[16.0][ADD] sale_stock_picking_variable_qty: New module

sale_stock_picking_variable_qty/README.rst

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+===============================
+Sale Stock Picking Variable Qty
+===============================
+
+.. 
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! This file is generated by oca-gen-addon-readme !!
+   !! changes will be overwritten.                   !!
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+.. |badge1| image:: https://img.shields.io/badge/maturity-Alpha-red.png
+    :target: https://odoo-community.org/page/development-status
+    :alt: Alpha
+.. |badge2| image:: https://img.shields.io/badge/licence-LGPL--3-blue.png
+    :target: http://www.gnu.org/licenses/lgpl-3.0-standalone.html
+    :alt: License: LGPL-3
+.. |badge3| image:: https://img.shields.io/badge/github-OCA%2Fstock--logistics--workflow-lightgray.png?logo=github
+    :target: https://github.com/OCA/stock-logistics-workflow/tree/16.0/sale_stock_picking_variable_qty
+    :alt: OCA/stock-logistics-workflow
+.. |badge4| image:: https://img.shields.io/badge/weblate-Translate%20me-F47D42.png
+    :target: https://translation.odoo-community.org/projects/stock-logistics-workflow-16-0/stock-logistics-workflow-16-0-sale_stock_picking_variable_qty
+    :alt: Translate me on Weblate
+.. |badge5| image:: https://img.shields.io/badge/runboat-Try%20me-875A7B.png
+    :target: https://runboat.odoo-community.org/builds?repo=OCA/stock-logistics-workflow&target_branch=16.0
+    :alt: Try me on Runboat
+
+|badge1| |badge2| |badge3| |badge4| |badge5|
+
+Handle variable done quantity in multi-step deliveries.
+
+.. IMPORTANT::
+   This is an alpha version, the data model and design can change at any time without warning.
+   Only for development or testing purpose, do not use in production.
+   `More details on development status <https://odoo-community.org/page/development-status>`_
+
+**Table of contents**
+
+.. contents::
+   :local:
+
+Known issues / Roadmap
+======================
+
+- Detect what's a backorder and what's not...
+- Add setting at picking type (maybe we don't want this behavior all the
+  time)
+
+Bug Tracker
+===========
+
+Bugs are tracked on `GitHub Issues <https://github.com/OCA/stock-logistics-workflow/issues>`_.
+In case of trouble, please check there if your issue has already been reported.
+If you spotted it first, help us to smash it by providing a detailed and welcomed
+`feedback <https://github.com/OCA/stock-logistics-workflow/issues/new?body=module:%20sale_stock_picking_variable_qty%0Aversion:%2016.0%0A%0A**Steps%20to%20reproduce**%0A-%20...%0A%0A**Current%20behavior**%0A%0A**Expected%20behavior**>`_.
+
+Do not contact contributors directly about support or help with technical issues.
+
+Credits
+=======
+
+Authors
+-------
+
+* Moduon
+
+Maintainers
+-----------
+
+This module is maintained by the OCA.
+
+.. image:: https://odoo-community.org/logo.png
+   :alt: Odoo Community Association
+   :target: https://odoo-community.org
+
+OCA, or the Odoo Community Association, is a nonprofit organization whose
+mission is to support the collaborative development of Odoo features and
+promote its widespread use.
+
+.. |maintainer-rafaelbn| image:: https://github.com/rafaelbn.png?size=40px
+    :target: https://github.com/rafaelbn
+    :alt: rafaelbn
+.. |maintainer-chienandalu| image:: https://github.com/chienandalu.png?size=40px
+    :target: https://github.com/chienandalu
+    :alt: chienandalu
+
+Current `maintainers <https://odoo-community.org/page/maintainer-role>`__:
+
+|maintainer-rafaelbn| |maintainer-chienandalu| 
+
+This module is part of the `OCA/stock-logistics-workflow <https://github.com/OCA/stock-logistics-workflow/tree/16.0/sale_stock_picking_variable_qty>`_ project on GitHub.
+
+You are welcome to contribute. To learn how please visit https://odoo-community.org/page/Contribute.

sale_stock_picking_variable_qty/__init__.py

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+from . import models

sale_stock_picking_variable_qty/__manifest__.py

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+# Copyright 2025 Moduon Team S.L.
+# License LGPL-3.0 or later (https://www.gnu.org/licenses/lgpl-3.0)
+{
+    "name": "Sale Stock Picking Variable Qty",
+    "summary": "Handle variable quantity in multi-step deliveries",
+    "version": "16.0.1.0.0",
+    "development_status": "Alpha",
+    "category": "Inventory/Delivery",
+    "website": "https://github.com/OCA/stock-logistics-workflow",
+    "author": "Moduon, Odoo Community Association (OCA)",
+    "maintainers": ["rafaelbn", "chienandalu"],
+    "license": "LGPL-3",
+    "depends": [
+        "sale_stock",
+    ],
+    "data": [],
+}

sale_stock_picking_variable_qty/models/__init__.py

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+from . import stock_move

sale_stock_picking_variable_qty/models/stock_move.py

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+# Copyright 2025 Moduon Team S.L.
+# License LGPL-3.0 or later (https://www.gnu.org/licenses/lgpl-3.0)
+from odoo import models
+from odoo.tools import float_compare
+
+
+class StockMove(models.Model):
+    _inherit = "stock.move"
+
+    def _get_final_sale_line_id(self):
+        # Consider only pick/pack moves
+        return (self.browse(self._rollup_move_dests(set()))).sale_line_id
+
+    def _action_done(self, cancel_backorder=False):
+        self._adjust_variable_quantity()
+        return super()._action_done(cancel_backorder=cancel_backorder)
+
+    def _adjust_variable_quantity(self):
+        """For moves where qty_done ≠ qty_demanded spread that new quantity across every
+        move_dest_id.
+        """
+        # TODO: Make this optionable (by operation or whatever)
+        # It doesn't make sense to analyize 0 qty moves as they're clearly not done
+        for move in self.filtered("quantity_done"):
+            # Nothing to do if the demand fits the qty done, let's avoid changes
+            rounding = move.product_uom.rounding
+            if (
+                float_compare(
+                    move.quantity_done,
+                    move.product_uom_qty,
+                    precision_rounding=rounding,
+                )
+                == 0
+            ):
+                continue
+            sale_line = move._get_final_sale_line_id()
+            if not sale_line:
+                continue
+            # The quantity of the move might be a partial of the sale line demand
+            locked_sale_line_qty = sale_line.product_uom_qty - move.product_uom_qty
+            # Finally we adjust just the variable demand corresponding to this move
+            sale_line.product_uom_qty = locked_sale_line_qty + move.quantity_done

sale_stock_picking_variable_qty/readme/DESCRIPTION.md

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+Handle variable done quantity in multi-step deliveries.

sale_stock_picking_variable_qty/readme/ROADMAP.md

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+- Detect what's a backorder and what's not...
+- Add setting at picking type (maybe we don't want this behavior all the time)