SyntheticMutation

// Declare publication

Meteor.publish('messages_by_thread', function (questionId) {
  check(questionId, String);

    // perform additional security checks here
  const channel = 'HZSos4nBiJfQRKgeA';
  console.log(channel);
  return Questions.find({ _id: 'HZSos4nBiJfQRKgeA' });
});

// Subscribe

Template.schedulesFooter.onCreated(() => {
  const self = Template.instance();

  self.autorun(() => {
    self.subscribe('messages_by_thread', 'HZSos4nBiJfQRKgeA');

    return undefined;
  });
});

// Declare method (server-side only)

Meteor.methods({
  'questions.typing': function (questionId) {
    check(questionId, String);

    const random = () => Random.id();
    SyntheticMutator.update(Questions, 'HZSos4nBiJfQRKgeA', {
      $set: { // you can use any modifier supported by minimongo
        random: random(),
      },
    });
  },
})

// Call method
Meteor.call('questions.typing', 'HZSos4nBiJfQRKgeA');


/**
 * No errors in console or anywhere.
 * But I can't see the random field anywhere in my minimongo.
**/