On Tue, Oct 9, 2012 at 7:49 AM, 郎咸武 <langxian...@gmail.com> wrote:
>
>
> ((ejabberd@meta)19> f(O),O=riakc_obj:new(<<"user1">>, <<"jason3">>,
> list_to_binary("[{\"name\":\"\\u00e9\\u0083\\u008e\\u00e5\\u0093\\u00b2\"},{\"sex\":\"male1\"}]"),
> "application/json").
> {riakc_obj,<<"user1">>,<<"jason3">>,undefined,[],
> {dict,1,16,16,8,80,48,
> {[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],...},
>
> {{[],[],[],[],[],[],[],[],[],[],[[<<...>>|...]],[],[],...}}},
>
>
> <<"[{\"name\":\"\\u00e9\\u0083\\u008e\\u00e5\\u0093\\u00b2\"},{\"sex\":\"male1\"}]">>}
>
> (ejabberd@meta)20> riakc_pb_socket:put(Pid, O).
> ok
>
> (ejabberd@meta)28> riakc_pb_socket:search(Pid, <<"user1">>,
> list_to_binary("\"sex\":male1*")). * The operation is ok.*
> {ok,{search_results,[{<<"user1">>,
> [{<<"id">>,<<"jason3">>},
> {<<"name">>,
>
> <<195,169,194,131,194,142,195,165,194,147,194,178>>},
> {<<"sex">>,<<"male1">>}]}],
> 0.0,1}}
>
Notice the value of the name field in the result here. It has been
properly converted to a UTF-8 sequence. That is, at some point Riak Search
took your ASCII string of unicode escapes and converted it to a proper
unicode byte sequence.
> (ejabberd@meta)29> riakc_pb_socket:search(Pid, <<"user1">>,
> list_to_binary("\"name\":\\u00e9\\u0083\\u008e\\u00e5\\u0093\\u00b2")).
>
> {ok,{search_results,[],0.0,0}} *%% But there is empty. Why?*
>
First off, you are adding additional quotes around the name field.
11> list_to_binary("\"name\":\\u00e9\\u0083\\u008e\\u00e5\\u0093\\u00b2").
<<"\"name\":\\u00e9\\u0083\\u008e\\u00e5\\u0093\\u00b2">>
Second, you are searching for the ASCII string
"\\u00e9\\u0083\\u008e\\u00e5\\u0093\\u00b2". At no point is this string
converted to a unicode sequence for you. This is the correct behavior
because you might have ASCII documents containing unicode escapes. You
need to query using a proper unicode binary.
19> riakc_pb_socket:search(Pid, <<"user1">>,
<<"name:",195,169,194,131,194,142,195,165,194,147,194,178>>).
{ok,{search_results,[{<<"user1">>,
[{<<"id">>,<<"jason3">>},
{<<"name">>,
<<195,169,194,131,194,142,195,165,194,147,194,178>>},
{<<"sex">>,<<"male1">>}]}],
0.35355299711227417,1}}
(ejabberd@meta)30> riakc_pb_socket:search(Pid, <<"user1">>,
> list_to_binary("\"name\":\\u00e9\\u0083\\u008e\\u00e5\\u0093\\u00b2*")).
>
> {ok,{search_results,[],0.0,0}} *%% There is empty,too. Why?*
>
>
20> riakc_pb_socket:search(Pid, <<"user1">>, <<"name:",195,169,"*">>).
{ok,{search_results,[{<<"user1">>,
[{<<"id">>,<<"jason3">>},
{<<"name">>,
<<195,169,194,131,194,142,195,165,194,147,194,178>>},
{<<"sex">>,<<"male1">>}]}],
0.0,1}}
-Z
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