How to override only the unlink method of account_invoice class?

Question

Hello all,

I'm trying to override the unlink method in the class account_invoice. To be able to erase invoice when I make tests.

I want the shortest possible code. What I do wrong?

from openerp import models, fields, api

class account_invoice(models.Model):
_inherit = ['account.invoice']

@api.multi
def unlink(self):
_inherit = ['unlink']
for invoice in self:
if invoice.state not in ('draft', 'cancel'):
raise Warning(_('You cannot delete an invoice which is not draft or cancelled. You shoul

Zbik · Accepted Answer

Try this:

from openerp import models, fields, api
from openerp.exceptions import except_orm, Warning, RedirectWarning

class account_invoice(models.Model):
_inherit = ['account.invoice']

@api.multi
def unlink(self):
for invoice in self:
if invoice.state not in ('draft', 'cancel'):
raise Warning(_('You cannot delete an invoice which is not draft or cancelled. You should refund it instead.'))
return models.Model.unlink(self)

PS. last line is *not super()!!!* because super() calls the method fro

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