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Suggestion how to update the BLOB type. #2

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merged 1 commit into from
Apr 24, 2023
Merged

Suggestion how to update the BLOB type. #2

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3 changes: 2 additions & 1 deletion lib/issue/task.dart
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
import 'dart:typed_data';

import 'package:floor/floor.dart';
import 'package:flutter/services.dart';

@Entity(tableName: Task.tableName)
class Task {
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6 changes: 6 additions & 0 deletions lib/issue/task_dao.dart
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
import 'dart:typed_data';
import 'package:floor/floor.dart';
import 'package:floor_issue/issue/task.dart';
import 'package:floor_issue/main.dart';

@dao
abstract class TaskDao {
Expand All @@ -12,4 +13,9 @@ abstract class TaskDao {

@Query('UPDATE ${Task.tableName} SET data = :data WHERE id = :id')
Future<void> updateData(Uint8List data, int id);

Future<void> rawUpdateData(Uint8List data, int id) {
return database.database.rawUpdate(
'UPDATE ${Task.tableName} SET data = ? WHERE id = ?', [data, id]);
}
}
31 changes: 12 additions & 19 deletions lib/main.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -3,24 +3,19 @@ import 'dart:typed_data';

import 'package:floor_issue/issue/database.dart';
import 'package:floor_issue/issue/task.dart';
import 'package:floor_issue/issue/task_dao.dart';
import 'package:flutter/material.dart';

late final AppDatabase database;

Future<void> main() async {
WidgetsFlutterBinding.ensureInitialized();

final database =
await $FloorAppDatabase.databaseBuilder('flutter_database.db').build();
final dao = database.taskDao;
runApp(MyApp(
taskDao: dao,
));
database = await $FloorAppDatabase.databaseBuilder('flutter_database.db').build();
runApp(const MyApp());
}

class MyApp extends StatelessWidget {
final TaskDao taskDao;

const MyApp({required this.taskDao, super.key});
const MyApp({super.key});

// This widget is the root of your application.
@override
Expand All @@ -30,15 +25,13 @@ class MyApp extends StatelessWidget {
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(taskDao: taskDao, title: 'Flutter Demo Home Page'),
home: const MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}

class MyHomePage extends StatefulWidget {
final TaskDao taskDao;

const MyHomePage({super.key, required this.taskDao, required this.title});
const MyHomePage({super.key, required this.title});

final String title;

Expand All @@ -47,6 +40,7 @@ class MyHomePage extends StatefulWidget {
}

class _MyHomePageState extends State<MyHomePage> {
late final taskDao = database.taskDao;
final int taskId = 1;

@override
Expand All @@ -64,9 +58,9 @@ class _MyHomePageState extends State<MyHomePage> {
String source = 'hello';
List<int> list = utf8.encode(source);
Uint8List data = Uint8List.fromList(list);
await widget.taskDao.insertTask(Task(taskId, data));
await taskDao.insertTask(Task(taskId, data));

widget.taskDao.findTaskById(taskId).then((value) {
taskDao.findTaskById(taskId).then((value) {
print(
'insertTask ${value?.id}, ${utf8.decode(value?.data ?? Uint8List(0))}');
});
Expand All @@ -79,9 +73,8 @@ class _MyHomePageState extends State<MyHomePage> {
String source = 'new_hello';
List<int> list = utf8.encode(source);
Uint8List data = Uint8List.fromList(list);
await widget.taskDao.updateData(data, taskId);

widget.taskDao.findTaskById(taskId).then((value) {
await taskDao.rawUpdateData(data, taskId);
taskDao.findTaskById(taskId).then((value) {
print(
'updateTask ${value?.id}, ${utf8.decode(value?.data ?? Uint8List(0))}');
});
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