[odb-users] Sharing common object between multiple ODB schemas

[Per Edin]

Hi!

I'm having two different sets of ODB schemas in my application, core and extras.

// core/user.hxx
//

#include <my-app/uuid.hxx>

namespace core {

#pragma db my_app::object
class user {
    #pragma db id
    uuid id;
    // ...
};

}

// extras/profile.hxx
//

#include <my-app/uuid.hxx>

namespace my_app::extras {

#pragma db object
class profile {
    #pragma db id
    uuid id;
    // ...
};

}

// uuid.hxx
//

namespace my_app {

#pragma db value
class uuid {
    // ...
};

}

I process these and the other files in core/ and extras/ like this:

odb ... --at-once --schema-name core core/core.hxx
odb ... --at-once --schema-name extras extras/extras.hxx

core/core.hxx and extras/extras.hxx includes all headers belonging to
the respective schemas.

As can be seen the uuid class is shared between the two schemas. Can
you recommend a way to handle this? Currently, the database code for
class my_app::uuid ends up in both core-odb._xx and profile-odb._xx
resulting in duplicate symbols.

I guess I could just copy uuid.hxx to both core/ and extras/ but that
doesn't feel right.

A part from sharing some value types, the two schemas are completely unrelated.

Kind regards
Per Edin
Sequence Point AB