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

[nobuQuartile]

QT7003

What

New module stock_lot_top_parent adding top-level parent traceability fields to lots/serials (Inventory > Products > Lots/Serial Numbers):

• Top lv Parent S/N (top_parent_lot_id): Many2one to the parent assembly's serial (lot) this lot belongs to.
• Top lv Parent P/N (top_parent_product_id): the parent's product — a related field (no compute, per maintainability guidance).
• Physical Location (top_parent_location_ids): Many2many of the parent serial's current internal location(s), computed on the fly from stock.quant (empty when not in any internal location).

Why

Trace where a unique serial is used, as part of moving the customer's spreadsheet-based management into Odoo. Per task-7003.

Test

• Installs on 16.0; pre-commit clean.
• Functionally verified on staging data: Physical Location resolves all internal locations of the parent serial (confirmed with a lot split across 2 locations), related P/N resolves, and it is empty when no parent is set.

[nobuQuartile]

Add ja.po

Translation notes

"Lot/Serial" is referenced from the existing Odoo translation (odoo/stock). The remaining terms are module-specific and translated independently:

msgid	msgstr
Physical Location	物理ロケーション
Top Level Parent	トップレベル親
Top lv Parent P/N	トップレベル親 P/N
Top lv Parent S/N	トップレベル親 S/N
Serial number of the top-level parent assembly this lot belongs to.	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。
Current internal locations of the top-level parent serial. Empty when it is not stored in any internal location.	トップレベル親シリアル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。

[nobuQuartile]

Ready for review

[AungKoKoLin1997]

Module name suggestion: stock_lot_parent.

[keinak]

御社の中で検討いただき問題無ければ、無視頂いて大丈夫です。

新規レコード（未保存フォーム）でのcompute動作 — [stock_lot.py:31-43] の _compute_top_parent_location_ids は、親未設定時に target_lot = lot として lot.id を search ドメインに渡します。新規作成フォームでは id が NewId（仮ID）のため、Odooのバージョン・パッチ状況によっては search がエラーになるか予期しない挙動になります。新規ロット作成フォームを開いた時にエラーが出ないか要確認です。防御的に以下のガードを推奨します:

for lot in self:
if not lot.id:
lot.top_parent_location_ids = False
continue

[AungKoKoLin1997]

Code Review: LGTM

[yostashiro]

Partial review.

[yostashiro]

Not a major issue, but worth addressing it before we get hiccups.

Suggested change

	@api.depends("top_parent_lot_id")
	@api.depends(
	"top_parent_lot_id",
	"top_parent_lot_id.quant_ids.quantity",
	"top_parent_lot_id.quant_ids.location_id",
	"quant_ids",
	"quant_ids.quantity",
	"quant_ids.location_id",
	)

[yostashiro]

Suggested change

	quants = quant_model.search(
	[
	("lot_id", "=", target_lot.id),
	("location_id.usage", "=", "internal"),
	("quantity", ">", 0),
	]
	)
	quants = target_lot.quant_ids.filtered(
	lambda q: q.location_id.usage == "internal"
	and float_compare(
	q.quantity, 0, precision_rounding=q.product_uom_id.rounding
	)
	> 0
	)

[nobuQuartile]

We decided not to follow up on this.
The clients will create the compute fields by themselves.