How to delete specific data from firebase - firebase

Question

I'm trying to implement a function that deletes specific data (based on id) from the server.
My function looks like this:
Future<bool> deleteData(int index) {
_data.removeAt(index);
notifyListeners();
return http
.delete(
'https://*my address*/${_data[index].id}.json')
.then((http.Response response) {
return true;
}).catchError((error) {
print(error);
return false;
});
}
The data is deleted locally, but not deleted on the server.
Instead I get this error:
I/flutter ( 5517): ══╡ EXCEPTION CAUGHT BY GESTURE
╞═══════════════════════════════════════════════════════════════════
I/flutter ( 5517): The following RangeError was thrown while handling
a gesture: I/flutter ( 5517): RangeError (index): Invalid value: Valid
value range is empty: 0

Answer 1

I found a solution to my problem -
Future<bool> deleteData(int index) {
selectedDataId = _data[index].id //new line
_data.removeAt(index);
notifyListeners();
return http
.delete(
'https://*my address*/${selectedDataId}.json')
.then((http.Response response) {
return true;
}).catchError((error) {
print(error);
return false;
});
}
Because i deleted my data locally, i needed to stroe it before in var and then use this var