check that field to order is provided by OrderedDict

guillotina/contrib/image/api.py

@@ -11,6 +11,7 @@
 from guillotina.interfaces.content import IResource
 from guillotina.response import HTTPNoContent
 from guillotina.response import HTTPNotFound
+from guillotina.schema.interfaces import IOrderedDict
 from guillotina.utils import get_registry
 from guillotina.utils import run_async
 from io import BytesIO
@@ -150,4 +151,5 @@ async def __call__(self):
 class OrderMultiImage(TraversableFieldService):
     async def __call__(self):
         data = await self.request.json()
-        self.field.reorder_images(data)
+        if IOrderedDict.providedBy(self.field):
+            self.field.reorder_images(data)