foursquare/fongo — pull request #69 by twillouer (2013-08-06 21:26:06+00:00)
Title: _id must go first + test for updating accross indexes

Hi,

MongoDB store _id first when inserting values :

```javascript
connecting to: test
> db.fongo.remove();
> db.fongo.insert({date:1, _id:1})
> db.fongo.find();
{ "_id" : 1, "date" : 1 }
```

+ one test to check if update works againts indexes.