Display exchange product names

app/presenters/exchange_presenter.rb

@@ -0,0 +1,14 @@
+class ExchangePresenter
+  attr_accessor :exchange
+
+  def initialize(exchange)
+    @exchange = exchange
+  end
+
+  delegate :id, :sender_id, :receiver_id, :exchange_variants, :to => :exchange
+
+  def exchange_products
+    @exchange.exchange_variants.group_by { |ev| ev.variant.product }
+  end
+
+end

app/views/admin/order_cycles/_form.html.haml

@@ -24,7 +24,9 @@
       %td {{ enterprises[exchange.enterprise_id].name }}
       %td= f.submit 'Products', 'ng-click' => 'toggleProducts($event, exchange)'
     %tr.products{'ng-show' => 'exchange.showProducts'}
-      %td{:colspan => 3} Hello, products
+      %td{:colspan => 3}
+        .exchange-product{'ng-repeat' => 'product in exchange.exchange_products'}
+          {{ product.name }}
 
 = select_tag :new_supplier_id, options_from_collection_for_select(Enterprise.is_primary_producer, :id, :name), {'ng-model' => 'new_supplier_id'}
 = f.submit 'Add supplier', 'ng-click' => 'addSupplier($event)'

app/views/admin/order_cycles/show.rep

@@ -4,11 +4,13 @@ r.element :order_cycle, @order_cycle do
   r.element :orders_open_at
   r.element :orders_close_at
   r.element :coordinator_id
-  r.list_of :exchanges do
+  r.list_of :exchanges, @order_cycle.exchanges.map { |e| ExchangePresenter.new(e) } do
     r.element :sender_id
     r.element :receiver_id
-    r.list_of :exchange_variants do |ev|
-      r.element :variant, VariantPresenter.new(ev.variant) do
+    r.list_of :exchange_products do |product, exchange_variants|
+      r.element :id, product.id
+      r.element :name, product.name
+      r.list_of :variants, exchange_variants.map { |ev| VariantPresenter.new(ev.variant) } do
         r.element :id
         r.element :image_url
       end