adding shortid to support deeper trees

Author: angelo0000

lib/tree.js

@@ -1,5 +1,6 @@
 var Schema = require('mongoose').Schema;
 var streamWorker = require('stream-worker');
+var shortId = require('shortid');
 
 module.exports = exports = tree;
 
@@ -28,11 +29,11 @@ function tree(schema, options) {
      */
     schema.add({
         parent: {
-            type: Schema.ObjectId,
+            type: String,
             set: function (val) {
-                return (val instanceof Object && val._id) ? val._id : val;
+                return (val instanceof Object && val._id) ? val._id.toString() : val;
             },
-            index: true
+            unique: true
         },
         path: {
             type: String,

package.json

@@ -20,7 +20,8 @@
   "engine": "node >= 0.4.0",
   "dependencies": {
     "mongoose": "3.x.x",
-    "stream-worker": "0.x.x"
+    "stream-worker": "0.x.x",
+    "shortid": "2.0.0"
   },
   "devDependencies": {
     "async": "0.x.x",