Hey,
Instead of a tuple you can also use for example your own class/struct, for
which you specialize Wt::Dbo::query_result_traits. You need to specialize
at least two methods. You will need to specialize a few more if you want to
use the Query inside a QueryModel.
struct Foo {
int a;
std::string b;
};
namespace Wt {
namespace Dbo {
template<>
struct query_result_traits<Foo> {
static void getFields(Session& session, std::vector<std::string> *aliases,
std::vector<FieldInfo>& result) {
query_result_traits<int>::getFields(session, aliases, result);
query_result_traits<std::string>::getFields(session, aliases, result);
}
static Foo load(Session& session, SqlStatement& statement, int& column) {
Foo result;
result.a = query_result_traits<int>::load(session, statement, column);
result.b = query_result_traits<std::string>::load(session, statement,
column);
return result;
}
};
}
}
Regards,
koen
2014-05-28 2:16 GMT+02:00 Muhammad Nasser Al-Noimi <mnno...@gmail.com>:
> Hi all,
>
> I want to generate query for aggregate data with more than 10 fields, When
> the number of fields were less than 10 I used boost::tuple for fields
> definition but boost::tuple cannot map more than 10 fields so how can I
> generate calculated query with more than 10 fields?
>
> Thanks a lot
>
>
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