class customer_attachment(osv.Model): _name = 'bank.customer_attachment' _description = 'Bank customer attachment file'

_columns = {
    'datas_fname': fields.char('File Name',size=256),
    'file': fields.binary('File'),
}
defaults = {
'file': 'test_filname.pdf',

}

This is my class for attachment. Thanks in advance for help.... I want change the file name while download the attached file

Please Help me