[stable19] Search also the email and displayname in user mangement for groups

[backportbot-nextcloud]

backport of #21138

[MorrisJobke]

Unfortunately this doesn't seem to go through in stable19. The fix makes sense, but the results are not shown.

A bisect says:

gbs fixed
31519453de62dc698b18ca52b0b239c39e379f4b is the first fixed commit
commit 31519453de62dc698b18ca52b0b239c39e379f4b
Author: Christoph Wurst <christoph@winzerhof-wurst.at>
Date:   Wed Jun 3 15:11:53 2020 +0200

    Bump doctrine/dbal from 2.9.2 to 2.10.2
    
    Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

 3rdparty | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

This is #21208

Nothing we can backport I think. Maybe I can find the cause for it to work.

[MorrisJobke]

This is #21208

Okay - I found it. The doctrine/dbal update from 2.9.2 to 2.10.2 fixed this. Let me check if I can restructure the query.

[MorrisJobke]

I thought that maybe the produced SQL is different, but this does not seem to be the case:

stable19 and master have this:

SELECT `g`.`uid` FROM `*PREFIX*group_user` `g` LEFT JOIN `*PREFIX*users` `u` ON `g`.`uid` = `u`.`uid` LEFT JOIN `*PREFIX*preferences` `p` ON (`p`.`userid` = `u`.`uid`) AND (`p`.`appid` = 'settings') AND (`p`.`configkey` = 'email') WHERE (`gid` = :dcValue1) AND ((LOWER(`g`.`uid`) LIKE LOWER(:dcValue2) ESCAPE '\') OR (LOWER(`u`.`displayname`) LIKE LOWER(:dcValue3) ESCAPE '\') OR (LOWER(`p`.`configvalue`) LIKE LOWER(:dcValue4) ESCAPE '\')) ORDER BY `u`.`uid_lower` ASC LIMIT 25

[MorrisJobke]

It was indeed the fix by @ChristophWurst that makes this work properly: https://github.com/doctrine/dbal/pull/3772/files

[MorrisJobke]

Fix is in nextcloud/3rdparty#486