fix: attributeMap should be object not array, fixed #2778

lib/dialects/abstract/query-generator.js

@@ -290,7 +290,7 @@ module.exports = (function() {
       var query
       var query
         , values = []
         , values = []
         , outputFragment
         , outputFragment
-        , modelAttributeMap = [];
+        , modelAttributeMap = {};
 
 
       query = 'UPDATE <%= table %> SET <%= values %><%= output %> WHERE <%= where %>';
       query = 'UPDATE <%= table %> SET <%= values %><%= output %> WHERE <%= where %>';