Wire disk images to VM creation/ordering

uncloud_django_based/uncloud/uncloud_vm/views.py

@@ -122,10 +122,15 @@ class VMProductViewSet(ProductViewSet):
                 owner=request.user,
                 starting_date=timezone.now()
                 )
-        order.save()
+
+        # Create disk image.
+        disk = VMDiskProduct(owner=request.user, order=order,
+                **serializer.validated_data.pop("primary_disk"))
 
         # Create VM.
-        vm = serializer.save(owner=request.user, order=order)
+        vm = serializer.save(owner=request.user, order=order, primary_disk=disk)
+        disk.vm = vm
+        disk.save()
 
         return Response(serializer.data)