[Qgis-developer] [Solved] Python: change query of PostGIS layer
bernhard.stroebl at jena.de
Thu May 3 05:19:08 PDT 2012
yes I often have to check several classes to find a certain api
functionality (and sometimes I do not find it). No idea how to improve this.
Am 03.05.2012 11:54, schrieb Ian Packham:
> Thanks Martin
> Bernhard - I don't think your problem is unique - I have also been
> trying to do the same thing and spent a long time looking through the
> docs (particularly the API for QgsVectorLayer) to find the solution. I
> think one problem is that I was looking for something like "Query" as in
> the qgis layer, but it is named differently in the docs.
> Now I am looking to make a layer invisible (i.e. click the cross next to
> the layer in qgis, but keep the layer). Again I am finding it difficult
> - maybe set in the MapCanvas or Registry?
this is in QgsLegendInterface: setLayerVisible
> > Dear Martin,
> > yes that works. I must have been blindfold, thanks for pointing
> > it out to me!
> > Bernhard
> > Am 02.05.2012 23:11, schrieb Martin Dobias:
> > >On Mon, Apr 30, 2012 at 1:10 PM, Bernhard Ströbl
> > ><bernhard.stroebl at jena.de> wrote:
> > >>Hi list,
> > >>
> > >>I am trying to change the query of an already loaded PostGIS
> > layer from
> > >>within a plugin. Same as if I right-clicked on the layer,
> > chose "Query..."
> > >>and entered a WHERE clause there.
> > >
> > >That should be as simple as:
> > >>>>vlayer.setSubsetString("category = 3")
> > >
> > >Martin
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