how fetch inherit model into another model field value fetch in other module value in odoo15

class StockPicking(models.Model): _inherit = ['stock. Picking'] _description = 'test.test' _order = 'id'
def _default_group_id(self): if self.env.context.get('default_picking_id'): return self.env['stock. Picking'].browse(self.env.context['default_picking_id']).group_id.id return False

1.Inventory—>tranfers—>create—->
quantity_done(Done) value fetch
employee_id = fields.Many2one(‘hr.employee’, ‘Employee’)
product_id = fields.Many2one(‘product. Product’, string=’Product’, check_company=True)
department_id = fields.Many2one(‘hr. Department’, string=’Department’)
product_id = fields.Many2one(‘product.product’, string=’Product’, check_company=True)

employee = fields. Char('hr.employee', related='employee_id.name')
department = fields. Char('hr. Department', related='department_id.name')
products = fields.Char('product.product', related='product_id.name')

product_uom = fields.Many2one('uom.uom', "UoM", required=True,
                              domain="[('category_id', '=', product_uom_category_id)]")
quantity_done = fields. Float('Quantity Done', compute='_quantity_done_compute', digits='Product Unit of Measure',
                             inverse='_quantity_done_set')
def change_release_date(self):
    # stock_move = self.env['stock. Move'].search([('product_id', '=', self._ids)])
    new = 'Employee Name:-' + str(self. Employee)
    new1 = 'Department:-' + str(self. Department)
    new2 = ' Date:-' + self.scheduled_date.strftime(
        '%Y-%m-%d,%H:%M:%S %p')
    new3 = 'Asset Name:-' + str(self. Products)
    new4 = 'Reference No:-' + self.name
    new5 = 'Quantity:-' + str(self.quantity_done)
    new_data = " " + new + "n " + new1 + "n" + new2 + "n " + new3 + "n " + new4 + "n" + " " + new5
    img = qrcode.make(new_data)
    print(new_data)
    img.save('C:/odoo/custom_addons/qr/qr1.png')

def _quantity_done_compute(self):
    if not any(self._ids):
        # onchange
        for move in self:
            quantity_done = 0
            for move_line in move._get_move_lines():
                quantity_done += move_line.product_uom_id._compute_quantity(
                    move_line.qty_done, move.product_uom, round=False)
            move.quantity_done = quantity_done
    else:
        # compute
        move_lines_ids = set()
        for move in self:
            move_lines_ids |= set(move._get_move_lines().ids)

        data = self.env['stock.move.line'].read_group(
            [('id', 'in', list(move_lines_ids))],
            ['move_id', 'product_uom_id', 'qty_done'], ['move_id', 'product_uom_id'],
            lazy=False
        )
        rec = defaultdict(list)
        for d in data:
            rec[d['move_id'][0]] += [(d['product_uom_id'][0], d['qty_done'])]

        for move in self:
            uom = move.product_uom
            move.quantity_done = sum(
                self.env['uom.uom'].browse(line_uom_id)._compute_quantity(qty, uom, round=False)
                for line_uom_id, qty in rec.get(move.ids[0] if move.ids else move.id, [])
            )
def _get_move_lines(self):

    self.ensure_one()
    if self.picking_type_id.show_reserved is False:
        return self.move_line_nosuggest_ids
    return self.move_line_ids