how to get list of all records from table.

Hello,
Upon adding data, I want to get a list of all records from the localdatasource. using the getAll(), it is returning an empty array. Below is the code. I am sure im doing something wrong. Thanks.
```

add($event) {
$event.confirm.resolve($event.newData);
this.source.getAll().then((data) => console.log(data));
}
```

Thanks for some help.