When creating an invoice thru code on odoo, even though the default state is draft, i think that you will need to pass that again in your dict as follows,

      # create invoice

        invoice_header = self.env['account.invoice'].create({

            'partner_id': customer,

            # 'number': self.get_invoice_sequence(),

            # 'date_invoice': today_date,

            'account_id': account_id,

            'journal_id': journal_id,

            'user_id': self.env.user.id,

            'state': 'draft',

        })

After that call the action as you did before in your code and it will be okay:

invoice_header.action_invoice_open()

If there are other issues when this invoice is created, you can always inherit the action_invoice_open def and make your changes in the function itself to avoid complications.

Just make sure to call it with super so that other things get calculated as well.

I hope it is helpfull

Riste Kabranov

Odoo developer at simplify-erp.com

Hi,

An open invoice with total amount  zero or is reconciled with full payment will be automatically converted to paid state.

Make sure your invoice's total amount is not zero and you are not creating any payment for this invoice.

Hello,

If you call validate button it will create one Journal entry for that invoice.

If the Journal entry  having debit and credit accounts both are payable/receivable then the invoice due amount is zero, so invoice moved to paid state.

Note : Either debit account or credit account only payable/receivable but not both.

Hi.

Did you get a solution?... I am having the same problem...The invoice is getting the paid state instead of open state.