Reactivity¶
Changefeed¶
A changefeed is available (inspired by Rethinkdb). It’s a stream that will notify about any change in the database.
import 'dart:async';
import 'package:flutter/material.dart';
import 'package:sqlcool/sqlcool.dart';
import 'dialogs.dart';
class _PageState extends State<Page> {
StreamSubscription _changefeed;
@override
void initState() {
_changefeed = db.changefeed.listen((change) {
print("CHANGE IN THE DATABASE:");
print("Change type: ${change.type}");
print("Number of items impacted: ${change.value}");
print("Query: ${change.query}");
if (change.type == DatabaseChange.update) {
print("${change.value} items updated");
}
});
super.initState();
}
@override
void dispose() {
_changefeed.cancel();
super.dispose();
}
// ...
}
class Page extends StatefulWidget {
@override
_PageState createState() => _PageState();
}