final List<Map<String, dynamic>> maps = await dataBase.query('students'); return List.generate(maps.length, (i) => Student.fromJson(maps[i])); } // 转为 string 输出 getStudents() async { await students() .then((list) => list.forEach((s) => sb.writeln(s.toJson().toString()...
class AppDatabase extends _$AppDatabase{ AppDatabase() : super(_openConnection()); @override int get schemaVersion => 1; //插入一条数据 Future<int> saveEmployee(EmployeeData companion) async { return await into(employee).insert(companion); } } LazyDatabase _openConnection() { return Lazy...
name))); //释放数据库资源 final Database db = await database; db.close(); 可以看到,在面对大量格式化的数据模型读取时,数据库提供了更快、更灵活的持久化解决方案。 除了基础的数据库读写操作之外,sqlite还提供了更新、删除以及事务等高级特性,这与原生Android、iOS上的SQLite或是MySQL并无不同,因此这里...
{directory.path}/your_database.db'; // 打开数据库 final db = await openDatabase(dbPath); // 获取数据库文件的路径 final filePath = '${directory.path}/your_exported_database.db'; // 复制数据库文件 final data = await db.close(); final file = File.fromUri(Uri.parse("file://$f...
deleteFromFriendList 接口优化: deleteType 由 int 变更为 FriendTypeEnum getGroupMemberList 接口优化: filter 由 int 变更为 GroupMemberFilterTypeEnum getHistoryMessageList 接口优化: type 由 int 变更为 HistoryMsgGetTypeEnum getHistoryMessageListWithoutFormat 接口优化: type 由 int 变更为 HistoryMsgGetTypeEn...
final response = await _client.get( url.toString(),decoder: (data) => json.decode(data as String), headers: defaultHeaders, contentType: contentType, query: queryParameters, );return response.body as Map<String, dynamic>; } catch (error) { ...
URL']}/api/senses";Future<List<CommonSense>> getCommonSenseByPage( {int page = 1, int pageSize = 20}) async { final response = await Http.get( "$baseUrl/", params: {'page': page, 'pageSize': pageSize}, ); return SenseResponse.fromJson(response.data).data;} 然后至...
finalresponse =awaitHttp.get( "$baseUrl/", params: {'page': page,'pageSize': pageSize}, ); returnSenseResponse.fromJson(response.data).data; } 然后至于本地的事件提醒数据,打算定期备份,即把本地的数据库文件上传至服务器。【TODO】
Catching SocketExceptionzim32/mysql.dart#38 Open Oct 25, 2022 Calling the error throwing function insiderunZonedGuardedhelped me catch the error. michpolichtcommentedJan 23, 2023 Now good luck withWebSocketChannel.connect(), which isn't async and seems to wrap HTTPClient... ...
bool isExcludedFromLastMessage = false, Map<String, dynamic>? offlinePushInfo, String? cloudCustomData, String? localCustomData, } ) Parameters: Parameter Definition Valid for One-to-One Chat Valid for Group Chat Description id ID returned after message creation YES YES Create the message...