pub/sub pattern

gistfile1.js

// 
// publish list of books (and authors)
// 

Books.mainListCursor = function() {
  return Books.find({}, { sort: { createdAt: -1 }, limit: 10 });
};

if (Meteor.isServer) {
  Meteor.publish('books', function() {
    var books = Books.mainListCursor();

    return [
      books,
      Authors.find({ _id: { $in: books.map(function(book) { return book.authorId; }) }})
    ];
  });

  Meteor.publish('author', function(_id) {
    return Authors.find(_id);
  });
}

if (Meteor.isClient) {
  Meteor.subscribe('books');

  Deps.autorun(function() {
    Books.mainListCursor().forEach(function(book) {
      Meteor.subscribe('author', book.authorId);
    });
  });
}


// 
// publish list of 5 authors and all of their books
// 

Authors.mainListCursor = function() {
  return Authors.find({}, { sort: { createdAt: -1 }, limit: 5 });
};

if (Meteor.isServer) {
  Meteor.publish('authors', function() {
    var authors = Authors.mainListCursor();

    return [
      authors,
      Books.find({ authorId: { $in: authors.map(function(author) { return author._id; }) }})
    ];
  });

  Meteor.publish('bookByAuthorId', function(authorId) {
    return Books.find({ authorId: authorId });
  });
}

if (Meteor.isClient) {
  Meteor.subscribe('authors');

  Deps.autorun(function() {
    Authors.mainListCursor().forEach(function(author) {
      Meteor.subscribe('bookByAuthorId', author._id);
    });
  });
}