Many2Many 关系的 Odoo 域答案

【问题标题】：Odoo domain for Many2Many relationMany2Many 关系的 Odoo 域
【发布时间】：2017-11-27 10:43:40
【问题描述】：

代码如下：

class Car(models.Model):
    _name = 'car'
    parking_id = fields.Many2one('cars')

class Parking(models.Model):
    _name = 'parking'
    cars_ids = fields.One2many('cars', 'parking_id')

class Group(models.Model):
    _name = 'group'
    parking_id = fields.Many2one('parking')
    cars_ids = fields.Many2many('cars', lambda self: [('parking_id', '=', self.parking_id)])

我想要的是通过停在这些汽车上来限制汽车的记录。但是我的代码不起作用。什么错误？

【问题讨论】：

标签： openerp

【解决方案1】：

如果你在 python 代码中定义域，它不会在用户之后更改选择parking_id 每次用户都需要更新域更改parking_id：

    class Group(models.Model):
        _name = 'group'
        parking_id = fields.Many2one('parking')
        # it's always better to define m2m field with full properties
        # cars_ids = fields.Many2many('cars','group_cars_rel', 'group_id', 'car_id', 'List of cars' )
        cars_ids = fields.Many2many('cars')


        @api.onchange('parking_id')
        def onchange_parking(self):
            """change the domain when user change parking_id"""
            # you may need to empty the many2many field if the user change the parking
            # if not just remove this line
            self.cars_ids = [(5, 0, 0)] # remove all record from many2many

            if self.parking_id:
                return {'domain': {'cars_ids': [('parking_id', '=', self.parking_id.id)]}}
            else:
                # remove domain
                return {'domain': {'cars_ids': []}}

【讨论】：

【解决方案2】：

您的域语法似乎错误，更改如下：

class Group(models.Model):
    _name = 'group'
    parking_id = fields.Many2one('parking')
    cars_ids = fields.Many2many('cars', domain=[('parking_id', '=', parking_id)])

【讨论】：