Showing with 10 additions and 2 deletions.
  1. +10 −2 src/core/symbology-ng/qgsgraduatedsymbolrendererv2.cpp
12 changes: 10 additions & 2 deletions src/core/symbology-ng/qgsgraduatedsymbolrendererv2.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -192,7 +192,11 @@ QgsSymbolV2* QgsGraduatedSymbolRendererV2::symbolForFeature( QgsFeature& feature
return NULL;
}

// find the right category
// Null values should not be categorized
if ( attrs[mAttrNum].isNull() )
return NULL;

// find the right category
QgsSymbolV2* symbol = symbolForValue( attrs[mAttrNum].toDouble() );
if ( symbol == NULL )
return NULL;
Expand Down Expand Up @@ -802,8 +806,12 @@ QgsGraduatedSymbolRendererV2* QgsGraduatedSymbolRendererV2::createRenderer(
lst.append( attrNum );

QgsFeatureIterator fit = vlayer->getFeatures( QgsFeatureRequest().setFlags( QgsFeatureRequest::NoGeometry ).setSubsetOfAttributes( lst ) );

// create list of non-null attribute values
while ( fit.nextFeature( f ) )
values.append( f.attribute( attrNum ).toDouble() );
if ( !f.attribute( attrNum ).isNull() )
values.append( f.attribute( attrNum ).toDouble() );

// calculate the breaks
if ( mode == Quantile )
{
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