如何在 create() 函数中获取动态 many2many 字段的值

Question

我想从 create() 函数中动态填充的 many2many 字段中获取值，但我得到了这个结果 [[6, False, [98]]]，虽然 98 实际上是预期结果这是我下面的代码

class CustomTransRequest(models.Model):
    _name = 'custom.trans.request'
    _description = 'Transfer Request'

    branch_from_id = fields.Many2one('custom.branch', string="From", required=True)
    branch_to_id = fields.Many2one('custom.branch', string="To", required=True)
    line_id = fields.Many2one('custom.branch.line', string="Products", required=True)
    product_id = fields.Many2many('custom.product', required=False, )
    qty = fields.Integer(string="Qty", required=True)

    @api.onchange('line_id')
    def onchange_line(self):
        if self.line_id:
            for rec in self:
                selected_products = rec.env['custom.branch.line'].search(
                    [('id', '=', rec.line_id.id)]).mapped('product_id')
                self.product_id = [(6, 0, selected_products.ids)]

    @api.model
    def create(self, vals):
        print("Create Function ")
        print("SELECT id FROM custom_branch_line WHERE (branch_id = %s) AND (product_id = %s)" % (
            vals.get('branch_to_id'), vals['product_id']))
        result = super(CustomTransRequest, self).create(vals)
        return result

Answer 1

这是 Odoo 处理 X2many 字段的方式，按照惯例，它们在创建方法中大部分时间都称为命令（或命令列表），将为您的 m2m 字段传递的命令将是：

 # only one command 6 which tell Odoo replace all record with the selected ids
 [(6, 0, [list_of_selected_record_ids)]

因此，为了检索它们，只需执行以下操作：vals['product_id'][0][2]

不，我不知道你是想显示 select 查询还是想使用，如果你只是打印它：

  # replace vals['product_id'] with 
  '({})'.format(','.join(vals['product_id'][0][2]))

如果要执行它，请使用查询参数：

self.cr.execute("SELECT id FROM custom_branch_line WHERE (branch_id = %s) AND (product_id = %s)", (vals['branch_to_id'], vals['product_id'][0][2]))

有关 X2many 命令的更多信息，请查看：

One2many and Many2many use a special "commands"

注意：我假设这个字段不会为空如果不是你需要先检查字段是否不为空

如何在 create() 函数中获取动态 many2many 字段的值

How to get the value of a dynamic many2many field in create() function

python

odoo

odoo-11

odoo-12