PurchaseWindowDecorator: Convert to new action links interface

Also add a new method `AF83::Decorator.define_instance_method`. Thanks
to Johan for suggesting that and walking me through writing it. This new
method allows us to define methods on the instance decorator. We need
this to preserve the `#bounding_dates` method that was defined in
`PurchaseWindowDecorator`.

Refs #5586

1 files changed, 3 insertions, 4 deletions

diff --git a/app/controllers/purchase_windows_controller.rb b/app/controllers/purchase_windows_controller.rb
index 04b5736bb..293a7d8e4 100644
--- a/app/controllers/purchase_windows_controller.rb
+++ b/app/controllers/purchase_windows_controller.rb
@@ -36,13 +36,12 @@ class PurchaseWindowsController < ChouetteController
   end
 
   def decorate_purchase_windows(purchase_windows)
-    ModelDecorator.decorate(
+    PurchaseWindowDecorator.decorate(
       purchase_windows,
-      with: PurchaseWindowDecorator,
       context: {
         referential: @referential
-        }
-      )
+      }
+    )
   end
 
    def sort_column