check deeply nested values section of manual
http://www.chicagoboss.org/api-record.html
get(Path::string()) -> Value
Returns a deeply nested value described by a dot-separated Path (e.g.
"puppy.mother.name")
On Thursday, July 3, 2014 6:05:07 PM UTC+4, graeme defty wrote:
>
> Another interesting one...
>
> One of my models was returning 'undefined' in response to boss_db:find/1
>
> I tracked it down to boss_db:find/2, part of which looks like this:
>
> <pre>
> find(Key, Timeout) when is_list(Key), is_integer(Timeout) ->
> [IdToken|Rest] = string:tokens(Key, "."),
> case db_call({find, IdToken}, Timeout) of
> undefined -> undefined;
> {error, Reason} -> {error, Reason};
> BossRecord -> BossRecord:get(string:join(Rest, "."))
> end;</pre>
>
> For some reason the BossRecord:get call on the second last line was
> returning 'undefined' on one of my models. (I didnt try them all, but 8-10
> others I tried were fine!)
>
> I fixed the problem by changing the code as follows:
>
> <pre>
> find(Key, Timeout) when is_list(Key), is_integer(Timeout) ->
> [IdToken|Rest] = string:tokens(Key, "."),
> case db_call({find, IdToken}, Timeout) of
> undefined -> undefined;
> {error, Reason} -> {error, Reason};
> BossRecord ->
> case Rest of
> [] -> BossRecord;
> _ -> BossRecord:get(string:join(Rest, "."))
> end
> end;
> </pre>
>
>
> I have no idea if this is a good solution (though it looks reasonable) and
> I am also equally puzzled by the fact that it only happened with one of my
> models, but then I dont know what the 'get' function is supposed to do.
> Perhaps someone wiser than I . . . .
>
>
> g
>
>
>
>
>
>
>
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