flutter hive: Unhandled Exception: RangeError: Not enough bytes available

[tazik561]

In my flutter application I have used hive to persist my data.Before i use my custom adapter like this:

class MessageModelAdapter
    extends TypeAdapter<GetPushNotificationContentListResponse> {
  @override
  final typeId = 4;

  @override
  GetPushNotificationContentListResponse read(BinaryReader reader) {
    var numOfFields = reader.readByte();
    var fields = <int, dynamic>{
      for (var i = 0; i < numOfFields; i++) reader.readByte(): reader.read(),
    };
    return GetPushNotificationContentListResponse(
      message: fields[0],
      messageId: fields[1],
      notificationType: fields[2],
      pushId: fields[3],
      sendDate: fields[4],
    );
  }

  @override
  void write(BinaryWriter writer, GetPushNotificationContentListResponse obj) {
    writer
      ..writeByte(5)
      ..writeByte(0)
      ..write(obj.message)
      ..writeByte(1)
      ..write(obj.messageId)
      ..writeByte(2)
      ..write(obj.notificationType)
      ..writeByte(3)
      ..write(obj.pushId)
      ..writeByte(4)
      ..write(obj.sendDate);
  }
}

But now i am trying to use like this:

class MessageModelAdapter
    extends TypeAdapter<GetPushNotificationContentListResponse> {
  @override
  final typeId = 4;

  @override
  GetPushNotificationContentListResponse read(BinaryReader reader) {

    return GetPushNotificationContentListResponse()
      ..message = reader.read()
      ..messageId = reader.read()
      ..notificationType = reader.read()
      ..pushId = reader.read()
      ..sendDate = reader.read();
  }

  @override
  void write(BinaryWriter writer, GetPushNotificationContentListResponse obj) {
    writer
      ..write(obj.message)
      ..write(obj.messageId)
      ..write(obj.notificationType)
      ..write(obj.pushId)
      ..write(obj.sendDate);
  }
}

But when i run application i got this error:

E/flutter ( 6361): [ERROR:flutter/lib/ui/ui_dart_state.cc(177)] Unhandled Exception: RangeError: Not enough bytes available.
E/flutter ( 6361): #0      BinaryReaderImpl._requireBytes
package:hive/…/binary/binary_reader_impl.dart:49
E/flutter ( 6361): #1      BinaryReaderImpl.readByteList
package:hive/…/binary/binary_reader_impl.dart:142
E/flutter ( 6361): #2      BinaryReaderImpl.read
package:hive/…/binary/binary_reader_impl.dart:304
E/flutter ( 6361): #3      MessageModelAdapter.read
package:iparsian_flutter/…/database/push_message_box.dart:150
E/flutter ( 6361): #4      BinaryReaderImpl.read
package:hive/…/binary/binary_reader_impl.dart:325
E/flutter ( 6361): #5      BinaryReaderImpl.readFrame
package:hive/…/binary/binary_reader_impl.dart:273
E/flutter ( 6361): #6      FrameHelper.framesFromBytes
package:hive/…/binary/frame_helper.dart:17
E/flutter ( 6361): #7      FrameIoHelper.framesFromFile
package:hive/…/io/frame_io_helper.dart:41
E/flutter ( 6361): <asynchronous suspension>
E/flutter ( 6361): #8      StorageBackendVm.initialize
package:hive/…/vm/storage_backend_vm.dart:82
E/flutter ( 6361): <asynchronous suspension>
E/flutter ( 6361): #9      BoxBaseImpl.initialize
package:hive/…/box/box_base_impl.dart:90
E/flutter ( 6361): #10     HiveImpl._openBox
package:hive/src/hive_impl.dart:106

How can i change implementation of adapter without problem?

[themisir]

Duplicate of #424

[tazik561]

I don't want to reinstall the application. I can not force the user to reinstall application .user has a data and they don't want to deleted.
There is no way to changing model structure without reinstall app?

[musman-deve]

If you have made any changes in Adapter then try re-generating it. Your issue will be fixed!