[Qgis-user] Saving a polygon in QGis before to edit it

[Enrico Ferreguti]

mmm... sorry, debug infos left in the code....
simply remove line 142 (the last) of file "/Users/didier/.qgis2/python/
plugins/layerVersion/layerversion.py"
with a text editor and reload the plugin.

Regards.
Enrico

2015-07-20 13:05 GMT+02:00 Matthias Kuhn <matthias at opengis.ch>:

>  Hi,
>
> I remember geogig (formerly geogit) offers promising concepts for
> filebased spatial data management with historization and branching.
> Unfortunately I don't know the current status of the project and the
> progress of integration in QGIS.
>
> Matthias
>
>
> On 07/20/2015 11:25 AM, Neumann, Andreas wrote:
>
> Hi Didier,
>
> I don't think that anyone is working on a client-side historisation option
> in QGIS. And there wasn't much demand for that in the past, since most
> serious GIS data resides in databases.
>
> Andreas
>
> On 2015-07-20 09:45, didier peeters wrote:
>
> Hello Andreas,
>
> yes it's for some 'historisation', more precisely to make a filiation, and
> yes I certainly will use triggers in PostGIS.  But I wanted to avoid
> confusion between different kind of edition operations that I'm not
> currently foreseeing; I'm not sure it will always be easy to distinct this
> specific action from others.  And I thought that it might also be
> interesting outside of the database world, to have that "edit and preserve"
> operation.
>
>    Didier
>
>  Le 20 juil. 2015 à 09:10, Neumann, Andreas <a.neumann at carto.net> a écrit
> :
>
> Hi Didier,
>
> Is this for historisation purposes? If yes, I would look into database
> solutions to do historization.
>
> The SQL-MM standard has this as a built-in tool set for databases,
> however, PostgreSQL does not implement this part of the SQL specification
> (I believe the latest versions of SQL server and Oracle 12 does). However,
> you can simulate the same in Postgis, using triggers and rules.
>
> Andreas
>
> On 2015-07-20 08:00, didier peeters wrote:
>
> Hello,
>
> I would like to find the best solution to the following case:
>
> in QGis, when editing a polygon (splitting it in 2 parts) I need to save
> the original shape, in order to keep the different steps of its evolution;
> this operation is likely to be repeated several times.  The solution I
> found is to
>
>    - start by copying the polygon,
>    - then edit it (split)
>    - then pasting back the original one,
>    - then adjust and update the attributes of the 2 new polygons.
>
>
>  Is there a less tricky way to achieve this ?
>
> If not it would be nice to have an option in the save dialog (with a
> default behaviour set in the Settings), and I would file a feature request.
>
>
> Didier
>
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