[FIX] delivery: only update not yet processed pickings based on the n…

…ew carrier

closes odoo/odoo#74419

X-original-commit: 3dce2fdea0060b1bc13bb35610b7fe01c71ef054
Signed-off-by: pimodoo <pimodoo@users.noreply.github.com>
Signed-off-by: Wolfgang Taferner <wtaferner@users.noreply.github.com>

addons/delivery/i18n/delivery.pot

@@ -994,6 +994,16 @@ msgstr ""
 msgid "Weight unit of measure label"
 msgstr ""
 
+#. module: delivery
+#: code:addons/delivery/models/sale_order.py:0
+#, python-format
+msgid ""
+"You can not update the shipping costs on an order where it was already invoiced!\n"
+"\n"
+"The following delivery lines (product, invoiced quantity and price) have already been processed:\n"
+"\n"
+msgstr ""
+
 #. module: delivery
 #: model_terms:ir.ui.view,arch_db:delivery.delivery_tracking_url_warning_form
 msgid "You have multiple tracker links, they are available in the chatter."

addons/delivery/models/sale_order.py

@@ -37,7 +37,16 @@ class SaleOrder(models.Model):
             self.recompute_delivery_price = True
 
     def _remove_delivery_line(self):
-        self.env['sale.order.line'].search([('order_id', 'in', self.ids), ('is_delivery', '=', True)]).unlink()
+        delivery_lines = self.env['sale.order.line'].search([('order_id', 'in', self.ids), ('is_delivery', '=', True)])
+        if not delivery_lines:
+            return
+        to_delete = delivery_lines.filtered(lambda x: x.qty_invoiced == 0)
+        if not to_delete:
+            raise UserError(
+                _('You can not update the shipping costs on an order where it was already invoiced!\n\nThe following delivery lines (product, invoiced quantity and price) have already been processed:\n\n')
+                + '\n'.join(['- %s: %s x %s' % (line.product_id.with_context(display_default_code=False).display_name, line.qty_invoiced, line.price_unit) for line in delivery_lines])
+            )
+        to_delete.unlink()
 
     def set_delivery_line(self, carrier, amount):