bool QgsMemoryProvider::deleteAttributes( const QgsAttributeIds& attributes )
{
QList<int> attrIdx = attributes.toList();
qSort( attrIdx.begin(), attrIdx.end(), qGreater<int>() );
// delete attributes one-by-one with decreasing index
for ( QList<int>::const_iterator it = attrIdx.constBegin(); it != attrIdx.constEnd(); ++it )
{
int idx = *it;
mFields.remove( idx );
for ( QgsFeatureMap::iterator fit = mFeatures.begin(); fit != mFeatures.end(); ++fit )
{
QgsFeature& f = fit.value();
QgsAttributes attr = f.attributes();
attr.remove( idx );
f.setAttributes( attr );
}
}
return true;
}
void QgsVectorLayerEditBuffer::updateChangedAttributes( QgsFeature &f )
{
QgsAttributes attrs = f.attributes();
// remove all attributes that will disappear - from higher indices to lower
for ( int idx = mDeletedAttributeIds.count() - 1; idx >= 0; --idx )
{
attrs.remove( mDeletedAttributeIds[idx] );
}
// adjust size to accommodate added attributes
attrs.resize( attrs.count() + mAddedAttributes.count() );
// update changed attributes
if ( mChangedAttributeValues.contains( f.id() ) )
{
const QgsAttributeMap &map = mChangedAttributeValues[f.id()];
for ( QgsAttributeMap::const_iterator it = map.begin(); it != map.end(); ++it )
attrs[it.key()] = it.value();
}
f.setAttributes( attrs );
}