WebSearch: SQLAlchemy model fix
WebSearch: SQLAlchemy model fix

tiborsimko/invenio-records,inveniosoftware/invenio-records,inveniosoftware/invenio-search,inveniosoftware/invenio-search,tiborsimko/invenio-search,tiborsimko/invenio-records,inveniosoftware/invenio-records,tiborsimko/invenio-search