My wiki page has an embedded SPARQL query like the following:
{{#sparql: prefix pdmm: <http://example.com/bla#> select distinct ?dataModelEntity ?desc where { <{{{uri}}}> pdmm:hasRelatedClass ?dataModelEntity . optional { ?dataModelEntity pdmm:shortDescription ?desc . filter(lang(?desc) = "en") . } } |headers=Data Model Element, Description |classHeaders= class="text-nowrap" |templates=SystemInterfaceRelation, |footer=NO }}
As long as each result row has a value for "?desc" all is fine. However, as soon as one result does not include a value for "?desc" I get the following error on the Wiki page:
Notice: Undefined index: desc in /opt/app-root/src/php/w/extensions/LinkedWiki/parser/SparqlParser.php on line 254
The rest of the page will still render but the error message is there.
Some versioning info:
- Mediawiki: 1.32.0
- Skin: Tweeki 1.1.0
- Sem MW: 3.0.2
- LinkedWiki: 3.2.0