oneBy method
xx(key: 1, ...)
xx(key: 1,name,...)
support union primary key(s)
Implementation
Future<M?> oneBy({required Object key, Object? groupBy, Object? having, Object? window, Object? orderBy, SQLExecutor? executor}) async {
return await oneModel(where: _keyWhere(key), groupBy: groupBy, having: having, window: window, orderBy: orderBy, executor: executor);
}