Odoo TypeError: expected string or buffer

Question

I have this new field for hr holiday status model

class CodeLeaveType(models.Model):
    _inherit = 'hr.holidays.status'

    code = fields.Char('Código para regla salarial', required=True)

    @api.one
    @api.onchange('code')
    def _check_code(self):
        pattern = "^[A-Z0-9]{3,6}$"
        if re.match(pattern, self.code) == None:
            self.code = ""
            return {
                'warning': {'title': 'Error',
                            'message': 'Formato de código para regla salarial no valido, debe incluir términos alfanúmeros en mayúsculas sin espacios, longitud máxima de caracteres 6', }
            }

But, when I try yo create a new holiday status get this error:

Then when I close the error my onchange method don't works normal I get this error.

I don't understand, plase help me. Maybe it's the regex?

I need a code only with uppercase or numbers with lenght between 3 and 6

EDITED

I change the regex by

class CodeLeaveType(models.Model):
    _inherit = 'hr.holidays.status'

    code = fields.Char('Código para regla salarial', required=True)

    @api.multi
    @api.onchange('code')
    def _check_code(self):
        if self.code:
            pattern = "^[A-Z0-9]{3,6}$"
            if re.match(pattern, self.code) == None:
                self.code = ""
                return {
                    'warning': {'title': 'Error',
                                'message': 'Formato de código no valido, debe incluir términos alfanúmeros y guion (si aplica), longitud 3 a 6 caracteres', }
                }

And the method works normal !!! what is the cause for this error?

Answer 1

删除@api.multi代码，因为您一次仅与一条记录进行交互。