MAINT: fix datatype comparison

src/linkahead/apiutils.py

@@ -248,6 +248,21 @@ def compare_entities(old_entity: Entity,
         if old_entity_attr_na and new_entity_attr_na:
             continue
 
+        # treat datatype separately: if datatype is an object on one side and string on the other.
+        if attr == "datatype":
+            if (not old_entity_attr_na and not new_entity_attr_na):
+                if isinstance(oldattr, RecordType):
+                    if oldattr.name == newattr:
+                        continue
+                    if oldattr.id == newattr:
+                        continue
+                if isinstance(newattr, RecordType):
+                    if newattr.name == oldattr:
+                        continue
+                    if newattr.id == oldattr:
+                        continue
+
+
         # only one set or different values
         if ((old_entity_attr_na ^ new_entity_attr_na)
                 or (oldattr != newattr)):
@@ -257,6 +272,7 @@ def compare_entities(old_entity: Entity,
             if not new_entity_attr_na:
                 newdiff[attr] = newattr
 
+
     # value
     if (old_entity.value != new_entity.value):
         # basic comparison of value objects says they are different