How to query mongodb with DBRef

Question

suppose I have the following datastructure:

var user = {_id: \'foo\', age: 35};
var post = {_id: \'...\', author: {$ref: user, $id: \'foo\'},...};
         


        

Answer 1

This db.post.find('author.$id': 'foo') has missing the {}, so the correct sentence is:

db.post.find({'author.$id': 'foo'})

Also this can be achieved with:

db.post.find({'author': DBRef("user", ObjectId('foo'))})

But is more compact and practical the first way.