How handle array of objects in collection? about cottz-publish-relations HOT 2 CLOSED

PublishRelations('MessagesList', function () {
  var participantsJoin, messageItemsJoin;

  participantsJoin = this.join(Meteor.users);
  messageItemsJoin = this.join(Collections.MessageItems);

  // participantsJoin will have the default selector: {_id: {$in: ids}}
  messageItemsJoin.selector = function (ids) {
    // ids is {$in: _ids}
    return {messageId: _ids};
  };

  this.cursor(Collections.Messages.find({
    'participants.id': this.userId
  }, {
    sort: {
      createdAt: -1
    }
  }), function (id, doc) {
    var participants;
    participants = doc.participants;
    // this "if" is important, check the documentation
    if (participants) {
      var ids;
      ids = participants.map(function (participant) {
        // don't use participantsJoin.push() here, add them all at the same time
        return participant.id;
      });
      // with ecmascript 6: participantsJoin.push(...ids);
      participantsJoin.push.apply(participantsJoin, ids);
    }
    messageItemsJoin.push(id);
  });

  participantsJoin.send();
  messageItemsJoin.send();

  return this.ready();
});