from odoo import models, fields


class PurchaseRequest(models.Model):
    _inherit = 'purchase.request'
    _description = '采购申请'

     # 为state添加取消状态
    state = fields.Selection(
        selection_add=[('cancel', '已取消')],
        ondelete={'cancel': 'set default'}  # 添加 ondelete 策略
    )


class PurchaseRequestLine(models.Model):
    _inherit = 'purchase.request.line'
    _description = '采购申请明细'