We will learn how to work with IndexedDB and JSON web services through the indexed_db_spirals project (https://github.com/dzenanr/indexed_db_spirals), which is a todo app like the ones we've built in previous chapters, but that stores its data in IndexedDB. Get a copy of the code with a git clone:https://github.com/dzenanr/indexed_db_spirals.git.
In this spiral, todo tasks can be entered, and they are stored in IndexedDB; the following is a screenshot:
The Tasks screen of Spiral s00
Our model class is called Task, and lives in model.dart; with toDb and fromDb, it can transform an object to or make an object from a map:
class Task {
String title;
bool completed = false;
DateTime updated = new DateTime.now();
var key;
Task(this.title);
Task.fromDb(this.key, Map value):
title = value['title'],
updated = DateTime.parse(value['updated']),
completed = value['completed'] == 'true' {
}
Map toDb() {
return {
'title': title...