Subsequent 'change' events not firing.

Hi guys,

I’m using Realm’s ListView and an event listener to monitor for changes to the data and updating my ListView.

Oddly, it works fine on the first change to the data (e.g. adding a record or deleting a record) but on subsequent changes the event doesn’t seem to fire.

Here’s my setup:

constructor(props) {
  super(props);

  var dataSource = new ListView.DataSource(
    { rowHasChanged: (r1, r2) => r1 !== r2 } );

  this.state = {
    dataSource: dataSource.cloneWithRows(this.getRecords())
  };

  Realm.addListener('change', () => {
    console.log("Realm Changed!");

    this.setState({
      dataSource: dataSource.cloneWithRows(this.getRecords())
    })
  });
}

When I first add (or delete) a record, I see Realm Changed! in my console. However, if I add (or delete) a subsequent record, I don’t see this console message.

Any idea why this could be?

Thanks!

Josh

[joshuapinter]

@appden Right. Thanks. Yeah, I actually had the removeListener on the componentWillUnmount but removed it to test if that was causing issues. Had no effect.

Let me know what you think. Thanks again. Really appreciate it.

[joshuapinter]

Okay, I feel like a bit of a dum dum. On a nested page I was using Realm.removeAllListeners(); instead of removing just the listener for that page.

I’m having trouble using removeListener effectively but I’ll create a new issue for that.

Thanks for all your help. I’m closing this off now.