from odoo import models, fields, api, _
from odoo.exceptions import ValidationError
import logging

_logger = logging.getLogger(__name__)


class PurchaseRequest(models.Model):
    _inherit = 'purchase.request'
    

    def _validate_tier(self, tiers=False):
        res = super(PurchaseRequest, self)._validate_tier(tiers)

        # 检查是否所有审批都已通过
        all_approved = all(
            tier_review.status == 'approved'
            for tier_review in self.review_ids
        )

        if self.review_ids and all_approved:  # 确保有审批记录
            self.state = 'approved'

        return res
    
    @api.model
    def _get_under_validation_exceptions(self):
        res = super(PurchaseRequest, self)._get_under_validation_exceptions()
        res.append("state")
        return res