Odoo域名为Many2Many关系

Question

这是代码：

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)])

我想要的是限制汽车的记录，当我通过在那辆车上停车而以团体形式挑选它时。但我的代码不起作用。怎么了？

Answer 1

如果您在python代码中定义域，则在用户选择parking_id后，每次用户更改parking_id时都需要更新域，因此不会更改域：

    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': []}}

Answer 2

看来你的语法对于域名是错误的，如下所示：

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