onchange doesn't update field in screen

Question

I'm trying to override an onchange function of account move line model in order to update the value of a custom field I've added in account.move model:

class SoftOneInvoiceLine(models.Model):
_inherit= "account.move.line"

change_from_user=fields.Boolean('Change by user',default=True)

@api.onchange('quantity', 'discount', 'price_unit', 'tax_ids')
def _onchange_price_subtotal(self):
super(SoftOneInvoiceLine,self)._onchange_price_subtotal()
for rec in self:
if (rec.change_from_user):
rec.move_id

Panos Anagnostakis · Accepted Answer

I managed to find an alternative solution. I created another custom field global_discount_check in account.move which is set as invisible, computed and store=false. The field depends on invoice_line_ids.discount and whenever an invoice line discount changes it compares it to the global_discount field. If the two values are different then it sets global discount=0.
global_discount_check=fields.Float("discount checker",digits='Discount',store=False,compute="_check_global_discount")
@api.depends('i

Moaaz Gafar · Answer

Hi
try to add return
@api.onchange('quantity', 'discount', 'price_unit', 'tax_ids')
def _onchange_price_subtotal(self):
res=super(SoftOneInvoiceLine,self)._onchange_price_subtotal()
for rec in self:
if (rec.change_from_user):
rec.move_id.global_discount=0;
rec.move_id.update({'global_discount':0}) [1]
print (rec.move_id," ",rec.move_id.global_discount)
rec.change_from_user=True
return res

[1] https://rec.move_id.update({'global_discount':0})

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