Hi Thomas,

> On 8 Feb 2017, at 14:33, Thomas Mortagne <[email protected]> wrote:
> 
> Hi devs,
> 
> We have a unintended regression in the standard import: if what you
> import is identical to what is already in the database (including the
> author) it won't add a new version (if you use the default option "Add
> a new version to the existing page").
> 
> What happen in practice is that if you keep calling XWikiDocument#set*
> methods with the same data it won't update the metadata or content
> dirty flags. This flags are what hibernate store look at to know if it
> should add a new version or not.
> 
> You can reproduce the same behavior with a simple script which load a
> document, always set the same content and save. You will notice that
> the history of that document does not change.
> 
> So the question is do we force metadata dirty to true all the time in
> the instance output filter or do we keep this feature (in which case
> we should optimize it a bit to not do the useless XWiki#saveDocument
> but that's another subject).
> 
> WDYT ?
> 
> It could be seen as a nice feature but in practice my first reaction
> was WTF and you often want to be sure the import actually did
> something so I'm +1 to force metadata dirty. But I'm +0 to keep the
> current behavior if there is a majority for it.

It’s hard to decide...

Same as you, I also thought it was a nice feature when I learnt that this was 
what was happening :)

Actually something I’ve always wanted was to avoid generating new revisions 
when users edit a page and click save without changing any content instead of 
clicking cancel (a lot of users do this, generating unnecessary revisions and 
when you’re the owner of a wiki, it’s a pain to check the diffs to find out 
that there was no changes). But this could be a feature implemented at the 
level of the editor save button I guess. It’s a bit different since the author 
would be different but we wouldn’t want a save in this case.

So I’m +0 for both behaviours with a slight preference toward forcing a rev to 
be created.

Thanks
-Vincent

> -- 
> Thomas Mortagne

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