findOne<T extends DbBaseModel> method

@override Future<DbResult<T>> findOne<T extends DbBaseModel>(String table, DbFilter filter, { DbFindOptions? findOptions, required T converter(Map<String, dynamic> map), })

查找单条记录

• DbResult.success 当 DbResult.result!=null 时为true
• DbResult.rescode 返回结果的数量 或 异常标识-1
• DbResult.result 类型T的实例 或 null

Implementation

@override
Future<DbResult<T>> findOne<T extends DbBaseModel>(String table, DbFilter filter, {DbFindOptions? findOptions, required T Function(Map<String, dynamic> map) converter}) async {
  try {
    final result = await _handle.findOne(table, filter, findOptions: findOptions, converter: converter);
    (result.success ? logDebug : logWarn)(['findOne =>', table, filter, findOptions, result]);
    return result;
  } catch (error, stack) {
    logError(['findOne =>', table, filter, findOptions, error, '\n', stack]);
    return DbResult(success: false, rescode: -1, message: error.toString());
  }
}