flutter Sqlite problem : my app doesnt generate a database - flutter

Question

my console shows no error but still i cant generate a data base with my app i dont know where's the problem at first when i run the app and add a transaction and then i enter the transaction page it shows 'no transactions' and then when i left the app and get back it shows 'loading' and when i try add another transaction the button add doesnt respond i have to say that when i delete the part of the code about db the app works perfectly but without a database
import 'dart:io';
import 'package:path/path.dart';
import 'package:sqflite/sqflite.dart';
import 'package:path_provider/path_provider.dart';
import 'transaction.dart';
class TransactionsDatabase {
static final TransactionsDatabase instance = TransactionsDatabase._init();
static Database? _database;
TransactionsDatabase._init();
Future<Database> get database async {
if (_database != null) return _database!;
_database = await _initDB();
return _database!;
}
Future<Database> _initDB() async {
Directory documentsDirectory = await getApplicationSupportDirectory();
String path = join(documentsDirectory.path, 'TransactionsDatabase.db');
return await openDatabase(path, version: 1, onCreate: _createDB);
}
Future _createDB(Database db, int version) async {
final idType = 'INTEGER PRIMARY KEY AUTOINCREMENT';
final textType = 'TEXT NOT NULL';
final boolType = 'BOOLEAN NOT NULL';
final doubleType = 'DOUBLE NOT NULL';
await db.execute('''
CREATE TABLE $tableTransactions (
${TransactionFields.id} $idType,
${TransactionFields.isIncome} $boolType,
${TransactionFields.Tname} $textType,
${TransactionFields.Tamount} $doubleType,
${TransactionFields.time} $textType
)
''');
}
Future<int> create(Transactionn transactionn) async {
Database db = await instance.database;
return await db.insert(tableTransactions, transactionn.toJson());
}
Future<List<Transactionn>> readAllNotes() async {
Database db = await instance.database;
var transactions =
await db.query(tableTransactions, orderBy: TransactionFields.Tname);
List<Transactionn> transactionList = transactions.isNotEmpty
? transactions.map((json) => Transactionn.fromJson(json)).toList()
: [];
return transactionList;
}
Future close() async {
final db = await instance.database;
db.close();
}
}
my class exemple look like this : Transaction.dart
final String tableTransactions = 'transactions';
class TransactionFields {
static final List<String> values = [
/// Add all fields
id, isIncome, Tname, Tamount, time
];
static final String id = '_id';
static final String isIncome = 'isIncome';
static final String Tname = 'tname';
static final String Tamount = 'tamount';
static final String time = 'time';
}
class Transactionn {
final int? id;
final bool isIncome;
final String Tname;
final double Tamount;
final DateTime createdTime;
const Transactionn(
{this.id,
required this.isIncome,
required this.Tname,
required this.Tamount,
required this.createdTime});
Map<String, Object?> toJson() => {
TransactionFields.id: id,
TransactionFields.isIncome: isIncome ? 1 : 0,
TransactionFields.Tname: Tname,
TransactionFields.Tamount: Tamount,
TransactionFields.time: createdTime.toIso8601String(),
};
Transactionn copy({
int? id,
bool? isIncome,
String? Tname,
double? Tamount,
DateTime? createdTime,
}) =>
Transactionn(
id: id ?? this.id,
isIncome: isIncome ?? this.isIncome,
Tname: Tname ?? this.Tname,
Tamount: Tamount ?? this.Tamount,
createdTime: createdTime ?? this.createdTime,
);
static Transactionn fromJson(Map<String, Object?> json) => Transactionn(
id: json[TransactionFields.id] as int?,
isIncome: json[TransactionFields.isIncome] == 1,
Tname: json[TransactionFields.Tname] as String,
Tamount: json[TransactionFields.Tamount] as double,
createdTime: DateTime.parse(json[TransactionFields.time] as String),
);
}
in my Homepage class i use a dialogbox to add a transaction to my db :
onPressed: () async {
if (_IncomeName.text.isNotEmpty &
_IncomeAmountName.text.isNotEmpty) {
IncomeName = _IncomeName.text;
IncomeAmountName = _IncomeAmountName.text;
IncomeAmount = double.parse(IncomeAmountName);
IncomeAmount = IncomeAmount.toDouble();
await TransactionsDatabase.instance.create(Transactionn(
isIncome: true,
Tname: IncomeName,
Tamount: IncomeAmount,
createdTime: DateTime.now()));
tt = preferences.getDouble('total');
if (tt == null) {
ttt = IncomeAmount;
} else {
ttt = IncomeAmount + tt!;
}
preferences.setDouble('total', ttt);
setState(() {
capital = preferences.getDouble('total') as double;
});
_IncomeName.clear();
_IncomeAmountName.clear();
Navigator.pop(context);
} else {}
},
and then i have a transactions page where im supposed to see all my db contents transactions.dart
import 'package:flutter/material.dart';
import 'package:mywallet/Database_Helper.dart';
import 'package:mywallet/transaction.dart';
class TransactionsPage extends StatefulWidget {
const TransactionsPage({Key? key}) : super(key: key);
#override
State<TransactionsPage> createState() => _TransactionsPageState();
}
class _TransactionsPageState extends State<TransactionsPage> {
List<Transactionn> transactions = [];
bool isLoading = false;
#override
void initState() {
refreshTransactions();
super.initState();
}
#override
void dispose() {
TransactionsDatabase.instance.close();
super.dispose();
}
Future refreshTransactions() async {
setState(() {
isLoading = true;
});
this.transactions = await TransactionsDatabase.instance.readAllNotes();
setState(() {
isLoading = false;
});
}
#override
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: Colors.black26,
body: Container(
padding:
const EdgeInsets.only(top: 40, left: 15, right: 15, bottom: 40),
child: Column(
children: [
Row(
children: [
const SizedBox(
width: 20,
),
IconButton(
icon: Image.asset(
'images/Images/back.png',
width: 24,
height: 24,
),
onPressed: () {
Navigator.pop(context);
},
)
],
),
const SizedBox(
height: 70,
),
Container(
width: MediaQuery.of(context).size.width,
height: 350,
decoration: BoxDecoration(
color: const Color.fromARGB(255, 25, 28, 31),
borderRadius: BorderRadius.circular(30)),
child: Container(
padding: const EdgeInsets.only(
top: 30, left: 20, right: 10, bottom: 10),
child: Column(
children: [
Row(
children: const [
Text('Transactions : ',
style: TextStyle(
fontSize: 14,
color: Color.fromARGB(249, 95, 190, 188),
fontWeight: FontWeight.bold))
],
),
const SizedBox(height: 20),
Center(
child: FutureBuilder<List<Transactionn>>(
future: TransactionsDatabase.instance.readAllNotes(),
builder: (BuildContext context,
AsyncSnapshot<List<Transactionn>> snapshot) {
if (!snapshot.hasData) {
return Center(
child: Text(
'Loading..',
style: TextStyle(
color: Colors.white, fontSize: 20),
));
}
return snapshot.data!.isEmpty
? const Center(
child: Text(
'no traansactiions',
style: TextStyle(
color: Colors.white, fontSize: 20),
))
: ListView(
children:
snapshot.data!.map((Transactionn) {
return Center(
child: ListTile(
title: Text(Transactionn.Tname),
),
);
}).toList(),
);
},
),
)
],
),
))
],
),
),
);
}
}