[QGIS-Developer] Processing Split with lines algorithm broken

[Nathan Woodrow]

IMO go with the principle of least astonishment.  I think the expected
outcome is single part features as it's not clear that you need to run
another step.

- Nathan

On Wed, Nov 15, 2017 at 2:48 PM, Nyall Dawson <nyall.dawson at gmail.com>
wrote:

> On 15 November 2017 at 00:33, matteo <matteo.ghetta at gmail.com> wrote:
> > Hi devs,
> >
> > the algorithm Split with lines seems not working. No output error but
> > both lines or polygons in output are not split. The same algorithm with
> > the same data works in QGIS 2.18
>
> I suspect it's working OK, but you're hitting a change in 3.0 where
> the output of this algorithm is a multi-line, with the individual
> split parts still forming a single feature. You need to run multiparts
> to singleparts on it afterward.
>
> ....However....
>
> This was a change I requested in
> https://github.com/qgis/QGIS/pull/3798, since it seemed like a logical
> move. Having used this algorithm extensively since (and also been
> confused in thinking that the algorithm was broken!) I'm not convinced
> this was the right move anymore, and think that we should probably
> always output single-part features from this algorithm.
>
> What's everyone's thoughts?
>
> Nyall
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