[7003][ADD] stock_lot_top_parent: trace top-level parent on lots/serials

setup/stock_lot_top_parent/odoo/addons/stock_lot_top_parent

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+../../../../stock_lot_top_parent

setup/stock_lot_top_parent/setup.py

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+import setuptools
+
+setuptools.setup(
+    setup_requires=['setuptools-odoo'],
+    odoo_addon=True,
+)

stock_lot_top_parent/README.rst

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+====================
+Stock Lot Top Parent
+====================
+
+.. 
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! This file is generated by oca-gen-addon-readme !!
+   !! changes will be overwritten.                   !!
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! source digest: sha256:94b5d1f66e4e12433572b8e103c9da3fcd341da805c3f922bde6e4d38e4478bc
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+.. |badge1| image:: https://img.shields.io/badge/maturity-Beta-yellow.png
+    :target: https://odoo-community.org/page/development-status
+    :alt: Beta
+.. |badge2| image:: https://img.shields.io/badge/license-AGPL--3-blue.png
+    :target: http://www.gnu.org/licenses/agpl-3.0-standalone.html
+    :alt: License: AGPL-3
+.. |badge3| image:: https://img.shields.io/badge/github-qrtl%2Fthc--custom-lightgray.png?logo=github
+    :target: https://github.com/qrtl/thc-custom/tree/16.0/stock_lot_top_parent
+    :alt: qrtl/thc-custom
+
+|badge1| |badge2| |badge3|
+
+This module adds top-level parent traceability fields to lots/serials
+(*Inventory > Products > Lots/Serial Numbers*):
+
+- **Top lv Parent S/N**: the serial number (lot) of the top-level parent
+  assembly this lot belongs to.
+- **Top lv Parent P/N**: the product of the top-level parent serial (a
+  related field, kept in sync automatically).
+- **Physical Location**: the current internal location(s) of the
+  top-level parent serial, computed on the fly from stock quants. It is
+  empty when the parent serial is not stored in any internal location.
+
+**Table of contents**
+
+.. contents::
+   :local:
+
+Bug Tracker
+===========
+
+Bugs are tracked on `GitHub Issues <https://github.com/qrtl/thc-custom/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/qrtl/thc-custom/issues/new?body=module:%20stock_lot_top_parent%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
+-------
+
+* Quartile
+
+Contributors
+------------
+
+- `Quartile <https://www.quartile.co>`__:
+
+  - Toshikimi Shigenobu
+
+Maintainers
+-----------
+
+.. |maintainer-nobuQuartile| image:: https://github.com/nobuQuartile.png?size=40px
+    :target: https://github.com/nobuQuartile
+    :alt: nobuQuartile
+
+Current maintainer:
+
+|maintainer-nobuQuartile| 
+
+This module is part of the `qrtl/thc-custom <https://github.com/qrtl/thc-custom/tree/16.0/stock_lot_top_parent>`_ project on GitHub.
+
+You are welcome to contribute.

stock_lot_top_parent/__init__.py

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+from . import models

stock_lot_top_parent/__manifest__.py

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+# Copyright 2026 Quartile (https://www.quartile.co)
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+{
+    "name": "Stock Lot Top Parent",
+    "summary": "Track the top-level parent serial, part number and current "
+    "physical location on lots/serials.",
+    "version": "16.0.1.0.0",
+    "category": "Inventory",
+    "license": "AGPL-3",
+    "author": "Quartile",
+    "website": "https://www.quartile.co",
+    "maintainers": ["nobuQuartile"],
+    "depends": ["stock"],
+    "data": [
+        "views/stock_lot_views.xml",
+    ],
+    "installable": True,
+}

stock_lot_top_parent/i18n/ja.po

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+# Translation of Odoo Server.
+# This file contains the translation of the following modules:
+# 	* stock_lot_top_parent
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: Odoo Server 16.0+e\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2026-07-24 02:47+0000\n"
+"PO-Revision-Date: 2026-07-24 02:47+0000\n"
+"Last-Translator: \n"
+"Language-Team: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: \n"
+"Plural-Forms: \n"
+
+#. module: stock_lot_top_parent
+#: model:ir.model.fields,help:stock_lot_top_parent.field_stock_lot__top_parent_location_ids
+msgid ""
+"Current internal locations of Top lv Parent S/N, or of this lot itself when "
+"it has no parent. Empty when it is not stored in any internal location."
+msgstr "トップレベル親 S/N（親がない場合はこのロット自身）の現在の内部ロケーション。いずれの内部ロケーションにも保管されていない場合は空欄。"
+
+#. module: stock_lot_top_parent
+#: model:ir.model,name:stock_lot_top_parent.model_stock_lot
+msgid "Lot/Serial"
+msgstr "ロット/シリアル"
+
+#. module: stock_lot_top_parent
+#: model:ir.model.fields,field_description:stock_lot_top_parent.field_stock_lot__top_parent_location_ids
+msgid "Physical Location"
+msgstr "物理ロケーション"
+
+#. module: stock_lot_top_parent
+#: model:ir.model.fields,help:stock_lot_top_parent.field_stock_lot__top_parent_lot_id
+msgid "Serial number of the top-level parent assembly this lot belongs to."
+msgstr "このロットが属するトップレベル親アセンブリのシリアル番号。"
+
+#. module: stock_lot_top_parent
+#: model_terms:ir.ui.view,arch_db:stock_lot_top_parent.stock_lot_view_form
+msgid "Top Level Parent"
+msgstr "トップレベル親"
+
+#. module: stock_lot_top_parent
+#: model:ir.model.fields,field_description:stock_lot_top_parent.field_stock_lot__top_parent_product_id
+msgid "Top lv Parent P/N"
+msgstr "トップレベル親 P/N"
+
+#. module: stock_lot_top_parent
+#: model:ir.model.fields,field_description:stock_lot_top_parent.field_stock_lot__top_parent_lot_id
+msgid "Top lv Parent S/N"
+msgstr "トップレベル親 S/N"

stock_lot_top_parent/models/__init__.py

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+from . import stock_lot

stock_lot_top_parent/models/stock_lot.py

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+# Copyright 2026 Quartile (https://www.quartile.co)
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+
+from odoo import api, fields, models
+
+
+class StockLot(models.Model):
+    _inherit = "stock.lot"
+
+    top_parent_lot_id = fields.Many2one(
+        "stock.lot",
+        string="Top lv Parent S/N",
+        help="Serial number of the top-level parent assembly this lot belongs to.",
+    )
+    top_parent_product_id = fields.Many2one(
+        "product.product",
+        related="top_parent_lot_id.product_id",
+        string="Top lv Parent P/N",
+    )
+    top_parent_location_ids = fields.Many2many(
+        "stock.location",
+        string="Physical Location",
+        compute="_compute_top_parent_location_ids",
+        help="Current internal locations of Top lv Parent S/N, or of this lot "
+        "itself when it has no parent. Empty when it is not stored in any "
+        "internal location.",
+    )
+
+    @api.depends("top_parent_lot_id")
+    def _compute_top_parent_location_ids(self):
+        quant_model = self.env["stock.quant"]
+        for lot in self:
+            target_lot = lot.top_parent_lot_id or lot
+            if not target_lot.id:
+                lot.top_parent_location_ids = False
+                continue
+            quants = quant_model.search(
+                [
+                    ("lot_id", "=", target_lot.id),
+                    ("location_id.usage", "=", "internal"),
+                    ("quantity", ">", 0),
+                ]
+            )
+            lot.top_parent_location_ids = quants.location_id

stock_lot_top_parent/readme/CONTRIBUTORS.md

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+- [Quartile](https://www.quartile.co):
+  - Toshikimi Shigenobu

stock_lot_top_parent/readme/DESCRIPTION.md

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+This module adds top-level parent traceability fields to lots/serials
+(*Inventory > Products > Lots/Serial Numbers*):
+
+- **Top lv Parent S/N**: the serial number (lot) of the top-level parent
+  assembly this lot belongs to.
+- **Top lv Parent P/N**: the product of the top-level parent serial
+  (a related field, kept in sync automatically).
+- **Physical Location**: the current internal location(s) of the top-level
+  parent serial, computed on the fly from stock quants. It is empty when
+  the parent serial is not stored in any internal location.