Merge branch 'f-fix-dt' into 'dev'

MAINT: rename and docstring"

See merge request !147

src/caoscrawler/crawl.py

@@ -936,7 +936,7 @@ class Crawler(object):
                 if isinstance(el, str):
                     try:
                         # the get_entity function will raise an error if not unique
-                        propval.append(Crawler._get_property_id_for_datatype(rtname=prop.datatype,
+                        propval.append(Crawler._get_property_id_for_datatype(rtname=dt,
                                                                              name=el))
                     except (db.EmptyUniqueQueryError, db.QueryNotUniqueError):
                         logger.error(