All search-keywords can be prefixed with a - to subtract it's results from the results of the other search parameters (negative). So should deepcategory behave.
Instead currently deepcategory:"foo" -deepcategory:"bar" is a synonym for deepcategory:"foo" deepcategory:"bar" i.e. it searches for articles that are in both categories "bar" and "foo".
| Subject | Repo | Branch | Lines +/- | |
|---|---|---|---|---|
| Keyword aliases should support negation | mediawiki/extensions/CirrusSearch | master | +83 -3 |
I suspect this needs more general solution for negating keywords. I thought it should work OOB by filters configuration, but maybe something is wrong there. @dcausse do you know if it's supposed to work?
Yes it's supposed to work, @MichaelSchoenitzer_WMDE do you have a specific example to share?
Searching for [[ https://en.wikipedia.org/w/index.php?search=deepcat%3A"Lemurs"+-deepcat%3A"Subfossil+lemurs"&title=Special:Search&profile=default&fulltext=1 | deepcat:"Lemurs" -deepcat:"Subfossil lemurs" ]] returns different results than [[ https://en.wikipedia.org/w/index.php?search=deepcat%3A"Lemurs"+deepcat%3A"Subfossil+lemurs"&title=Special:Search&profile=default&fulltext=1 | deepcat:"Lemurs" deepcat:"Subfossil lemurs" ]].
This is the example I tested: [[ https://de.wikipedia.org/w/index.php?search=deepcategory%3A%22Friedhof+in+K%C3%B6ln%22+-deepcategory%3A%22J%C3%BCdische+Trauerhalle+in+Deutschland%22&title=Spezial:Suche&profile=advanced&fulltext=1&advancedSearch-current=%7B%22namespaces%22%3A%5B%220%22%5D%7D&ns0=1&searchToken=6yxr52xcaltx0i9yk1o39am2u | deepcategory:"Friedhof in Köln" -deepcategory:"Jüdische Trauerhalle in Deutschland" ]] (on dewiki).
It will find only the one page in both categories but none of the categories in all of the first but not the second category (should return 20 results).
Indeed there seem to be a weird bug, searching for deepcat:"Friedhof in Köln" -deepcat:"Jüdische Trauerhalle in Deutschland" works properly.
deepcategory is an alias to deepcat so I bet there is something weird going on with negation and keyword aliases.
I'll look into it. Thanks!
Change 429844 had a related patch set uploaded (by DCausse; owner: DCausse):
[mediawiki/extensions/CirrusSearch@master] Keyword aliases should support negation
Change 429844 merged by jenkins-bot:
[mediawiki/extensions/CirrusSearch@master] Keyword aliases should support negation