mongoose nested populate code example

Example 1: mongoose iupdate nested

blog.findByIdAndUpdate(entityId, {$set: {'meta.favs': 56}}, function(err, doc) {
    console.log(doc);
});

Example 2: mongodb mongoose document populate nested document

Project.find(query)
    .populate({ 
      path: 'pages',
      populate: [{
       path: 'components',
       model: 'Component'
      },{
        path: 'AnotherRef',
        model: 'AnotherRef',
        select: 'firstname lastname'
      }] 
   })
   .exec(function(err, docs) {});