How to use method distinct?

[bengle]

db.collection.distinct('xxx',function(err,docs){...}) I used it like this,but it seems not correct.

[mbejda]

The only way I got distinct working with mongo skin is by doing this :

var store = mongo.db(connectionString, ackOptions);
store.open(function(err,resp){
     resp.collection(this.options.collection, {strict: true}, function(err, myCollection) {
        myCollection.distinct('tag',function(err,res){
            console.log(err)
            console.log(res)
        })
    });
})

[jmartorell]

Distinct function goes via native MongoDB driver, no code is added by MongoSkin AFAIK. distinct returns an array of keys, but only that.

distinct(key, query, callback)

You can use the result at the callback as a new query.

Imagine you want to get all the authors who greeted at least once in their posts:

var collection = this.db.collection('posts');
    collection.distinct( "author", {
      message: /^hi/
    }, function(error, keys) {
        collection.findItems({
            "author": { $in: keys}
        },
            function (error, results) {
              if (!error) {
                console.log(results)
              }
            });
    });

This works for me, I hope this issue can be closed.