Merge branch 'f-parents' into 'dev'

MAINT: use id of entities

See merge request caosdb/caosdb-advanced-user-tools!59

src/caosadvancedtools/cfood.py

@@ -503,10 +503,11 @@ def assure_parents_are(entity, parents, to_be_updated=None,
         if isinstance(e, db.Entity):
             if e.name is None:
                 raise Exception("Entity should have name")
-            parents[i] = e.name
+        else:
+            parents[i] = db.Entity(name=e)
 
     if ([p.name.lower() for p in entity.get_parents()]
-            == [p.lower() for p in parents]):
+            == [p.name.lower() for p in parents]):
 
         logger.debug("entity {} has parents {}".format(entity.id, parents))