From fd55a44bfb6e30ed5fee864e2477404d4af2d833 Mon Sep 17 00:00:00 2001
From: hsiegeln <37154749+hsiegeln@users.noreply.github.com>
Date: Wed, 22 Apr 2026 16:58:37 +0200
Subject: [PATCH] =?UTF-8?q?feat(shopping):=20Migration=20015=20=E2=80=94?=
 =?UTF-8?q?=20Check-Keys=20auf=20Unit-Family?=
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unit_key in shopping_cart_check wird von Roheinheit (g, kg, ml, l)
auf Family-Key (weight, volume) umgestellt, damit Abhaks stabil
bleiben wenn die Display-Einheit wechselt. Entstehende Duplikate
werden durch Behalten des juengsten rowid dedupliziert.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
---
 .../db/migrations/015_shopping_check_family.sql    | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 src/lib/server/db/migrations/015_shopping_check_family.sql

diff --git a/src/lib/server/db/migrations/015_shopping_check_family.sql b/src/lib/server/db/migrations/015_shopping_check_family.sql
new file mode 100644
index 0000000..f396ba1
--- /dev/null
+++ b/src/lib/server/db/migrations/015_shopping_check_family.sql
@@ -0,0 +1,14 @@
+-- Konsolidierung: unit_key in shopping_cart_check wird zum Family-Key, damit
+-- Abhaks stabil bleiben wenn Display-Unit zwischen g und kg wechselt.
+-- g/kg → 'weight', ml/l → 'volume', Rest bleibt unveraendert.
+UPDATE shopping_cart_check SET unit_key = 'weight' WHERE LOWER(TRIM(unit_key)) IN ('g', 'kg');
+UPDATE shopping_cart_check SET unit_key = 'volume' WHERE LOWER(TRIM(unit_key)) IN ('ml', 'l');
+
+-- Nach Relabeling koennen Duplikate entstehen (zwei Zeilen mit 'weight' pro
+-- name_key). Juengsten Eintrag behalten.
+DELETE FROM shopping_cart_check
+WHERE rowid NOT IN (
+  SELECT MAX(rowid)
+  FROM shopping_cart_check
+  GROUP BY name_key, unit_key
+);