How Do I Transfer Data From Sale Order To Invoice When Clicking On 'create Invoice' In Odoo 14 Or Flectra 1.7?

I run Flectra inside a Docker container. I have custom fields in sale.order which I want to transfer to account.invoice. class SaleOrder(models.Model): _inherit = 'sale.order'

Solution 1:

Try this:

def create_invoice(self):
    for rec in self:
        invoice = rec.env['account.move'].create({
            'move_type': 'out_invoice',
            # 'partner_id': self.partner.id, 
            'journal_id': 18, # say u forget to create journal 
            # 'currency_id': self.env.ref('base.USD').id, 
            'payment_reference': 'invoice to client',  

            'invoice_line_ids': [(0, 0, {
                'product_id': self.env['product.product'].create({'name': 'A Test Product'}),
                'quantity': 1,
                'price_unit': 40,
                'name': 'Your project product',
            })],
        })