'Serialize' flavor

recircle/instance/models.py

@@ -265,8 +265,14 @@ class Instance(BaseMachineDescriptor):
         self.save()
 
     def resize(self, flavor):
+        flav = {
+            "name": flavor.name,
+            "ram": flavor.ram,
+            "vcpus": flavor.vcpus,
+            "disk": flavor.initial_disk
+        }
         try:
-            interface.resize_vm(self.remote_id, flavor)
+            interface.resize_vm(self.remote_id, flav)
             self.flavor = flavor
             self.save()
         except Exception as e: