from odoo import models

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

    def button_confirm(self):
        return super(PurchaseOrder, self.with_context(bypass_user_restriction=True)).button_confirm()

    def button_approve(self, force=False):
        return super(PurchaseOrder, self.with_context(bypass_user_restriction=True)).button_approve(force=force)