In a list view, I'm trying to display a field from another object. V7.

I have tried different things but no luck so far, like :

1. 'inventor_country_id': fields.related('inventor_id','country', readonly=True, type='many2one', relation='res.country', string='Country')
2. 'inventor_country_id': fields.text(related="...

Does somebody have an exemple so I can see exactly how it works?

Could we do it realtime with the Developer's mode. If yes, how?

Thanks!