In Meteor, how can I query only the records of a given subscription?

Question

I understand that a a subscription is a way to flow records into a client-side collection, from this post, and others...

However, per this post, You can have multipl

Answer 1

What you seem to want to do is maintain two separate collections of records, where each collection is populated by a different publication. If you read the DDP specification, you'll see that the server tells the client which collection (not publication) each record belongs to, and multiple publications can actually provide different fields to the same record.

However, Meteor actually lets you send records to any arbitrary collection name, and the client will see if it has that collection. For example:

if (Meteor.isServer) {
  Posts = new Mongo.Collection('posts');
}

if (Meteor.isClient) {
  MyPosts = new MongoCollection('my-posts');
  OtherPosts = new MongoCollection('other-posts');
}

if (Meteor.isServer) {
  Meteor.publish('my-posts', function() {
    if (!this.userId) throw new Meteor.Error();

    Mongo.Collection._publishCursor(Posts.find({
      userId: this.UserId
    }), this, 'my-posts');

    this.ready();
  });

  Meteor.publish('other-posts', function() {
    Mongo.Collection._publishCursor(Posts.find({
      userId: {
        $ne: this.userId
      }
    }), this, 'other-posts');

    this.ready();
  });
}

if (Meteor.isClient) {
  Meteor.subscribe('my-posts', function() {
    console.log(MyPosts.find().count());
  });

  Meteor.subscribe('other-posts', function() {
    console.log(OtherPosts.find().count());
  });
}