle, :available
+      %th= heading_helper StockArticle, :unit
+      %th= heading_helper StockArticle, :price
+      %th= heading_helper StockArticle, :tax
+      %th= heading_helper StockArticle, :supplier
+      %th= heading_helper StockArticle, :article_category
       %th
   %tbody
     - for article in @stock_articles
       %tr{:class => stock_article_classes(article), :id => "stockArticle-#{article.id}"}
         %td= link_to article.name, article
         %td= article.quantity
-        %td= article.quantity - article.quantity_available
+        %td= article.quantity_ordered
         %th= article.quantity_available
         %td= article.unit
         %td= article.price