python - How can I get the sale_order.id from sale_order_line onchange method? In odoo 9 -

i want id value of sale.order sale.order.line onchange method.

i have code:

class saleorderlineext(models.model):     _inherit = ['sale.order.line']      @api.multi     @api.onchange('my_field')     def my_field_change(self):          related_sale_order = self.order_id         print 'related_sale_order: ', related_sale_order         print 'related_sale_order.id: ', related_sale_order.id 

but output have this:

related_sale_order: sale.order(<openerp.models.newid object @ 0x7f7566029810>,) related_sale_order.id: <openerp.models.newid object @ 0x7f7566029810> 

i can check other values of sale order, not id. why , how can it?

in onchange method frame pass d dummy object have values in view in order original record :

self._origin.related_sale_order.id 

but should keep in mind related sale order when create record not yet saved in database keep getting same result in edit mode have id.

hope helps you.