如何在odoo12中减少子产品和母产品的数量？

Question

我创建了一个包含多个产品的产品包，并且我希望在销售产品包时减少父产品和子产品的数量。我不知道该怎么做。如果有人可以，请帮助我。

class productpack(models.Model):
_name = "product.bundle"
_description = "The complete bundle of products"

config_prod_child_ids = 
        fields.Many2one(comodel_name='product.template',
        string=' Config Product',
        ondelete='cascade',
        required=True
        )
product_required = fields.Many2one('product.product', string = 
        "Required products",
        required=True)
required_quantity = fields.Integer(string = " Required Quantity", 
         default = "1")

并且父母在：

Class ProductTemplate（models.Model）：

_inherit = 'product.template'

config_prod_parent_ids = fields.One2many(comodel_name = 
       'product.bundle', inverse_name = 'config_prod_child_ids', 
        string = "Product Pack")
configure_ok = fields.Boolean(string='Can be Configured')