Hi,

I have the field in product.packaging called remaining_quantities and quantities .i already added product field to that.

class ProductPackaging(models.Model):

    _inherit = 'product.packaging'

    add_quantities = fields.Float(string="Quntities" ,compute='_compute_unit_carton')
    products = fields.Many2one('product.product',string="Product Name",default=_default_products)

and there is another field in stock.quant.package called remaining_quantity

class PackingCalculations(models.Model):
    _inherit = 'stock.quant.package'

    remaining_quantity= fields.Float(string="Remaning Quantity")

When I'm updating the add_quantities field remaining quantity will be minus with qty_done field value in stock.move.line.

Ex - qty_done - add_quantities = remaining_quantity

Please help me if you have any idea about this.