MongoDB and nodejs, find throught list of ids

Question

MongoDB and nodejs, find throught list of ids

I have two collections: users:

{
  _id: ObjectId('123...'),
  docs: [
    ObjectId('512d5793abb900bf3e000002'),
    ObjectId('512d5793abb900bf3e000001')
  ]
}

docs:

{
  _id: ObjectId('512d5793abb900bf3e000002'),
  name: 'qwe',
  ...
}
{
  _id: ObjectId('512d5793abb900bf3e000001'),
  name: 'qwe2',
  ...
}

I want to get docs from ids. I try this solution, but I get this message:

{ db: { domain: null, _events: {}, _maxListeners: 10, databaseName: 'test', ...

javascript
node.js
mongodb

Answer 1

Your message looks like a mongodb cursor returned from find by native mongodb driver.

To get actual data you should use toArray function of the cursor:

var ObjectID = require('mongodb').ObjectID;
// you shall wrap each id in ObjectID
var idsProjects = [
  ObjectID('512d5793abb900bf3e000002'),
  ObjectID('512d5793abb900bf3e000001')
];
collectionProjects.find({
  _id: { $in: idsProjects }
},{
  _id: -1, // use -1 to skip a field
  name: 1
}).toArray(function (err, docs) {
  // docs array here contains all queried docs
  if (err) throw err;
  console.log(docs);
});

But I recommend you to switch from native mongodb driver to some wrapper around it like monk.