cat mod 2

app/models/category.rb

@@ -30,17 +30,23 @@ class Category < ActiveRecord::Base
     where("#{table_name}.id IN (#{tree_sql_for(instance)})").order("#{table_name}.id")
   end
 
-  def sales_by_category(pointsale_id)
+  def self.sales_by_category(pointsale_id)
     @pointsale = Pointsale.find(pointsale_id)
     @category_parents = Category.get_parents
-    @sales = Pointsale.find(pointsale_id).sales.activas
+    @sales_details = Pointsale.find(pointsale_id).sales_details.includes(:sale).where('sales.status != 1')
     puts "PUNTO DE VENTA: #{@pointsale.name}"
     puts "CATEGORIAS: #{@category_parents.count}"
-    puts "TOTAL DE VENTAS: #{@sales.count}"
-    @category.each do |category|
-      # category.children.each do |childre_of_category|
-      # end
+    puts "TOTAL DE PRODUCTOS VENDIDOS: #{@sales_details.count}"
+
+    cats = Hash.new
+    @category_parents.each do |category|
+      products_ids = category.children.includes(:products).pluck('products.id')
+      prods_from_category = @sales_details.where('product_id in (?) ', products_ids).count
+      percent_of_this_cat = (prods_from_category * 100) / @sales_details.count
+      # puts "CATEGORIA: #{category.category} #{percent_of_this_cat}%"
+      cats[category.category.to_s] = percent_of_this_cat unless percent_of_this_cat.zero?
     end
+    cats.sort_by { |_key, value| value }.reverse
   end
 
   def self.tree_sql_for(instance)