Question - do I have to denormalize due to MongoDB distinct() feature missing?

Hi,
I have a collection Songs which contains data in the following format:

`{artist:"Dream Theater", title: "Pull me under"}, {artist:"Dream Theater", title: "Finally free"}`

There are more than 5000 entries, so I definetely need server-side autocompletion.
On server I published the collection:

```
Meteor.publish("autocompleteArtists", function(selector, options) {
Autocomplete.publishCursor(Songs.find(selector, options), this);
this.ready();
});
```

Client subscription looks like:

```
Template.home.helpers({
settings: function() {
return {
position: "top",
limit: 5,
rules: [{
collection: 'Songs',
subscription: 'autocompleteArtists',
field: "artist",
template: Template.songItem
}]
};
}
});
```

Should I have both collection and subscription in the settings() function?

Last part, the client template:

`{{> inputAutocomplete settings=settings id="artistInput" type="text" placeholder="Artist" length="20"}}`

My purpose is to look for an artist and when I select it, to subscribe to a simple server publish which returns all songs belonging to that artist. The thing is, if I have multiple entries with the same artist, of course, the list of results is showing the artist multiple times. I would need to to somehow a "distinct" publish which would return all artists, but there's no such a feature in Meteor. I found some things implementing the aggregation and distinct, but I don't see how to use Autocomplete publishCursor function... My temporary solution was to denormalize and add a Artists collection, but I should not do that.

Is there a simpler way?

Start by tracing the `Meteor.publish("autocompleteArtists")` entry point, `Autocomplete.publishCursor`, and the client `settings()` configuration. Determine whether the package supports distinct artist results while preserving selection and song subscriptions; done means duplicate artists are eliminated and selecting an artist still retrieves its songs.

Written by the indexing model from the issue text.