Meteor Pub / Sub behaviour
<p>I'm currently implementing a realtime search function in my app and I've come across some behaviour which I'm confused about. </p>

<p>The background is: I have two subscriptions from the same MongoDB database on my server, named <code>posts</code>. </p>

<ol>
<li><p>The first subscription subscribes to the latest 50 posts, and sends the data to the MiniMongo collection <code>Posts</code>.</p></li>
<li><p>The second subscriptions subscribes to the post matching whatever search is entered by the user, and sends this data to MiniMongo collection <code>PostsSearch</code> as per below.</p>

<pre><code>// client

Posts = new Mongo.Collection('posts');

PostsSearch = new Mongo.Collection('postsSearch');

// server

Meteor.publish('postsPub', function(options, search) {

    return Posts.find(search, options);

});

Meteor.publish('postsSearchPub', function(options, search) {

    var self = this;

    var subHandle = Posts.find(search, options).observeChanges({

        added: function (id, fields) {

            self.added("postsSearch", id, fields);

        }

    });

    self.ready();
});
</code></pre></li>
</ol>

<p>My question is, we know from the docs:</p>

<blockquote>
  <p>If you pass a name when you create the collection, then you are
  declaring a persistent collection — one that is stored on the server
  and seen by all users. Client code and server code can both access the
  same collection using the same API.</p>
</blockquote>

<p>However this isn't the case with <code>PostsSearch</code>. When a user starts searching on the client, the functionality works perfectly as expected - the correct cursors are sent to the client.  </p>

<p>However I do not see a <code>postsSearch</code> in my MongoDB database and likewise, <code>PostsSearch</code> isn't populated on any other client other than my own.</p>

<p>How is this happening? What is <code>self.added("postsSearch", id, fields);</code> appearing to do that's it's able to send cursors down the wire to the client but not to the MongoDB database.</p>