[Qgis-developer] Query Set using SetSubstring does not return record - resolved but with a question

[maaza mekuria]

Let me lay bare my hearts desire, is it alright to have a method that updates the selection set using the setSubString query? What is the reason that such a powerful way to query the data does not also have a means to update the selection set?

I know I am pushing my luck or my providence. But God is generous to the rich as well as to the poor and I am told to ask always and I am sure there will be answer soon. Or am I talking only to myself here?

Maaza

--- On Wed, 6/8/11, maaza mekuria <sailmcm at yahoo.com> wrote:

> From: maaza mekuria <sailmcm at yahoo.com>
> Subject: Re: [Qgis-developer] Query Set using SetSubstring does not return record
> To: "QGIS Developer" <qgis-developer at lists.osgeo.org>
> Date: Wednesday, June 8, 2011, 5:43 PM
> I figured it out. I was assuming that
> the setSubsetString would do the querying and update the
> selection set, but I gather now after a few hours of
> hardwork that is not its purpose, it just limits the
> accessible features with out changing the selection set. 
> 
> How can I help update the documentation to reflect what the
> methods are meant to do?
> 
> Thank you,
> 
> Maaza  
> 
> --- On Wed, 6/8/11, maaza mekuria <sailmcm at yahoo.com>
> wrote:
> 
> > From: maaza mekuria <sailmcm at yahoo.com>
> > Subject: [Qgis-developer] Query Set using SetSubstring
> does not return record
> > To: "QGIS Developer" <qgis-developer at lists.osgeo.org>
> > Date: Wednesday, June 8, 2011, 2:25 PM
> >        
> > 
> >             
> > I have a subsetstring query applied in code to the
> layer
> > data. Yet I find that it does not return any records
> that it
> > should have
> >  located.
> > 
> > 
> > The code is pasted below, the setSubsetString passes
> and
> > yet the selected feature count is 0. What am I
> missing
> > here?
> > 
> >                //Query the edge table edge
> field
> > to find the two vertices 
> >                strQryEdge = "EDGEID=" +
> > fld0.toString() + ""; 
> >                if
> > (inEdgeVectorProvider->supportsSubsetString()) 
> >                {
> >                 
> >
>  blnQryCur=inEdgeVectorLayer->setSubsetString(strQryEdge);
> >                   if (blnQryCur) 
> >                   {
> >  
> >                      lstEdgeFeats =
> > inEdgeVectorLayer->selectedFeatures();
> >                      txtStream <<
> "
> > Recount - "<<lstEdgeFeats.count()<<endl;
> >                   } // if network source
> query
> > returns edge result
> >                } // if edge provider
> supports
> > query subst
> > 
> > 
> > Thank you,
> > 
> > Maaza
> > 
> > _______________________________________________
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> >
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