More useful debug error message when trying to write a vector attribu…

…te with an invalid QVariant type. Message displayed now looks like this: Invalid variant type for field lon 1: Expected Type float : Received Value: 20.375

git-svn-id: http://svn.osgeo.org/qgis/trunk@14130 c8812cc2-4d05-0410-92ff-de0c093fc19c

src/core/qgsvectorfilewriter.cpp

@@ -32,6 +32,7 @@
 #include <QTextCodec>
 #include <QTextStream>
 #include <QSet>
+#include <QMetaType>
 
 #include <cassert>
 #include <cstdlib> // size_t
@@ -341,7 +342,10 @@ bool QgsVectorFileWriter::addFeature( QgsFeature& feature )
         OGR_F_SetFieldString( poFeature, ogrField, mCodec->fromUnicode( attrValue.toString() ).data() );
         break;
       default:
-        QgsDebugMsg( "Invalid variant type for field " + QString::number( ogrField ) + ": " + QString::number( attrValue.type() ) );
+        QgsDebugMsg( "Invalid variant type for field " + QString( fldIt.value().name() ) + " " 
+            + QString::number( ogrField ) + ": Received Type " + QMetaType::typeName (  attrValue.type() )
+            + " : With Value : " +  attrValue.toString() 
+            );
         return false;
     }
   }