Hi Buriwoy, Sorry for the hassle with the docs. Good to hear you're up and running. I scanned the thread really quickly and it didn't look like you mentioned
http://wiki.basho.com/Secondary-Indexes.html Assuming you've seen them, can you take 15 minutes and put together your thoughts on how to improve them in a wiki issue [1]. It shouldn't take anyone nearly this long to get up and running with any component of Riak. Our fault. Appreciate your help with fixing it. Mark 1 - https://github.com/basho/riak_wiki/issues/new On Mar 11, 2012, at 18:48, Buri Arslon <buri...@gmail.com> wrote: > After several hours of searching, trying, getting errors ... finally I was > able to insert secondary index with riak-erlang-client. Here is the code > which I successfully ran: > > %% Set some vars > {Bucket, Key, Index} = {<<"test_users">>, <<"aldarkusa">>, > [{"qayerda_bin", "Qozoqta"}]}. > > %% Connect to riak > {ok, Pid} = riakc_pb_socket:start_link("127.0.0.1", 8087). > > %% Create a new riak object > Obj = riakc_obj:new(Bucket, Key, <<"Yomonlarni aldap yurgan Aldarkusa">>). > > %% Create a new metadata with secondary index > Meta = dict:store(<<"index">>, Index, dict:new()). > > %% Update the object we've created before > NewObj = riakc_obj:update_metadata(Obj, Meta). > > %% Finally, put/insert the updated new object > riakc_pb_socket:put(Pid, NewObj). > > > I think Basho should update/improve the documentation. Examples in Links page > (http://wiki.basho.com/Links.html) gave me some clues how to update metadata > but the examples themselves were outdated. > > Another idea is to allow users to post their examples (community content). > > Regards, > -- Buriwoy > > On Sun, Mar 11, 2012 at 4:14 PM, Buri Arslon <buri...@gmail.com> wrote: > I have some clue how to add secondary index but data types are confusing for > me: > > > ObjNew = riakc_obj:new(<<"test_users">>, <<"adm">>, <<"My value">>). > > Index = [ <<"field1_bin">>, <<"my_index">>]. > > Meta = dict:store(<<"index">>, Index, dict:new()). > > ObjNewMeta = riakc_obj:update_metadata(ObjNew, Meta). > > riakc_pb_socket:put(Pid, ObjNewMeta). > ** exception exit: {noproc, > {gen_server,call, > [<0.124.0>, > {req, > > {rpbputreq,<<"test_users">>,<<"adm">>,undefined, > {rpbcontent,<<"My > value">>,undefined,undefined, > > undefined,undefined,undefined,undefined,undefined,undefined, > [{rpbpair,<<"field"...>>,[...]}]}, > > undefined,undefined,undefined,undefined,undefined,undefined, > undefined}, > 60000}, > infinity]}} > in function gen_server:call/3 (gen_server.erl, line 188) > > So, I don't know what the problem is. I can only guess that index data type > may not be correct, but it's just guess. > > Any ideas? > -- Buriwoy > > On Sun, Mar 11, 2012 at 1:05 PM, Buri Arslon <buri...@gmail.com> wrote: > Thanks for your reply Jeremiah! > > I guess I am "greener" than you :) > > Before posting to the list, I looked through riak documentation, the list. I > did find some postings on the subject but almost all of'em were questions > than answers. The answers I could find were so ambiguous that I wasn't able > to use them. > > I've tried riakc_obj:update_metadata but got this error: > http://dpaste.com/715011/ > > So, I hoped to find a working example. I'm too new to Erlang to read the > source and solve my problems. > > Thanks again, > -- Buriwoy > > > On Sun, Mar 11, 2012 at 12:46 PM, Jeremiah Peschka > <jeremiah.pesc...@gmail.com> wrote: > Howdy Buri, > > I'm not an Erlang expert, or even something remotely resembling competent > with Erlang, however, I believe I have tracked down what you're looking for. > > You can use one of the riakc_pb_socket:get_index functions to pull back data > from an index. If you look at the source on the methods, you'll see that > they're just wrappers around a MapReduce call. As far as setting the > values... I think you'll have to make a call to riakc_obj:update_metadata and > add the index metadata in by hand, but I could be wrong on that one. > > If I'm wrong, hopefully someone on the list will correct my Erlang-y > ignorance. > > get_index/4 [1] > get_index/5 [3] > get_index/6 [2] > get_index/7 [4] > > > > [1]: > https://github.com/basho/riak-erlang-client/blob/master/src/riakc_pb_socket.erl#L677 > [2]: > https://github.com/basho/riak-erlang-client/blob/master/src/riakc_pb_socket.erl#L695 > [3]: > https://github.com/basho/riak-erlang-client/blob/master/src/riakc_pb_socket.erl#L714 > [4]: > https://github.com/basho/riak-erlang-client/blob/master/src/riakc_pb_socket.erl#L732 > --- > Jeremiah Peschka - Managing Director, Brent Ozar PLF, LLC > Microsoft SQL Server MVP > > On Mar 11, 2012, at 11:06 AM, Buri Arslon wrote: > > > Hi everybody, > > > > I can't find any tutorial or docs on secondary indexes. Here > > (http://lists.basho.com/pipermail/riak-users_lists.basho.com/2011-October/005952.html) > > it was stated that the docs would be updated but I can't find it. > > > > I just wanted a doc which explains how to use secondary indexes with native > > erlang client. Riak docs have examples for http api but not for erlang > > client. > > > > Can anyone refer me to appropriate docs/tutorials? > > > > Thanks, > > -- Buriwoy > > _______________________________________________ > > riak-users mailing list > > riak-users@lists.basho.com > > http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com > > > > > _______________________________________________ > riak-users mailing list > riak-users@lists.basho.com > http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com
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