How to select columns from joined tables: laravel eloquent

Question

I have a different problem from this. The scenario is same but I am in need of more filtration of the results.

Let me explain.

Consider I have 2 tables

Answer 1

Finally found it.. In the ->get() you have to put the 'staff_id' like this

Vehicle::where('id',1)
            ->with(['staff'=> function($query){
                            // selecting fields from staff table
                            $query->select(['staff.id','staff.name']);
                          }])
            ->get(['id','name','staff_id']);

Since I didn't take the staff_id, it couldn't perform the join and hence staff table fields were not shown.