Modify the db.execute code.

Author: EstelleDa

tests/helpers/util/contributor.py

@@ -1,4 +1,5 @@
 from sqlalchemy.orm.exc import NoResultFound
+from sqlalchemy import select
 from sqlalchemy.orm import Session
 from typing import Any
 
@@ -11,7 +12,8 @@ def add_contributor(db: Session, urn: str, model: Any, orcid_id: str, given_name
     assert item is not None
 
     try:
-        contributor = db.query(Contributor).filter(Contributor.orcid_id == orcid_id).one()
+        # scalar_one(): extract the ORM instance from the result
+        contributor = db.execute(select(Contributor).where(Contributor.orcid_id == orcid_id)).scalar_one()
     except NoResultFound:
         contributor = Contributor(orcid_id=orcid_id, given_name=given_name, family_name=family_name)
         db.add(contributor)