class loyalty_coupon(models.Model):

    _name = 'loyalty.coupon'

    _columns = {

        'name': fields.char('Name', size=32, select=1, required=True, help='An internal identification for this loyalty coupon'),

       'loyalty_program_id': fields.many2one('loyalty.program', 'Loyalty Program', help='The Loyalty Program this coupon belongs to'),

       'reduction': fields.float('Reduction', help='The amount of reduction of this coupon in EUR'),

       'date': fields.date('Date Limit', help='The date limit of the coupon'),

       'limited': fields.boolean('Limited', help='The kind of coupon'),

       'used': fields.boolean('Used', help='The state of the coupon, used or not used'),

       'barcode': fields.char('Barcode', help="International Article Number used for coupon identification.", oldname='ean13', copy=False),

    }

    @api.one

    def report_coupon(self):

       _logger.info("IMPRESS")