[Qgis-user] Unknown topology of empty WFS layer ?

[Richard McDonnell]

Hi,
Not sure if this is exactly what you are looking for.
Your Layers, Ive no idea what database type you are using, but on 
PostgreSQL/PostGIS you can put in geometry Constraints using

ALTER TABLE public."Table_Name"

and one of the following, depending on what Geometry type you are 
looking at.

ADD CONSTRAINT enforce_geotype_geom CHECK (geometrytype(geom) = 
'MULTIPOLYGON'::text OR geom IS NULL);

ADD CONSTRAINT enforce_geotype_geom CHECK (geometrytype(geom) = 
'POLYGON'::text OR geom IS NULL);

ADD CONSTRAINT enforce_geotype_geom CHECK (geometrytype(geom) = 
'POINT'::text OR geom IS NULL);

ADD CONSTRAINT enforce_geotype_geom CHECK (geometrytype(geom) = 
'LINESTRING'::text OR geom IS NULL);

I hope this helps
Reagrds,

Richard

On 30/06/2017 10:39, Lars I. Nielsen, LIFA A/S wrote:
>
> Hi,
>
> I’m preparing a QGIS project for a customer, and have (among other) 
> three layers with points, lines, and areas respectively.
>
> I’m adapting the project from a previously made project by altering 
> the data connections. The databases are identical in structure, so it 
> works. The layers are all fetched using WFS-T.
>
> So far I only have data in the points and areas layers, none in the 
> lines layer. The lines dataset (table) in the database is present, and 
> published as WFS (Geoserver), and all metadata (afaik) is present 
> (i.e. “geometry_columns”).
>
> I would like to be able to digitize lines into the line layer, but 
> apparently QGIS cannot determine the topology, and (I suppose that’s 
> also why) I can’t add any styles via the “properties” dialog or elsewhere.
>
> Is there any way, that I can tell QGIS that the layer should contain 
> line features ?
>
> And how can I add suitable (line) styles to display the lines without 
> any features present ?
>
> Using 2.18.7 (32+64) Windows
>
> Med venlig hilsen
> *
> *Lars I. Nielsen, LIFA A/S
> GIS-konsulent
>
>
> http://website.lifa.dk/lsp.gif
>
>
> *T*6313 6800 *@ *lin at lifa.dk
> *D *6313 6849 *W *www.lifa.dk
> *M *2492 4866
>
>
>
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-- 
*_Richard McDonnell_*
*GIS Specialist PgD GIS AssocSCSI*
*OPW FRM Data Management*
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