[Qgis-developer] non integer ID and python

[Jürgen E. Fischer]

Hi Denis,

On Wed, 27. Feb 2013 at 07:27:49 +0100, Denis Rouzaud wrote:
> I have a small problem in my quickfinder plugin (finds a feature by its id).

I don't know that plugin.  What does it actually do?


> For postgis layers, I have no problem to find a feature using its id.  
> But, I can't achieve this with shapefiles for example.

Shapefiles don't have a attribute for the the id.   The feature id is simply
the index of the feature in the file.  In QgsExpressions you can use "$id" to
reference the id (also works for postgis) - if that's what's you're after.

Otherwise feeture ids are always integers -  so you can use QgsFeature::id() to
get the id of a feature and use QgsFeatureRequest::setFilterFid() to retrieve a
feature by id.


Jürgen 

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