I am pretty new to flutter and I have some questions about how database version control works for these apps with sqflite.
I have made a database file in my assets
SQFlite has already a built-in version management, but it will work only if you have a migration script. For what you've said that's probably not your case. You'll need to manage your version control by hand:
class DbHelper {
static const NEW_DB_VERSION = 2;
static final DbHelper _instance = DbHelper.internal();
factory DbHelper() => _instance;
DbHelper.internal();
Database _db;
Future get db async {
if (_db != null) {
return _db;
} else {
_db = await initDb();
return _db;
}
}
Future initDb() async {
final databasesPath = await getDatabasesPath();
final path = join(databasesPath, "database.db");
var db = await openDatabase(path);
//if database does not exist yet it will return version 0
if (await db.getVersion() < NEW_DB_VERSION) {
db.close();
//delete the old database so you can copy the new one
await deleteDatabase(path);
try {
await Directory(dirname(path)).create(recursive: true);
} catch (_) {}
//copy db from assets to database folder
ByteData data = await rootBundle.load("assets/databases/database.db");
List bytes = data.buffer.asUint8List(data.offsetInBytes, data.lengthInBytes);
await File(path).writeAsBytes(bytes, flush: true);
//open the newly created db
db = await openDatabase(path);
//set the new version to the copied db so you do not need to do it manually on your bundled database.db
db.setVersion(NEW_DB_VERSION);
}
return db;
}
}