Virtual Fields combined with Alias not working

[unle70]

Hello,

I tried to set-up a Virtual field (first time for me). In my case, it's the "full_name" field in web2py auth_user, defined as:
Field.Virtual('full_name', lambda row: f'{row.auth_user.last_name} {row.auth_user.first_name}')

I see it's working well when trying to access the table in a simple way. When I do a "select" for all fields, I get this one as well.

db(db.some_table).select(
    db.some_table.ALL,
    db.auth_user..ALL
    left=db.some_table.on(db.auth_user.id == db.some_table.user1)
)

But if I try to refer to this table with alias (as below), I cannot see this virtual field anymore.

db(db.some_table).select(
    db.some_table.ALL,
    db.auth_user.with_alias('alias1').ALL
    left=db.some_table.on(db.auth_user.with_alias('alias1').id == db.some_table.user1)
)

I'm guessing the problem comes from stating the explicit table name ("auth_user") in the lambda function, which doesn't work when that table has an alias. Is there a way around this?