from odoo import api, fields, models


class PurchaseOrder(models.Model):
    _inherit = 'purchase.order'

    # El nombre lo introduce el usuario: PED-X-AAAA
    @api.model_create_multi
    def create(self, vals_list):
        for vals in vals_list:
            if not vals.get('name') or vals['name'] == '/':
                vals['name'] = '/'
        return super().create(vals_list)