Re: MongoDB Node.JS Driver: count of removed records

[Osmar Olivo]

Can you post your code? Or at least the remove command?

Also, in the options part of the remove call are you running with {safe: true}. In order for callbacks to work, you need to wait for a response from the server, and thus must be running using safe mode.

On Sunday, September 30, 2012 1:38:43 PM UTC-4, Emlyn Murphy wrote:

Hello all,

In the "MongoDB Node.JS Driver" manual here:

http://mongodb.github.com/node-mongodb-native/markdown-docs/collections.html

In the "removing records from collections" section, it states that:

"callback callback function that gets two parameters - an error object (if an error occured) and the count of removed records"

However, when I successfully remove records, I get "undefined" for both parameters to the callback.  Is there something I'm missing?

Thanks,

Emlyn

[Kilian Ciuffolo]

Same thing here.

If you copy/paste the example (and you correct the typo) the callback assertion throws.

var Db = require('mongodb').Db,

    MongoClient = require('mongodb').MongoClient,

    Server = require('mongodb').Server,

    ReplSetServers = require('mongodb').ReplSetServers,

    ObjectID = require('mongodb').ObjectID,

    Binary = require('mongodb').Binary,

    GridStore = require('mongodb').GridStore,

    Grid = require('mongodb').Grid,

    Code = require('mongodb').Code,

    BSON = require('mongodb').pure().BSON,

    assert = require('assert');

var db = new Db('test', new Server('localhost', 27017));

// Establish connection to db

db.open(function(err, db) {

  // Fetch a collection to insert document into

  db.collection("remove_subset_of_documents_safe", function(err, collection) {

    // Insert a bunch of documents

    collection.insert([{a:1}, {b:2}], {w:1}, function(err, result) {

      assert.equal(null, err);

      // Remove all the document

      collection.remove({a:1}, {w:1}, function(err, numberOfRemovedDocs) {

        assert.equal(null, err);

        assert.equal(1, numberOfRemovedDocs);

        db.close();

      });

    });

  })

});