fix for #2726 labels no labels in mapserverexport

git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@13708 c8812cc2-4d05-0410-92ff-de0c093fc19c

python/plugins/mapserver_export/ms_export.py

@@ -589,18 +589,24 @@ def writeMapLayers(self):
           layer_def += "    MINSCALE " + minscale + "\n"
         if maxscale > '':
           layer_def += "    MAXSCALE " + maxscale + "\n"
-
-
       # Check for label field (ie LABELITEM) and label status
       try:
-        labelOn    = lyr.getElementsByTagName(     "label")[0].childNodes[0].nodeValue.encode('utf-8')
-        labelField = lyr.getElementsByTagName("labelfield")[0].childNodes[0].nodeValue.encode('utf-8')
-        if labelField != '' and labelField is not None and labelOn == "1":
+        labelElements = lyr.getElementsByTagName("label")
+        labelOn = '0'
+        labelField = None
+        # there are actually 3 different label-element in a layer element:
+        for element in labelElements:
+            labelParent = element.parentNode.localName
+            if labelParent == 'maplayer':
+                labelOn = element.childNodes[0].nodeValue.encode('utf-8')
+            if labelParent == 'labelattributes':
+                labelField = element.getAttribute('fieldname').encode('utf-8')
+        if labelField != '' and labelField is not None and labelOn == "1" and labelOn is not None:
           layer_def += "    LABELITEM '" + labelField + "'\n"
       except:
         # no labels
         pass
-      
+
       # write the CLASS section for rendering
       # First see if there is a single symbol renderer
       if lyr.getElementsByTagName("singlesymbol").length > 0: