以下是您可以执行的操作示例：

-module(a).
-compile(export_all).

%%add_items(AuctionId, [{Item, Desc, Bid}]) -> 
                     {ok, [{ItemId, Item]} | {error, unknown_auction}.

add_items(AuctionId, Items) ->
    case valid_auction(AuctionId) of
        true -> insert_items(Items, _Results=[]);
        false -> {error, unknown_auction}
    end.

%% Here you should check the db to see if the AuctionId exists:
valid_auction(AuctionId) ->
    ValidAuctionIds = sets:from_list([1, 2, 3]),
    sets:is_element(AuctionId, ValidAuctionIds).

%% Here's a recursive function that pattern matches the tuples in the list:
insert_items([ {Item, Desc, Bid} | Items], Acc) ->
    %%Insert Item in the db here:
    io:format("~w, ~w, ~w~n", [Item, Desc, Bid]),
    ItemId = from_db,
    insert_items(Items, [{ItemId, Item} | Acc]);
insert_items([], Acc) ->
    lists:reverse(Acc).

在 shell 中：

8> c(a).                                
a.erl:2: Warning: export_all flag enabled - all functions will be exported
{ok,a}

9> a:add_items(4, [{apple, fruit, 10}]).
{error,unknown_auction}

10> a:add_items(1, [{apple, fruit, 10}, {cards, game, 1}]).
apple, fruit, 10
cards, game, 1
[{from_db,apple},{from_db,cards}]

11>

shell交互表明add_items()满足您的要求：
1.它有两个参数，第二个参数是一个列表，其元素是三个元素元组。
1.返回值是包含两个元素元组的列表的ok元组;或者元组{error,unknown_auction}。