[Wikidata-bugs] [Maniphest] [Triaged] T230588: Wikidata Query Service visualization with embedding gives error

[Lucas_Werkmeister_WMDE]

Lucas_Werkmeister_WMDE added subscribers: Moebeus, Smalyshev, 
Lucas_Werkmeister_WMDE.
Lucas_Werkmeister_WMDE triaged this task as "High" priority.
Lucas_Werkmeister_WMDE added a comment.


  Those errors usually happen when the query returns 0 results and the 
visualization is not able to handle it, and that seems to be what’s happening.
  
  @Moebeus also reported on Telegram that there are lots of broken “distinct 
values” constraint violations, e. g. on Donald Trump 
<https://www.wikidata.org/wiki/Q22686>’s subreddit, that the value is also 
present on “P28228919 (Deleted Property)”. In fact, the value is present on 
//Q//28228919, the dedicated item for r/The_Donald.
  
  F30041457: Screenshot_2019-08-16 Donald Trump.png 
<https://phabricator.wikimedia.org/F30041457>
  F30041458: Screenshot_2019-08-16 r The_Donald.png 
<https://phabricator.wikimedia.org/F30041458>
  
  And the “cats” example query returns 0 results:
  
    SELECT ?item ?itemLabel WHERE {
      ?item wdt:P31 wd:Q146.
      SERVICE wikibase:label { bd:serviceParam wikibase:language 
"[AUTO_LANGUAGE],en". }
    }
  
  However, after changing `Q146` to `P146`, it returns the usual 142 results 
(CC, Mrs. Chippy, F. D. C. Willard, etc.):
  
    SELECT ?item ?itemLabel WHERE {
      ?item wdt:P31 wd:Q146.
      SERVICE wikibase:label { bd:serviceParam wikibase:language 
"[AUTO_LANGUAGE],en". }
    }
  
  @Smalyshev it looks like the query service is mixing up P- and Q-IDs, 
somehow? Were there any recent changes to the internal vocabulary?

TASK DETAIL
  https://phabricator.wikimedia.org/T230588

EMAIL PREFERENCES
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To: Lucas_Werkmeister_WMDE
Cc: Lucas_Werkmeister_WMDE, Smalyshev, Moebeus, Aklapper, Fnielsen, 
darthmon_wmde, DannyS712, Nandana, Lahi, Gq86, GoranSMilovanovic, QZanden, 
EBjune, merbst, LawExplorer, _jensen, rosalieper, Jonas, Xmlizer, jkroll, 
Wikidata-bugs, Jdouglas, aude, Tobias1984, Manybubbles, Mbch331

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