[odb-users] Re: 2-table query

[MM]

On 14 September 2015 at 15:45, Boris Kolpackov <boris at codesynthesis.com>
wrote:

> MM <finjulhich at gmail.com> writes:
>
> > odb generates the ?xx files, but it doesn't compile
>
> What is the error?!
>
>
> > #pragma db view object(F) object(M: F::get_m)\
> >   query( F::month.in (M::month1, M::month2) )
>
> ODB in() function only works on values, not members. I guess that's
> the error but I shouldn't be guessing.
>
> Boris
>

I see. I changed that. Thanks.

For the pragma syntax:

*object(**name* [*=* *alias*] [*join-type*] [*:* *join-condition*]*)*

In my case, I have 2 associated objects. F and M.

One can obtain the M object from the F object through this public member
function

struct F : public Base {
...
   const M* getM() const override;
};

I couldn't find out how to express the *join-condition.*
I tried (and used 2 aliases as well) this:

#pragma db view object(::NS::NS1::F = fctrct)   object(::NS::NS2::M = fmkt:
fctrct::getM)

 The error by the odb compiler is:

error: unable to resolve data member 'getM' specified with db pragma object

Basically, I don't understand the syntax of the join-condition. The example
in the manual show actual data members. I couldn't find an example with a
function member .

Rds,