how to inherit on_change method

Question

i am trying to inherit product_id_change_with_wh method in sale_order_line object but it not override by my custom method

Qutechs, Ahmed M.Elmubarak · Accepted Answer

Hi,
It seems Ok ..
Just check these:
- in __openerp__.py you depends on 'sale_stock' module.
-  in the __init__.py you added your .py file ..
- Restart the server and upgrade your custom module ...
Hope this will help

Chirag Patel · Answer

class sale_order_line(osv.osv):
_inherit = 'sale.order.line'
def product_id_change_with_wh(self, cr, uid, ids, pricelist, product, qty=0,
uom=False, qty_uos=0, uos=False, name='', partner_id=False,
lang=False, update_tax=True, date_order=False, packaging=False, fiscal_position=False,
flag=False, warehouse_id=False, context=None):
print "================= inheriteed on_change method ============="

i have tried this but my custom method is not called only orginal method is called

Ankit H Gandhi(AHG) · Answer

Hello Chirag Patel,
Please refer below code, May be help for you.
*Solution-1:*
@api.v7
def onchange_partner_id((self, type, partner_id, date_invoice=False, payment_term=False, partner_bank_id=False, company_id=False):
#payment_method = res.partner.payment_method
#payment_method = ['test','TEST!']
return super(account_invoice, self).onchange_partner_id((type, partner_id, date_invoice=False, payment_term=False, partner_bank_id=False, company_id=False)

*Solution-2:*
@api.multi
def onchange_partne

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