[7030][ADD] product_weighing: append-only weighing lines with product Weighing tab

product_weighing/README.rst

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+.. image:: https://odoo-community.org/readme-banner-image
+   :target: https://odoo-community.org/get-involved?utm_source=readme
+   :alt: Odoo Community Association
+
+================
+Product Weighing
+================
+
+.. 
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! This file is generated by oca-gen-addon-readme !!
+   !! changes will be overwritten.                   !!
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! source digest: sha256:21fbf5e2cf7c9407d15e8a541c5b18e4abfda1788eb91e37fcc51ebd66e5d553
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+.. |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%2Frmm--custom-lightgray.png?logo=github
+    :target: https://github.com/qrtl/rmm-custom/tree/15.0/product_weighing
+    :alt: qrtl/rmm-custom
+
+|badge1| |badge2| |badge3|
+
+This module adds an **append-only** weighing line model
+(``product.weighing.line``) that stores weighing results (gross weight,
+dust deduction and net weight) sent from an external system against a
+product.
+
+To support the "no tampering of weighing data" claim, weighing lines are
+create-only: creation is allowed only for the dedicated integration
+group, and the model overrides ``write`` and ``unlink`` to always raise,
+so a line can never be modified or deleted after creation through any
+path - UI, RPC, ``sudo`` or the developer-mode superuser included
+(direct SQL is out of scope by design). The parent product cannot be
+deleted either while lines exist (``ondelete="restrict"``), so the trail
+is preserved.
+
+The product form gets a read-only **Weighing** tab showing three
+aggregate fields (computed from the lines) and the list of weighing
+lines.
+
+**Table of contents**
+
+.. contents::
+   :local:
+
+Configuration
+=============
+
+Assign the API integration user to the **Weighing Integration** group.
+Only members of this group can createweighing lines; no group can edit
+or delete them.
+
+The three aggregate fields on the product (Total Net Weight, Weighing
+Count, Weighing Confirmed At) are computed from the weighing lines, so
+the integration only needs to create ``product.weighing.line`` records;
+it does not write to ``product.template``.
+
+Usage
+=====
+
+Open a product and go to the **Weighing** tab. The tab shows the
+aggregate values and the weighing lines. Lines cannot be added, edited
+or removed from the interface; click a line to open its read-only detail
+(including the image hash).
+
+Bug Tracker
+===========
+
+Bugs are tracked on `GitHub Issues <https://github.com/qrtl/rmm-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/rmm-custom/issues/new?body=module:%20product_weighing%0Aversion:%2015.0%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
+
+Maintainers
+-----------
+
+This module is part of the `qrtl/rmm-custom <https://github.com/qrtl/rmm-custom/tree/15.0/product_weighing>`_ project on GitHub.
+
+You are welcome to contribute.

product_weighing/__init__.py

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+from . import models

product_weighing/__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": "Product Weighing",
+    "summary": "Append-only weighing lines linked to products for tamper-proof records",
+    "category": "Product",
+    "version": "15.0.1.0.0",
+    "author": "Quartile",
+    "website": "https://www.quartile.co",
+    "license": "AGPL-3",
+    "depends": ["product"],
+    "data": [
+        "security/product_weighing_security.xml",
+        "security/ir.model.access.csv",
+        "views/product_template_views.xml",
+    ],
+    "installable": True,
+}

product_weighing/i18n/ja.po

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+# Translation of Odoo Server.
+# This file contains the translation of the following modules:
+# 	* product_weighing
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: Odoo Server 15.0\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2026-08-05 05:05+0000\n"
+"PO-Revision-Date: 2026-08-05 05:05+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: product_weighing
+#: model:ir.model.constraint,message:product_weighing.constraint_product_weighing_line_weighing_id_uniq
+msgid "A weighing line with this Weighing ID already exists."
+msgstr "この計量IDの計量明細は既に存在します。"
+
+#. module: product_weighing
+#: model:ir.model.fields,help:product_weighing.field_product_weighing_line__dust_detail
+msgid "Breakdown of deducted items (e.g. 'cage cart x2, cart x1')."
+msgstr "控除品目の内訳（例:「かご台車×2, 台車×1」）。"
+
+#. module: product_weighing
+#: model:ir.model.fields,field_description:product_weighing.field_product_weighing_line__company_id
+msgid "Company"
+msgstr "会社"
+
+#. module: product_weighing
+#: model:ir.model.fields,field_description:product_weighing.field_product_weighing_line__create_uid
+msgid "Created by"
+msgstr "作成者"
+
+#. module: product_weighing
+#: model:ir.model.fields,field_description:product_weighing.field_product_weighing_line__create_date
+msgid "Created on"
+msgstr "作成日"
+
+#. module: product_weighing
+#: model:ir.model.fields,field_description:product_weighing.field_product_weighing_line__display_name
+msgid "Display Name"
+msgstr "表示名"
+
+#. module: product_weighing
+#: model:ir.model.fields,field_description:product_weighing.field_product_weighing_line__dust_detail
+msgid "Dust Deduction Detail"
+msgstr "ダスト控除内訳"
+
+#. module: product_weighing
+#: model:ir.model.fields,field_description:product_weighing.field_product_weighing_line__dust_weight
+msgid "Dust Deduction Weight (kg)"
+msgstr "ダスト控除重量(kg)"
+
+#. module: product_weighing
+#: model:ir.model.fields,help:product_weighing.field_product_weighing_line__weighing_id
+msgid "External weighing identifier (e.g. WEIGH-KNG-20260513-0001)."
+msgstr "外部計量ID（例: WEIGH-KNG-20260513-0001）。"
+
+#. module: product_weighing
+#: model:ir.model.fields,field_description:product_weighing.field_product_weighing_line__gross_weight
+msgid "Gross Weight (kg)"
+msgstr "総重量(kg)"
+
+#. module: product_weighing
+#: model:ir.model.fields,field_description:product_weighing.field_product_weighing_line__id
+msgid "ID"
+msgstr "ID"
+
+#. module: product_weighing
+#: model:ir.model.fields,field_description:product_weighing.field_product_weighing_line__image_hash
+msgid "Image Hash"
+msgstr "画像ハッシュ"
+
+#. module: product_weighing
+#: model:ir.model.fields,field_description:product_weighing.field_product_weighing_line____last_update
+msgid "Last Modified on"
+msgstr "最終更新日"
+
+#. module: product_weighing
+#: model:ir.model.fields,field_description:product_weighing.field_product_weighing_line__write_uid
+msgid "Last Updated by"
+msgstr "最終更新者"
+
+#. module: product_weighing
+#: model:ir.model.fields,field_description:product_weighing.field_product_weighing_line__write_date
+msgid "Last Updated on"
+msgstr "最終更新日"
+
+#. module: product_weighing
+#: model:ir.model.fields,field_description:product_weighing.field_product_weighing_line__measured_at
+msgid "Measured At"
+msgstr "計測日時"
+
+#. module: product_weighing
+#: model:ir.model.fields,field_description:product_weighing.field_product_weighing_line__measurer_name
+msgid "Measurer"
+msgstr "計測者"
+
+#. module: product_weighing
+#: model:ir.model.fields,field_description:product_weighing.field_product_weighing_line__net_weight
+msgid "Net Weight (kg)"
+msgstr "正味重量(kg)"
+
+#. module: product_weighing
+#: model:ir.model.fields,field_description:product_weighing.field_product_weighing_line__product_tmpl_id
+msgid "Product"
+msgstr "プロダクト"
+
+#. module: product_weighing
+#: model:ir.model,name:product_weighing.model_product_template
+msgid "Product Template"
+msgstr "プロダクトテンプレート"
+
+#. module: product_weighing
+#: model:ir.model.fields,field_description:product_weighing.field_product_weighing_line__receipt_no
+msgid "Receipt No."
+msgstr "レシート番号"
+
+#. module: product_weighing
+#: model:ir.model.fields,help:product_weighing.field_product_weighing_line__image_hash
+msgid ""
+"SHA-256 of the evidence image(s), comma-separated, for tamper verification."
+msgstr "証跡画像のSHA-256（複数の場合はカンマ区切り）。改ざん検証用。"
+
+#. module: product_weighing
+#: model:ir.model.fields,field_description:product_weighing.field_product_product__total_net_weight
+#: model:ir.model.fields,field_description:product_weighing.field_product_template__total_net_weight
+msgid "Total Net Weight"
+msgstr "合計正味重量"
+
+#. module: product_weighing
+#: model:res.groups,comment:product_weighing.group_weighing_integration
+msgid ""
+"Users allowed to create weighing lines via the\n"
+"            external integration (odoo-upload-system)."
+msgstr "外部連携（odoo-upload-system）経由で計量明細を作成できるユーザ。"
+
+#. module: product_weighing
+#: model_terms:ir.ui.view,arch_db:product_weighing.product_template_view_form
+msgid "Weighing"
+msgstr "計量"
+
+#. module: product_weighing
+#: model:ir.model.fields,field_description:product_weighing.field_product_product__weighing_confirmed_at
+#: model:ir.model.fields,field_description:product_weighing.field_product_template__weighing_confirmed_at
+msgid "Weighing Confirmed At"
+msgstr "計量確定日時"
+
+#. module: product_weighing
+#: model:ir.model.fields,field_description:product_weighing.field_product_product__weighing_count
+#: model:ir.model.fields,field_description:product_weighing.field_product_template__weighing_count
+msgid "Weighing Count"
+msgstr "計量数"
+
+#. module: product_weighing
+#: model:ir.model.fields,field_description:product_weighing.field_product_weighing_line__weighing_id
+msgid "Weighing ID"
+msgstr "計量ID"
+
+#. module: product_weighing
+#: model:res.groups,name:product_weighing.group_weighing_integration
+msgid "Weighing Integration"
+msgstr "計量連携"
+
+#. module: product_weighing
+#: model:ir.model,name:product_weighing.model_product_weighing_line
+msgid "Weighing Line"
+msgstr "計量明細"
+
+#. module: product_weighing
+#: model:ir.model.fields,field_description:product_weighing.field_product_product__weighing_line_ids
+#: model:ir.model.fields,field_description:product_weighing.field_product_template__weighing_line_ids
+msgid "Weighing Lines"
+msgstr "計量明細"
+
+#. module: product_weighing
+#: code:addons/product_weighing/models/product_weighing_line.py:0
+#, python-format
+msgid "Weighing lines are append-only and cannot be deleted."
+msgstr "計量明細は追記専用のため削除できません。"
+
+#. module: product_weighing
+#: code:addons/product_weighing/models/product_weighing_line.py:0
+#, python-format
+msgid "Weighing lines are append-only and cannot be modified."
+msgstr "計量明細は追記専用のため変更できません。"
+
+#. module: product_weighing
+#: model:ir.model.fields,help:product_weighing.field_product_product__weighing_confirmed_at
+#: model:ir.model.fields,help:product_weighing.field_product_template__weighing_confirmed_at
+msgid ""
+"When the most recent weighing line was recorded in Odoo, i.e. the latest "
+"creation timestamp among the lines. This is the time the external system "
+"pushed the result, not the time the weighing itself took place - for that, "
+"see Measured At on the individual lines. The two differ whenever results are"
+" backfilled after an outage."
+msgstr ""
+"最新の計量明細がOdooに記録された日時、すなわち明細の作成日時のうち最も新しいものです。これは外部システムが結果を送信した日時であり、計量そのものが行われた"
+"日時ではありません。後者については各明細の計測日時を参照してください。障害発生後に結果を遡って登録した場合、両者は異なります。"

product_weighing/models/__init__.py

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+from . import product_weighing_line
+from . import product_template

product_weighing/models/product_template.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 ProductTemplate(models.Model):
+    _inherit = "product.template"
+
+    weighing_line_ids = fields.One2many(
+        "product.weighing.line",
+        "product_tmpl_id",
+        string="Weighing Lines",
+    )
+    weighing_count = fields.Integer(
+        compute="_compute_weighing_aggregates",
+        store=True,
+    )
+    total_net_weight = fields.Float(
+        digits=(10, 2),
+        compute="_compute_weighing_aggregates",
+        store=True,
+    )
+    weighing_confirmed_at = fields.Datetime(
+        compute="_compute_weighing_aggregates",
+        store=True,
+        help="When the most recent weighing line was recorded in Odoo, i.e. the "
+        "latest creation timestamp among the lines. This is the time the "
+        "external system pushed the result, not the time the weighing itself "
+        "took place - for that, see Measured At on the individual lines. The "
+        "two differ whenever results are backfilled after an outage.",
+    )
+
+    @api.depends(
+        "weighing_line_ids",
+        "weighing_line_ids.net_weight",
+        "weighing_line_ids.create_date",
+    )
+    def _compute_weighing_aggregates(self):
+        for tmpl in self:
+            lines = tmpl.weighing_line_ids
+            tmpl.weighing_count = len(lines)
+            tmpl.total_net_weight = sum(lines.mapped("net_weight"))
+            tmpl.weighing_confirmed_at = max(lines.mapped("create_date"), default=False)