Odoo 10 -重写unlink方法

Question

我正在重写account.invoice中的unlink方法，以允许删除最后一次提交的发票。

这是我的代码：

class AccountInvoice(models.Model):
    _inherit = "account.invoice"

    @api.multi
    def unlink(self):
        for invoice in self:
            if invoice.state not in ('draft', 'cancel'):
                raise UserError(('You cannot delete an invoice which is not draft or cancelled. You should refund it instead.'))
            elif invoice.move_name:
                if invoice.journal_id.sequence_id:
                    sequence_id = invoice.journal_id.sequence_id
                    last_assigned_number = sequence_id.next_number_do_not_increase() - 1
                    last_assigned_number_text = sequence_id.get_next_char(last_assigned_number)
                    if last_assigned_number_text == invoice.move_name:
                        invoice.journal_id.sequence_id.write({'number_next': last_assigned_number})
                    else:
                        raise UserError(('You cannot delete an invoice after it has been validated (and received a number). You can set it back to "Draft" state and modify its content, then re-confirm it.'))
        return super(AccountInvoice, self).unlink()

到目前一切尚好,

我的具体问题在最后一行，当我运行此代码流时，此例程中没有引发UserErrors，但随后它运行AccountInvoice(AccountInvoice，self).unlink()，并执行旧的代码形式account_invoice.py：

@api.multi
def unlink(self):
    for invoice in self:
        if invoice.state not in ('draft', 'cancel'):
            raise UserError(_('You cannot delete an invoice which is not draft or cancelled. You should refund it instead.'))
        elif invoice.move_name:
            raise UserError(_('You cannot delete an invoice after it has been validated (and received a number). You can set it back to "Draft" state and modify its content, then re-confirm it.'))
    return super(AccountInvoice, self).unlink()

这会引发一个错误，我应该如何重写这个unlink方法才不会发生这种情况？

Answer 1

不知道这项工作是不是可以试试。

称它为发票本身的超级。

           super(invoice.AccountInvoice, self).unlink()

别忘了先导入发票。

Answer 2

如果你用覆盖了原来的方法，而不是扩展(添加)它，那么你只需要避免调用super。

    # replace this line to prevent the original method from running
    # return super(AccountInvoice, self).unlink()

    # this will unlink (delete) all records in the recordset without
    # calling the original method (which is what super does)
    return self.unlink()

Answer 3

导入首选的覆盖方法

from odoo.addons.account.models.account_invoice import AccountInvoice as BaseAccountInvoice

那就叫它

class AccountInvoice(models.Model):
    _inherit = 'account.invoice'

    @api.multi
    def unlink(self):
        return super(BaseAccountInvoice,self).unlink()