# Support for GET and PUT

* adds full external identifier support for GET and PUT methods on EIV, KOM, EMA and OEK

api/utils/serializer/serializer.py

@@ -171,6 +171,14 @@ class AbstractModelAPISerializer:
         Returns:
 
         """
+        # First if there is an external identifier linked to an internal one, so we can continue with the internal
+        try:
+            ext_id = ExternalIdentifier.objects.get(external_id=id)
+            id = ext_id.internal_id
+        except ObjectDoesNotExist:
+            # No external id found - let's hope the given id exists internally
+            pass
+
         obj = self.model.objects.get(
             id=id,
             deleted__isnull=True,