因此,作为项目的一部分,我试图建立一个Hive数据库,储存用户交易的下列细节(除2个用户外,所有用户都将投入)

1. _userID (uid generated by firebase)
2. amount (value of transaction - user)
3. type (Selected value from dropdown box - user)
4. categoryValue (Selected value from dropdown box - user)
5. DescriptionValue (String given by user)
6. DateTime (DateTime.now())

the code associated is as follows

OutlinedButton(
  onPressed: () {
     saveTransaction(
       _userID,
       amount,
       type,
       categoryValue,
       descriptionValue,
       DateTime.now(),
     );
                 

这是一条单独的智能文件界定的相关法典。

void main() async {
  await Hive.initFlutter();
  Hive.registerAdapter(TransactionModelAdapter());
}

void saveTransaction(String userId, double amount, String type, String category, String description, DateTime dateTime) async {
  // Open the Hive box for transactions
  final transactionsBox = await Hive.openBox<TransactionModel>( transactions );

  // Create a new transaction object
  final transaction = TransactionModel()
    ..userId = userId
    ..amount = amount
    ..type = type
    ..category = category
    ..description = description
    ..dateTime = dateTime;

  // Save the transaction to the box
  await transactionsBox.add(transaction);
}

The following is the 方框 model in a seraparate dart file

import  package:hive/hive.dart ;

part  transaction_model.g.dart ; // Generated file name

@HiveType(typeId: 0) // HiveType annotation with typeId
class TransactionModel extends HiveObject {
  @HiveField(0) // HiveField annotation with index
  late String userId; // Unique user ID associated with the transaction

  @HiveField(1) // HiveField annotation with index
  late double amount;

  @HiveField(2)
  late String type; // Type of transaction (e.g., expense, income)

  @HiveField(3)
  late String category; // Category of the transaction

  @HiveField(4)
  late String description; // Description of the transaction

  @HiveField(5)
  late DateTime dateTime; // Date and time of the transaction
}

并且现在,在出现错误的地方,最终实施

void main() async {
  runApp(transactionApp());
  Hive.registerAdapter(TransactionModelAdapter());
  await Hive.initFlutter();
}

class transactionApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: AllTransactionsPage(),
    );
  }
}

class AllTransactionsPage extends StatefulWidget {
  @override
  _AllTransactionsPageState createState() => _AllTransactionsPageState();
}

class _AllTransactionsPageState extends State<AllTransactionsPage> {
  late Box<TransactionModel> transact_box;

  @override
  void initState() {
    super.initState();
    _openBox();
  }

  Future<void> _openBox() async {
    transact_box = await Hive.openBox<TransactionModel>( transactions );
    setState(() {}); // Trigger rebuild after box is initialized
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text( All Transactions Page ),
      ),
      body: Center(
        child: ElevatedButton(
          onPressed: () {
            // Button onPressed action
            print( Button Pressed );
            print("Number of entries are ${transact_box.length}");
          },
          child: Text( Press Me ),
        ),
      ),
    );
  }
}

This above code was written to check if the entries are being added to the box as desired.

在我点击纽子时,我收到以下错误信息: