Hi to all

I am wondering how to ask dynamically the fields inside the select()
I know we can do dynamic *query* but how do we do dynamic *select*?

I want to avoid to do this if else (just an example):

if ask_for_lastname:
    user = db(db.auth_user.id == user_id).select(db.auth_user.first_name, 
db.auth_user.last_name).first()
else:
    user = db(db.auth_user.id == 
user_id).select(db.auth_user.first_name).first()

Thank you for the help

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