fix when casting null

Author: mathieudutour

Diff for: History.md

@@ -1,3 +1,7 @@
+3.0.6 / 2016-07-11
+==================
+  - Fix when casting `null`
+
 3.0.5 / 2016-07-11
 ==================
   - Fix when updating with `0`

Diff for: lib/util.js

@@ -13,7 +13,7 @@ exports.cast = function cast (obj) {
     return obj.map(cast)
   }
 
-  if (typeof obj === 'object') {
+  if (obj && typeof obj === 'object') {
     Object.keys(obj).forEach(function (k) {
       if (k === '_id') {
         if (obj._id.$in) {

Diff for: package.json

@@ -1,6 +1,6 @@
 {
   "name": "monk",
-  "version": "3.0.5",
+  "version": "3.0.6",
   "main": "lib/monk.js",
   "tags": [
     "mongodb",

Diff for: test/casting.js

@@ -87,3 +87,15 @@ test('should cast nested ids', (t) => {
   const oid = monk.id(cast.$pull.items[0]._id)
   t.is(oid.toHexString(), '4ee0fd75d6bd52107c000118')
 })
+
+test('should not fail when casting 0', (t) => {
+  const cast = monk.util.cast(0)
+
+  t.is(cast, 0)
+})
+
+test('should not fail when casting null', (t) => {
+  const cast = monk.util.cast(null)
+
+  t.is(cast, null)
+})