[web2py] How to hide all fields of SQLFORM with submit button only?

[web2py_lover]

How to hide all fields of SQLFORM with submit button only?

all fields of  db.to_be_lawyer are  'name' and 'age'.


I try
        db.to_be_lawyer.name.default = 'default name'
        db.to_be_lawyer.age.default = '28'
        form_to_be_lawyer= SQLFORM(db.to_be_lawyer, fields=[], buttons
= [INPUT(_type='submit',_value="apply to be a lawyer")] )


but fail.