mongoupdate

db.images.find({}).forEach(function(doc){ 
    var regexp = /(.*)\.[^.]+$/;
    var thumbName = doc.name.split('.').reverse().slice(1);
	db.images.update(
	   {number:doc.number},
	   { $set:
	      	{"path": {
                  "url" : "assets/images/users/" + doc.username + "/pieces/" + doc.number + "/" + doc.name,
                   "thumb": "assets/images/users/" + doc.username + "/pieces/" + doc.number + "/" + thumbName + "_thumb.jpg"}
          	}
       },
	   {upsert:true}
	);
})

db.getCollection('users').update({},{$rename: {"role": "roles"}},false,true)
db.getCollection('images').update({},{$set: {"checked": true}},false,true)