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I have a QGIS project with some layers without geometry. I develop a QGIS plugin. I want to get all my layers by:

iface.mapCanvas().layers()

but I get only layers with geometry. How I can get layers without geometry?

My no-geometry layers are just tables in a database. I could connect to the database in order to access data but I would like to know whether it is possible to access them as QGIS layers (in analogous way to QgsVectorLayers).

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You don't say what version of QGIS you are using, but the method you describe works for PostGIS data at both QGIS 1.8 and the latest development version. –  gsherman Sep 4 '13 at 0:50
    
@gsherman I use QGIS 1.8 but I can't get no-geometry layers from iface.mapCanvas().layers(). How I can get them without connecting directly to a database? –  tomto Sep 4 '13 at 5:41
    
@tomto try to post somewhere one of these "layers" without geometry to download (I never see one...), I would like to try. –  G M Sep 9 '13 at 12:38

1 Answer 1

up vote 1 down vote accepted

Do not use iface.mapCanvas().layers().

Use QgsMapLayerRegistry.instance().mapLayers() instead.

QgsMapLayerRegistry contains all layers from current QGIS project - also layers without geometry.

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