所以這個想法是當我改變產品時，它會檢查當前分支上可用的庫存，如果沒有，則會引發(fā)沒有庫存的錯誤預期行為：當所選產品上沒有庫存時，將引發(fā)錯誤，如果沒有庫存可用，則不會將記錄添加到樹視圖中當前行為：當所選產品上沒有庫存可用但記錄仍被添加到 one2many 樹視圖中時，將引發(fā)錯誤代碼如下# -*- coding: utf-8 -*-from docutils.nodes import linefrom odoo import models, fields, api, _from odoo.exceptions import ValidationErrorclass CustomTransRequest(models.Model):    _name = 'custom.trans.request'    _description = 'Transfer Request'    user_id = fields.Many2one('res.users', string='Salesperson', default=lambda self: self.env.user)    branch_from_id = fields.Many2one('custom.branch', string="From", required=True)    branch_to_id = fields.Many2one('custom.branch', string="To", required=True)    product_ids = fields.One2many(comodel_name="custom.trans.line", inverse_name="request_id", string="Products",                                  required=False, )class CustomTransLine(models.Model):    _name = 'custom.trans.line'    _description = 'Transfer Request Line'    branch_from_id = fields.Many2one(comodel_name="custom.branch", string="Branch", )    request_id = fields.Many2one("custom.trans.request", string="Request ID", )    product_id = fields.Many2one("custom.product", string="Product", required=True, )    qty = fields.Integer(string="Qty")    @api.onchange('product_id')    def onchange_product(self):        if self.product_id:            for rec in self:                selected_lines = rec.env['custom.branch.line'].search(                    ['&', ('product_id', '=', rec.product_id.id), ('branch_id', '=', rec.branch_from_id.id)]).mapped(                    'qty')                if not selected_lines:                    raise ValidationError(                        _('Current branch has ZERO stock on this product, Please select an available Product'))