[QGIS-Developer] [Qgis-developer] QGIS <-> Django

[Régis Haubourg]

Hi Radim,
I have no idea why it is slower, but we should really improve the QGIS
server WFS-T situation I think. Adding  scenario to the QGIS performance
tests would be a good solution to track this and then seek for the
bottlenecks:

http://test.qgis.org/perf_test/graffiti/

Cheers
Régis

Le lun. 8 oct. 2018 à 15:27, Radim Blazek <radim.blazek at gmail.com> a écrit :

> Hi, thanks for information.
>
> I tried QGIS <-> WFS-T <-> QGIS Server <-> PostGIS and initial read is
> 4-5 times slower than QGIS <-> PostGIS (QGIS 2.14). Any idea why it is
> so slow and if it can be improved?
>
> Radim
>
> On Fri, Oct 5, 2018 at 10:54 PM Olivier Dalang <olivier.dalang at gmail.com>
> wrote:
> >
> > Hi Radim,
> >
> > I didn't get this sorted in the end (ended just having the layer as read
> only in QGIS from postgis and users would do any modification from django
> admin).
> >
> > About a Django provider for QGIS : it is now possible to create python
> providers [1]. So creating a REST provider to consume a django rest
> framework endpoint may not be that hard anymore ? That would certainly be a
> great addition to QGIS !!
> >
> > And about a WFS-T app for Django : I don't know of any other effort than
> django-wfs, but I just saw there's an open PR with some a lot of changed
> including python 3 support, so maybe django-wfs is not as dead as it looks
> ? Still WFS-T would have to be added, and again not sure how hard this
> would be...
> >
> > Let us know how it goes !
> >
> > Cheers,
> >
> > Olivier
> >
> > [1] https://github.com/qgis/QGIS/pull/7012
> >
> >
> >
> > On Sat, Oct 6, 2018 at 4:24 AM Radim Blazek <radim.blazek at gmail.com>
> wrote:
> >>
> >> Hi,
> >> we need the same, to be precise, we need two things, to allow editing
> >> of data stored in Django/PostGIS in QGIS over the network and let QGIS
> >> Server (WMS) to read data from Django, both using Django filters etc.
> >> If we manage to get data to QGIS from Django (and back), we can use
> >> QGIS Server and WFS-T for editing. So I am looking for something like
> >> Django provider for QGIS or WFS-T application for Django. Are you
> >> aware of something like that?
> >>
> >> Olivier, what have you used in the end? [1] is not maintained and it
> >> does not support WFS-T.
> >>
> >> Alessandro, in [2] I am missing data reading from Django models. It
> >> seems like the server is launched from python, but data flow goes
> >> through standard QGIS providers?
> >>
> >> Marco, if I got it looking briefly into GeoNode code, they just run
> >> QGIS server, but they don't read data directly from Django models,
> >> right?
> >>
> >> [1] https://github.com/vascop/django-wfs
> >> [2] http://www.itopen.it/qgis-server-binding-news/lang-pref/en/
> >>
> >> Radim
> >>
> >> On Fri, Mar 24, 2017 at 1:56 PM Marco Bernasocchi <marco at opengis.ch>
> wrote:
> >> >
> >> > Hi Olivier
> >> > Kartoza has been working on having geonode server running smoothly
> using
> >> > a qgis server in the background.
> >> >
> >> > have a look at
> >> > https://www.youtube.com/watch?v=GzX4byPkV3E
> >> >
> http://osgeo-org.1560.x6.nabble.com/New-Geonode-GeoSAFE-and-QGIS-work-td5303864.html
> >> >
> >> > cheers
> >> > Marco
> >> >
> >> > On 24.03.2017 13:10, Olivier Dalang wrote:
> >> > > Dear List,
> >> > >
> >> > > Does anybody here have some experience with making QGIS work with
> >> > > (Geo)Django ?
> >> > >
> >> > > I would love to be able to make them communicate, as QGIS is the
> >> > > interface of choice to do complex work on geometries and Django is
> >> > > perfect to quickly setup a complete endpoint with user management,
> model
> >> > > logic and web administration interface.
> >> > >
> >> > > I see two approches :
> >> > > - Using Django REST framework to create a REST endpoint - but is
> there a
> >> > > way to consume REST endpoints in QGIS ?
> >> > > - Developing a WFST module for Django, for which there seem to be
> some
> >> > > work done [1] for the non-transactionnal part.
> >> > >
> >> > > I just wanted to ask before reinventing the wheel !
> >> > >
> >> > > Bests,
> >> > >
> >> > > Olivier
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