refactor(internals) Only recurse on plain object in mapOptionFieldNames. Closes #4596

changelog.md

@@ -10,6 +10,7 @@
 - [FIXED] Include all with scopes [#4584](https://github.com/sequelize/sequelize/issues/4584)
 - [INTERNALS] Corrected spelling seperate -> separate
 - [ADDED] Added `include` and `exclude` to `options.attributes`. [#4074](https://github.com/sequelize/sequelize/issues/4074)
+- [FIXED/INTERNALS] Only recurse on plain objects in `mapOptionFieldNames`. [#4596](https://github.com/sequelize/sequelize/issues/4596) 
 
 # 3.10.0
 - [ADDED] support `search_path` for postgres with lots of schemas [#4534](https://github.com/sequelize/sequelize/pull/4534)

lib/utils.js

@@ -111,7 +111,7 @@ var Utils = module.exports = {
       });
     }
 
-    if (options.where) {
+    if (options.where && _.isPlainObject(options.where)) {
       var attributes = options.where
         , attribute
         , rawAttribute;
@@ -132,14 +132,19 @@ var Utils = module.exports = {
 
           if (Array.isArray(attributes[attribute])) {
             attributes[attribute] = attributes[attribute].map(function (where) {
-              return Utils.mapOptionFieldNames({
-                where: where
-              }, Model).where;
+              if (_.isPlainObject(where)) {
+                return Utils.mapOptionFieldNames({
+                  where: where
+                }, Model).where;
+              }
+
+              return where;
             });
           }
         }
       }
     }
+
     return options;
   },