There the problem. find returns a list of elements, not a single element.
So Master1 is a list of elements.
Do
[Master1] = boss_db:find(master, [{id, 'equals', "master-1"}]).
Then your attributes call should work.
-Jesse
--
Jesse Gumm
Owner, Sigma Star Systems
414.940.4866 || sigma-star.com || @jessegumm
On May 13, 2014 10:46 AM, "rastin rastini" <[email protected]> wrote:
> model file is attached.
>
> this is an work flow:
>
> 1>boss_db:find(master, []).
> [{master,"master-1",<<"naja">>,<<"tehran">>,
> <<"naja master">>},
> {master,"master-2",<<"artesh">>,<<"tehran">>,
> <<"artesh master">>}]
>
>
> 2> Master1= boss_db:find(master, [{id, 'equals', "master-1"}]).
> [{master,"master-1",<<"naja">>,<<"tehran">>,
> <<"naja master">>}]
>
> 3> Master1:attributes().
> ** exception error: bad argument
> in function apply/3
> called as apply([{master,"master-1",<<"naja">>,<<"tehran">>,
> <<"naja master">>}],
> attributes,[])
>
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