TypeError: callback is not a function with Mongo multi: true

Hey guys,

Having this small issue where a method I’m calling is throwing an exception in the console. The method actually works but how can I address fixing the exception?

Function :

deleteAllNotifications(v) {
  if (this.props.notifications.length > 0) {
    Meteor.call('delete.all.notifications', v, (error) => {
    });
  }
}

Method :

'delete.all.notifications': function(v) {
  if (v === Meteor.userId()) {
    NotificationsCollection.remove({uid: Meteor.userId()}, { multi: true });
  } else {
    throw new Meteor.Error("Operation failed!");
  }
}

As mentioned, the function & method actually work but I’m seeing this in the server console :

Exception in callback of async function: TypeError: callback is not a function
    at packages/mongo/collection.js:729:7
    at runWithEnvironment (packages/meteor.js:1356:24)
    at packages/meteor.js:1369:14
    at packages/mongo/mongo_driver.js:323:7
    at runWithEnvironment (packages/meteor.js:1356:24)

Did a bit of searching and the only thing I could find was that this error gets thrown when you try to use insert with multi: true. Is this also the case with remove and if so how can I fix it?

Okay a bit of trial and error solved it…

In case anybody else stumbles across this :

You can’t use {multi: true} on remove.

'delete.all.notifications': function(v) {
  if (v === Meteor.userId()) {
    NotificationsCollection.remove({uid: Meteor.userId()});
  } else {
    throw new Meteor.Error("Operation failed!");
  }
}

Will do the job, removing all of the documents that match, without the need for {multi: true}.