fix data retrieval in attribute table from geometryless spatialite tables

Author: jef-n

src/gui/attributetable/qgsattributetablemodel.cpp

@@ -646,4 +646,6 @@ void QgsAttributeTableModel::prefetchColumnData( int column )
 void QgsAttributeTableModel::setRequest( const QgsFeatureRequest& request )
 {
   mFeatureRequest = request;
+  if( layer() && !layer()->hasGeometryType() )
+    mFeatureRequest.setFlags( mFeatureRequest.flags() | QgsFeatureRequest::NoGeometry );
 }

src/providers/spatialite/qgsspatialitefeatureiterator.cpp

@@ -145,7 +145,10 @@ bool QgsSpatiaLiteFeatureIterator::close()
 bool QgsSpatiaLiteFeatureIterator::prepareStatement( QString whereClause )
 {
   if ( !( mRequest.flags() & QgsFeatureRequest::NoGeometry ) && P->mGeometryColumn.isNull() )
+  {
+    QgsMessageLog::logMessage( QObject::tr( "Trying to fetch geometry on a layer without geometry." ), QObject::tr( "SpatiaLite" ) );
     return false;
+  }
 
   try
   {