Return last error message for failed nodes on map creation

NEWS.md

@@ -4,7 +4,11 @@
 
 Released 2016-mm-dd
 
+Enhancements:
+ - Return last error message for failed nodes on map creation.
+
 Announcements:
+ - Upgrades camshaft to [0.35.0](https://github.com/CartoDB/camshaft/releases/tag/0.35.0).
  - Upgrades lzma to 2.3.2.
 
 

lib/cartodb/controllers/map.js

@@ -349,13 +349,17 @@ function addAnalysesMetadata(username, layergroup, analysesResults, includeQuery
             nodes: nodes.reduce(function(nodesIdMap, node) {
                 if (node.params.id) {
                     var nodeResource = layergroup.layergroupid + '/analysis/node/' + node.id();
-                    nodesIdMap[node.params.id] = {
+                    var nodeRepr = {
                         status: node.getStatus(),
                         url: getUrls(username, nodeResource)
                     };
                     if (includeQuery) {
-                        nodesIdMap[node.params.id].query = node.getQuery();
+                        nodeRepr.query = node.getQuery();
                     }
+                    if (node.getStatus() === 'failed') {
+                        nodeRepr.error_message = node.getErrorMessage();
+                    }
+                    nodesIdMap[node.params.id] = nodeRepr;
                 }
 
                 return nodesIdMap;