Fix fetching subset of attributes with mssql (fix #14402), add test

qgis · Mar 2, 2016 · 30449e5 · 30449e5
1 parent 527fe9d
commit 30449e5
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Showing 2 changed files with 12 additions and 1 deletion.
diff --git a/src/providers/mssql/qgsmssqlfeatureiterator.cpp b/src/providers/mssql/qgsmssqlfeatureiterator.cpp
@@ -284,7 +284,7 @@ bool QgsMssqlFeatureIterator::fetchFeature( QgsFeature& feature )
     for ( int i = 0; i < mAttributesToFetch.count(); i++ )
     {
       QVariant v = mQuery->value( i );
-      const QgsField &fld = mSource->mFields.at( i );
+      const QgsField &fld = mSource->mFields.at( mAttributesToFetch.at( i ) );
       if ( v.type() != fld.type() )
         v = QgsVectorDataProvider::convertValue( fld.type(), v.toString() );
       feature.setAttribute( mAttributesToFetch.at( i ), v );

diff --git a/tests/src/python/providertestbase.py b/tests/src/python/providertestbase.py
@@ -384,3 +384,14 @@ def testClosedIterators(self):
 
         # Test rewinding closed iterator
         self.assertFalse(f_it.rewind(), 'Rewinding closed iterator successful, should not be allowed')
+
+    def testGetFeaturesSubsetAttributes(self):
+        """ Test that expected results are returned when using subsets of attributes """
+
+        tests = {'pk': set([1, 2, 3, 4, 5]),
+                 'cnt': set([-200, 300, 100, 200, 400]),
+                 'name': set(['Pear', 'Orange', 'Apple', 'Honey', NULL]),
+                 'name2': set(['NuLl', 'PEaR', 'oranGe', 'Apple', 'Honey'])}
+        for field, expected in tests.iteritems():
+            result = set([f[field] for f in self.provider.getFeatures(QgsFeatureRequest().setSubsetOfAttributes([field], self.provider.fields()))])
+            self.assertEqual(result, expected, 'Expected {}, got {}'.format(expected, result))