[IMP] Backport from https://github.com/ingadhoc/account-payment/commi…

account_payment_group_financial_surcharge/__manifest__.py

@@ -1,6 +1,6 @@
 {
     "name": "Payment Groups with Financial Surchange",
-    "version": "15.0.1.0.1",
+    "version": "15.0.2.0.1",
     "author": "ADHOC SA",
     "license": "AGPL-3",
     "category": "Payment",

account_payment_group_financial_surcharge/models/account_payment.py

@@ -62,6 +62,7 @@ def _onchange_instalment(self):
         for rec in self:
             rec._inverse_net_amount()
 
+    @api.onchange('net_amount')
     def _inverse_net_amount(self):
         for rec in self:
             rec.with_context(skip_account_move_synchronization=True).amount = rec.net_amount * (rec.installment_id.surcharge_coefficient or 1)

account_payment_group_financial_surcharge/models/account_payment_group.py

@@ -26,20 +26,27 @@ def post(self):
                 raise UserError(
                     "To validate payment with finacing plan is necessary to have a product surcharge in the "
                     "company of the payment. Please check this in the Account Config")
+            ## Obtengo las notas de debito relacionadas con el grupo de pago.
+            ## y computo la suma del precio toal del producto de surchage y si es menor al residual de las notas de debito
+            ## lo seteo como monto a facturar restandolo de el recargo caculado (esperado) 
+            related_debit_note = self.to_pay_move_line_ids.mapped('move_id').filtered(lambda x: x.l10n_latam_document_type_id.internal_type == 'debit_note')
+            surchage_products_total =  sum(related_debit_note.mapped('line_ids').filtered(lambda x:  x.product_id == product).mapped('price_total'))
+            financing_surcharge_to_invoice = self.financing_surcharge - (min(surchage_products_total, sum(related_debit_note.mapped('amount_residual'))))
+            if financing_surcharge_to_invoice > 0:                    
+                taxes = product.taxes_id.filtered(lambda t: t.company_id.id == self.company_id.id)
+                journal = self.env['account.journal'].search([('type', '=', 'sale'), ('company_id', '=', self.company_id.id)], limit=1)
+                wiz = self.env['account.payment.group.invoice.wizard'].with_context(
+                    is_automatic_subcharge=True, active_id=self.id, internal_type='debit_note').create({
+                        'journal_id': journal.id,
+                        'product_id': product.id,
+                        'tax_ids': [(6, 0, taxes.ids)],
+                        'amount_total': financing_surcharge_to_invoice,
+                    })
+                wiz.with_context(internal_type='debit_note')._onchange_journal_id()
+                wiz.change_payment_group()
+                wiz.amount_total = financing_surcharge_to_invoice
+                wiz.confirm()
 
-            taxes = product.taxes_id.filtered(lambda t: t.company_id.id == self.company_id.id)
-            journal = self.env['account.journal'].search([('type', '=', 'sale'), ('company_id', '=', self.company_id.id)], limit=1)
-            wiz = self.env['account.payment.group.invoice.wizard'].with_context(
-                is_automatic_subcharge=True, active_id=self.id, internal_type='debit_note').create({
-                    'journal_id': journal.id,
-                    'product_id': product.id,
-                    'tax_ids': [(6, 0, taxes.ids)],
-                    'amount_total': self.financing_surcharge,
-                })
-            wiz._onchange_journal_id()
-            wiz.change_payment_group()
-            wiz.amount_total = self.financing_surcharge
-            wiz.confirm()
 
             # If we are registering a payment of a draft invoice then we need to remove the invoice from the debts of the payment group
             # in order to be able to post/reconcile the payment group (this is needed because in odoo 15 we are not able to renconcile