Add push buttons and support inactive products

app/models/product.rb

@@ -8,6 +8,7 @@ class Product
   property :price, type: Float
   property :description
   property :visible, type: :boolean, default: true
+  property :active, type: :boolean, default: true
   property :position, type: Fixnum
 
   belongs_to :product_category
@@ -19,7 +20,7 @@ class Product
 
   validates :name, presence: true
   validates :supplier_id, presence: true
-  validates :price, numericality: {greater_than: 0}
+  validates :price, numericality: true
   view :by_supplier_id_and_id, key: [:supplier_id, :_id]
 
   #after_save :persist_product_category_ids