Jan Penninkhof

The mentor number is unfortunately ambiguous and cannot be used as a key.

The first commits indeed used the mentor number as primary key. However, difficulties arose with new mentors that didn't have a number yet, alumni and project team members such as...

Great idea! :)

I've now quickly fixed it by building a custom OLingo version, but I'd rather stick to the standard, as it allows me to upgrade easier when new versions come out....

I'm afraid Olingo still doesn't like it, because those fields are still present in the metamodel: https://sapmentorsa5a504e08.hana.ondemand.com/com/sap/sapmentors/sitreg/odatapublic/service.xsodata/$metadata

Sorry @gregorwolf, I'm now using the right URL and it works like a charm. Let me know when you push this to production?

@I809764 I think it's quite important that this is changed as output currently doesn't follow the specs, which may break consuming systems. When it does, I can speak from experience...

Thanks @gregorwolf, changed the URL back to the production URL.