Continue adding product variants

app/assets/javascripts/user/app/models/product.js.coffee

@@ -6,5 +6,26 @@ App.Product = DS.Model.extend
   position: attr('number', defaultValue: 0)
   active: attr 'boolean', defaultValue: true
   image: attr()
-  product_category: DS.belongsTo('product_category')
-  product_orders: DS.hasMany('product_order')
+  product_category: DS.belongsTo('product-category')
+  product_orders: DS.hasMany('product-order')
+  product_variants: DS.hasMany 'product-variant'
+  sorted_product_variants: Ember.computed 'product_variants.@each.name', 'product_variants.@each.position', ->
+    @get('product_variants').sortBy('position')
+
+  variantsDisplay: Ember.computed 'sorted_product_variants', ->
+    @get('sorted_product_variants').mapBy('name').join(', ')
+
+  addOrderItem: (options = {})->
+    #if existing = @store.all('product_order').find((po)-> po.get('product') == product and not po.get('order'))
+    if options.product_variant
+      existing = @get('product_orders').find( (po)-> !po.get('order') and po.get('product_variant') is options.product_variant )
+    else
+      existing = @get('product_orders').find( (po)-> !po.get('order') )
+
+    if existing
+      existing.increment()
+    else
+      @store.createRecord 'product_order',
+        product: this
+        price: @get('price')
+        product_variant: options.product_variant