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

[Radim Blazek]

Hi,
very nice that performance test.
I found that nginx was misconfigured an it was transferring unzipped
data over the network. With nginx params:
    gzip on;
    gzip_types text/xml;
    gzip_http_version 1.0;
WFS is now only two times slower than direct connection to PostGIS.
Sorry for false alarm.

Radim

On Mon, Oct 8, 2018 at 3:42 PM Régis Haubourg <regis.haubourg at gmail.com> wrote:
>
> 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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