fix: dont assume array as response

lib/model.js

@@ -1379,9 +1379,12 @@ module.exports = (function() {
 
 
         // Insert all records at once
         // Insert all records at once
         return self.QueryInterface.bulkInsert(self.getTableName(options), records, options, attributes).then(function (results) {
         return self.QueryInterface.bulkInsert(self.getTableName(options), records, options, attributes).then(function (results) {
-          return results.forEach(function (result, i) {
-            daos[i].set(self.primaryKeyAttribute, result[self.rawAttributes[self.primaryKeyAttribute].field], {raw: true});
-          });
+          if (Array.isArray(results)) {
+            results.forEach(function (result, i) {
+              daos[i].set(self.primaryKeyAttribute, result[self.rawAttributes[self.primaryKeyAttribute].field], {raw: true});
+            });
+          }
+          return results;
         });
         });
       }
       }
     }).then(function() {
     }).then(function() {