Automatic email on invoice validation

Question

How can I setup an automated action to email an invoice once it is validated?  I have tried on creation,  but that tries to send the email as soon as the invoice is created and before it is validated resulting in a $0 invoice being sent.

Answer

Hello,
When  validated Invoice, system was create account_move -> account_move_line. You want  Automatic email on invoice validation, you write in post function in account move.
class AccountMove(models.Model):
_inherit = 'account.move'

@api.multi
def post(self):
res = super(AccountMove, self).post()
// You write function send mail
return res

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