[Wikidata-bugs] [Maniphest] [Created] T212084: wikibase:mwapi query returns empty objects

[Vort]

Vort created this task. Vort added a project: Wikidata-Query-Service. Restricted Application added a subscriber: Aklapper. Restricted Application added a project: Wikidata.

TASK DESCRIPTION

For some objects, query with wikibase:mwapi request returns empty items.
It becomes a problem when there are no Wikidata item is linked to article.
But such thing can happen even when item is linked.
For example, here ?item for "Введенская церковь (Ольгово)" article shows as empty, while it is in fact linked (Q59641456):

SELECT ?item ?title WHERE {
  SERVICE wikibase:mwapi {
    bd:serviceParam wikibase:endpoint "ru.wikipedia.org" .
    bd:serviceParam wikibase:api "Generator" .
    bd:serviceParam mwapi:generator "search" .
    bd:serviceParam mwapi:gsrsearch "intitle:/Введенская церковь \\(О/" .
    bd:serviceParam mwapi:gsrlimit "max" .
    ?item wikibase:apiOutputItem mwapi:item .
    ?title wikibase:apiOutput mwapi:title
  }
}

Q59641456 was edited at 11 Dec, "Введенская церковь (Ольгово)" last edit at 7 Nov, so further waiting have no sense.

Problematic state can be removed by making an edit to wikidata item, so stable reproducibility is under the risk.

TASK DETAIL

https://phabricator.wikimedia.org/T212084

EMAIL PREFERENCES

https://phabricator.wikimedia.org/settings/panel/emailpreferences/

To: Vort
Cc: Aklapper, Vort, Nandana, Lahi, Gq86, Lucas_Werkmeister_WMDE, GoranSMilovanovic, QZanden, EBjune, merbst, LawExplorer, _jensen, D3r1ck01, Jonas, Xmlizer, jkroll, Smalyshev, Wikidata-bugs, Jdouglas, aude, Tobias1984, Manybubbles, Mbch331

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