Re: [Wikidata-tech] Does a rollback also roll back revision history?

[Eric Scott]

My apologies. I was looking at the wrong Q-number for revision. The 
pertinent Q-number to check here was 
https://www.wikidata.org/w/index.php?title=Q4925477=history (The 
name "John"). My mistake.




On 07/31/2017 08:37 AM, Daniel Kinzler wrote:

Am 31.07.2017 um 17:01 schrieb Eric Scott:

* Is is indeed the case that rollbacks also roll back the revision history?

No. All edits are visible in the page history, including rollback, revert,
restore, undo, etc. The only kind of edit that is not recorded is a "null edit"
- an edit that changes nothing compared to the previous version (so it's not
actually an edit). This is sometimes used to rebuild cached derived data.


* Is there some other place we could look that records such rollbacks?

No. The page history is authoritative. It reflects all changes to the page
content. If you could find a way to trigger this kind of behavior, that would be
a HUGE bug. Let us know.

Note that for wikitext content, this doesn't mean that it contains all changes
to the visible rendering: when a transcluded template is changed, this changes
the rendering, but is not visible in the page's history (but it is instead
visible in the template's history). However, no transclusion mechanism exists
for Wikidata entities.




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Re: [Wikidata-tech] Does a rollback also roll back revision history?

[Daniel Kinzler]

Am 31.07.2017 um 17:01 schrieb Eric Scott:
> * Is is indeed the case that rollbacks also roll back the revision history?

No. All edits are visible in the page history, including rollback, revert,
restore, undo, etc. The only kind of edit that is not recorded is a "null edit"
- an edit that changes nothing compared to the previous version (so it's not
actually an edit). This is sometimes used to rebuild cached derived data.

> * Is there some other place we could look that records such rollbacks?

No. The page history is authoritative. It reflects all changes to the page
content. If you could find a way to trigger this kind of behavior, that would be
a HUGE bug. Let us know.

Note that for wikitext content, this doesn't mean that it contains all changes
to the visible rendering: when a transcluded template is changed, this changes
the rendering, but is not visible in the page's history (but it is instead
visible in the template's history). However, no transclusion mechanism exists
for Wikidata entities.

-- 
Daniel Kinzler
Principal Platform Engineer

Wikimedia Deutschland
Gesellschaft zur Förderung Freien Wissens e.V.

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Re: [Wikidata-tech] Does a rollback also roll back revision history?

[Lydia Pintscher]

On Mon, Jul 31, 2017 at 5:01 PM, Eric Scott  wrote:
> Hi all -
>
> We've noticed that periodically the contents of WD will change quite
> significantly from time to time, and then change back again, without it
> being reflected in the change history of the affected items. Here's an
> example from last weekend.
>
> https://www.wikidata.org/wiki/Q998698 (John Kerr - British composer and
> musician)
>
> At one point he seems to have had this assertion in our local stand-alone
> copy of WD:
>
>  GIVEN_NAME:Roberto está bien guapo
>
> This assertion is now gone, and there is no record of it in the revision
> history for this Q number.
>
> This would be explainable if this proved to be a case of vandalism or
> something and the https://www.mediawiki.org/wiki/API:Rollback was invoked,
> PROVIDED the rollback operation also rolls back the revision history.
>
> Questions:
>
> * Is is indeed the case that rollbacks also roll back the revision history?
>
> * Is there some other place we could look that records such rollbacks?

Hi Erik,

Rollbacks and undos do get recorded in the revision history of an item
as a regular edit. Here is a rollback I just did on the sandbox item:
https://www.wikidata.org/w/index.php?title=Q4115189=529556595=529556552
Not sure what is causing the issue you saw.


Cheers
Lydia

-- 
Lydia Pintscher - http://about.me/lydia.pintscher
Product Manager for Wikidata

Wikimedia Deutschland e.V.
Tempelhofer Ufer 23-24
10963 Berlin
www.wikimedia.de

Wikimedia Deutschland - Gesellschaft zur Förderung Freien Wissens e. V.

Eingetragen im Vereinsregister des Amtsgerichts Berlin-Charlottenburg
unter der Nummer 23855 Nz. Als gemeinnützig anerkannt durch das
Finanzamt für Körperschaften I Berlin, Steuernummer 27/029/42207.

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