erlang mysql multiple row result to xml -


i have multiple row result of mysql select in erlang :

{_,_, result} = ejabberd_odbc:sql_query(server,                             [<<"select group, group_concat(members.username separator ', ') member members id='">>,id,<<"'">>]),

result = [{"group","username1,username2, username3 ......."}.... {"group","username1,username2, username3 ......."}]

want convert results xml element :

xml = <group "xxxxxx">           <members>                 <member>                    <username>xxxxxx</username>                 </member>                 <member>                    <username>xxxxxx</username>                 </member>                 <member>                     .........                 </member>            </members>        </group>        ........        <group "xxxxxx">           <members>                 <member>                    <username>xxxxxx</username>                 </member>                 <member>                    <username>xxxxxx</username>                 </member>                 <member>                     .........                 </member>            </members>        </group>

any easy way place xmpp iq sub element in loop :

subel = [#xmlel{name = <<"members">>,          attrs = [{<<"xmlns">>, ?ns_chat}],          children = [#xmlel{name=<<"member">>,                       attrs = [{<<"username">>, username1}],                       children = []}]                     [#xmlel{name=<<"member">>,                       attrs = [{<<"username">>, username2}],                       children = []}]                       .............                     }],

here approach might work you:

create_xml() ->   % result set   input =[{"group1","username1,username2, username3"},           {"group2","username21,username22, username23"}],    result = lists:map(fun(group) -> [group_header(element(1, group)),                           create_segment(group),                            "</members> </group>"]             end,             input) lists:flatten(result).  % create each group segment folding on each group  create_segment(group) ->   tokenized = string:tokens(element(2, group), ","),   lists:foldl(fun(username, acc) ->                 [acc, "<member> <username>", username,                   "</username>  </member>"]               end,               "",               tokenized).  group_header(groupname) ->   ["<group \"", groupname, "\"", "<members>"].

running above, get: t:create_xml().

"<group \"group1\" <members> <member> <username>username1</username>  </member><member> <username>username2</username>  </member><member> <username> username3</username>  </member></members> </group><group \"group2\"<members><member> <username>username21</username>  </member><member> <username>username22</username>  </member><member> <username> username23</username>  </member></members> </group>"

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