Hi all!

I'm beginner!

Assumption, I have a customize field 'd1_analytic_required' (boolean) in model 'account.invoice'
And, a customize field 'd1_analytic' (boolean) in model 'account.account'

I want to check on Vendor Bill, if account field (in line) have attribute d1_analytic = True then 'd1_analytic_required' = True. My code:

@api.onchange('account_id')
def _onchange_account_id(self):
    for rec in self:
        if rec.invoice_line_ids:
            sum1 = 0
            for line in rec.invoice_line_ids:
                if line.account_id.d1_analytic:
                    sum1 += 1
            if sum1 > 0:
                rec.d1_analytic_required = True
            else:
                rec.d1_analytic_required = False

It's not working!!
Please help me! Thank in advance!