Improve stock_article_selections

app/models/stock_article.rb

@@ -22,6 +22,11 @@ class StockArticle < Article
   def self.stock_value
     available.collect { |a| a.quantity * a.gross_price }.sum
   end
+  
+  def self.elements_for_index
+    StockArticle.includes(:supplier, :article_category).
+      order('suppliers.name, article_categories.name, articles.name')
+  end
 
   protected
 

app/models/stock_article_selection.rb

@@ -13,6 +13,18 @@ class StockArticleSelection < ActiveRecord::Base
     all_articles = stock_article_ids
   end
   
+  def deletable_count
+    stock_articles.select { |a| a.quantity_available<=0 }.length
+  end
+  
+  def nondeletable_count
+    stock_articles.select { |a| a.quantity_available>0 }.length
+  end
+  
+  def deleted_count
+    stock_articles.only_deleted.count
+  end
+  
   protected
   
   def include_stock_articles