mongoose findById does not work

Please do not kick much. I study nodejs, express and mongodb. Along the way I try to do everything that is shown in this screencast. But in this place:

app.get('/user/:id', function(req, res, next){ User.findById(req.params.id, function(err, user){ if(err) return next(err); res.json(user); }); }); 

The error falls out:

  Express 500 CastError: Cast to ObjectId failed for value "586f2862632df73c31f25df3" at path "_id" for model "User" at MongooseError.CastError (/home/farex/dev/nodejs_dev/lessons_30/node_modules/mongoose/lib/error/cast.js:26:11) at ObjectId.cast (/home/farex/dev/nodejs_dev/lessons_30/node_modules/mongoose/lib/schema/objectid.js:147:13) at ObjectId.castForQuery (/home/farex/dev/nodejs_dev/lessons_30/node_modules/mongoose/lib/schema/objectid.js:187:15) at cast (/home/farex/dev/nodejs_dev/lessons_30/node_modules/mongoose/lib/cast.js:229:32) at Query.cast (/home/farex/dev/nodejs_dev/lessons_30/node_modules/mongoose/lib/query.js:2752:12) at Query.findOne (/home/farex/dev/nodejs_dev/lessons_30/node_modules/mongoose/lib/query.js:1353:10) at Function.findOne (/home/farex/dev/nodejs_dev/lessons_30/node_modules/mongoose/lib/model.js:1343:13) at Function.findById (/home/farex/dev/nodejs_dev/lessons_30/node_modules/mongoose/lib/model.js:1271:15) at /home/farex/dev/nodejs_dev/lessons_30/app.js:42:8 at callbacks (/home/farex/dev/nodejs_dev/lessons_30/node_modules/express/lib/router/index.js:164:37) at param (/home/farex/dev/nodejs_dev/lessons_30/node_modules/express/lib/router/index.js:138:11) at param (/home/farex/dev/nodejs_dev/lessons_30/node_modules/express/lib/router/index.js:135:11) at pass (/home/farex/dev/nodejs_dev/lessons_30/node_modules/express/lib/router/index.js:145:5) at Router._dispatch (/home/farex/dev/nodejs_dev/lessons_30/node_modules/express/lib/router/index.js:173:5) at Object.router (/home/farex/dev/nodejs_dev/lessons_30/node_modules/express/lib/router/index.js:33:10) at next (/home/farex/dev/nodejs_dev/lessons_30/node_modules/connect/lib/proto.js:174:15) 

It looks like in the new version of mobgoose, something has changed ...