UPDATE2 我找到了解決方案(thx to rvirding)。我必須把對象這樣erlang pb客戶端鍵過濾器問題
Object = riakc_obj:new(list_to_binary(Bucket),
list_to_binary(Time),
list_to_binary(TimeValue)),
ok = riakc_pb_socket:put(Db_pid, Object);
而作出這樣
Query = [{map, %query type
{modfun, riak_kv_mapreduce, map_object_value}, %function from riak erlang built-in module
none, true}],
Inputs = {Bucket, [[<<"between">>, <<"0">>, <<"0.05">>]]},
Result = riakc_pb_socket:mapred(Pid, Inputs, Query),
我認爲它應該在文檔提到的請求。
順便說一句!如果我寫了
Object = riakc_obj:new(<<Bucket>>,
<<Time>>,
<<TimeValue>>),
我得到了有關badarg的錯誤。仍然感到困惑這個問題。(
UPDATE
如果我寫這篇文章
Inputs = {Bucket, [[<<"between">>, 0, 1]]}
我沒有錯誤,我甚至有「OK」的結果,但它是空的,這是不期望行爲)。
=========================================== ====================
我完全失去了我的想法,但我必須完成它。
我有一個簡單的應用程序:它從txt文件(數據如「時間戳值」)中提取數據,將其推送到Riak並進行一些範圍查詢。 問題是,當我做關鍵過濾器查詢我得到{錯誤,斷開}。 我以這種方式在riak中查找數據:key - timestamp(如0.43),value-value(如1.14),bucket-time數據添加(如「2011-07-24-23-39-45」)。 這裏的請求的代碼:
(dca_db.erl)
handle_call({range_query, Bucket, From, To}, _, #state{db_pid = Pid} = State) ->
Query = [{map, %query type
{modfun, riak_kv_mapreduce, map_object_value}, %function from riak erlang built-in module
none, true}],
Inputs = {Bucket, [["between", 0, 1]]},
Result = riakc_pb_socket:mapred(Pid, Inputs, Query),
{reply, Result, State};
(測試/ dca_db_tests.erl)
range_request(Pid) ->
Bucket = <<"2011-07-24-23-39-45">>,
Result = gen_server:call(Pid, {range_query, Bucket, 0, 1}),
error_logger:info_msg("RESULT:~p~n",[Result]).
你可以找到我的代碼在github上 - https://github.com/DimitryDushkin/distributed_calc_riak_matlab
如果我使用類似(在dca_db.erl中)
Inputs = {Bucket, [["eq", 1]]},
我有另一個錯誤
Compiled src/dca_db.erl
undefined
*unexpected termination of test process*
::{{badmatch,{<<"2011-07-24-23-39-45">>,[["eq",1]]}},
[{dca_db,handle_call,3},
{gen_server,handle_msg,5},
{proc_lib,init_p_do_apply,3}]}
=ERROR REPORT==== 25-Jul-2011::00:27:24 ===
** Generic server dca_db terminating
** Last message in was {range_query,<<"2011-07-24-23-39-45">>,0,1}
** When Server state == {state,<0.105.0>}
** Reason for termination ==
** {{badmatch,{<<"2011-07-24-23-39-45">>,[["eq",1]]}},
[{dca_db,handle_call,3},
{gen_server,handle_msg,5},
{proc_lib,init_p_do_apply,3}]}
=======================================================
Failed: 0. Skipped: 0. Passed: 1.
One or more tests were cancelled.
Cover analysis: /Users/ddushkin/Documents/workspaces/eclipse/distributed_calc_riak_matlab/.eunit/index.html
ERROR: One or more eunit tests failed.
make: *** [test_db] Error 1
如果我不使用過濾器一切正常:
Inputs = Bucket,
謝謝。
omg,你是tottaly rigth! – Dimitry