修复以前的老数据

migrations/000151_fix_historical_order_price_semantics.down.sql

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+-- 回滚历史价格修复
+--
+-- 警告：回滚会将 order_item.unit_price 恢复为成本价（旧语义），
+--       将 order.total_amount 恢复为成本价合计，
+--       并清除 package_usage.retail_amount。
+-- 仅在确认需要回滚时执行。
+
+BEGIN;
+
+-- Step 1: 将 order_item 还原为旧语义
+--   unit_price ← cost_price（旧成本价）
+--   amount     ← 重算小计
+--   cost_price ← 0（清除）
+UPDATE tb_order_item
+SET
+    unit_price = cost_price,
+    amount     = cost_price * quantity,
+    cost_price = 0
+WHERE cost_price > 0
+  AND deleted_at IS NULL;
+
+-- Step 2: 将 order.total_amount 恢复为成本价合计
+UPDATE tb_order o
+SET total_amount = sub.old_total
+FROM (
+    SELECT
+        oi.order_id,
+        SUM(oi.unit_price * oi.quantity) AS old_total
+    FROM tb_order_item oi
+    WHERE oi.deleted_at IS NULL
+    GROUP BY oi.order_id
+) sub
+WHERE o.id          = sub.order_id
+  AND o.deleted_at IS NULL
+  AND o.total_amount != sub.old_total;
+
+-- Step 3: 清除 package_usage.retail_amount
+UPDATE tb_package_usage
+SET retail_amount = NULL
+WHERE retail_amount IS NOT NULL
+  AND deleted_at IS NULL;
+
+COMMIT;

migrations/000151_fix_historical_order_price_semantics.up.sql

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+-- 历史订单价格语义修复
+--
+-- 背景：旧版代码将 order.total_amount 错误地设置为成本价（买家实付金额），
+--       而非零售价（客户端展示价格）。order_item.unit_price 同理。
+--       本迁移通过 tb_shop_package_allocation.retail_price 修复历史记录。
+--
+-- 识别条件：order_item.unit_price = 该代理商对该套餐的当前成本价（spa.cost_price）
+--            且 order_item.cost_price = 0（尚未修复）
+--
+-- 注意：使用"当前"代理商零售价修复历史数据，若价格自下单以来已调整，
+--       修复后的价格为当前价格而非历史价格，属已知局限。
+
+BEGIN;
+
+-- Step 1: 同步修复 order_item 三个字段
+--   cost_price ← 旧 unit_price（成本价备份）
+--   unit_price ← 代理商当前零售价（优先）或套餐建议零售价（兜底）
+--   amount     ← 重算小计
+WITH correct_item_prices AS (
+    SELECT
+        oi.id                                                   AS item_id,
+        oi.unit_price                                           AS old_cost_price,
+        COALESCE(
+            NULLIF(spa.retail_price, 0),
+            NULLIF(p.suggested_retail_price, 0),
+            oi.unit_price
+        )                                                       AS new_unit_price,
+        oi.quantity
+    FROM tb_order_item oi
+    JOIN tb_order o
+        ON o.id = oi.order_id
+        AND o.deleted_at IS NULL
+    JOIN tb_shop_package_allocation spa
+        ON spa.shop_id    = o.seller_shop_id
+        AND spa.package_id = oi.package_id
+        AND spa.deleted_at IS NULL
+    JOIN tb_package p
+        ON p.id = oi.package_id
+    WHERE oi.deleted_at IS NULL
+      AND oi.cost_price = 0              -- 尚未修复的记录
+      AND oi.unit_price > 0             -- 排除赠送套餐（unit_price=0）
+      AND oi.unit_price = spa.cost_price -- 旧语义标识：unit_price 存的是代理成本价
+)
+UPDATE tb_order_item oi
+SET
+    cost_price = c.old_cost_price,
+    unit_price = c.new_unit_price,
+    amount     = c.new_unit_price * c.quantity
+FROM correct_item_prices c
+WHERE oi.id = c.item_id;
+
+-- Step 2: 将 order.total_amount 更新为零售价合计
+UPDATE tb_order o
+SET total_amount = sub.new_total
+FROM (
+    SELECT
+        oi.order_id,
+        SUM(oi.unit_price * oi.quantity) AS new_total
+    FROM tb_order_item oi
+    WHERE oi.deleted_at IS NULL
+    GROUP BY oi.order_id
+) sub
+WHERE o.id          = sub.order_id
+  AND o.deleted_at IS NULL
+  AND o.total_amount != sub.new_total;  -- 只更新实际需要变动的
+
+-- Step 3: 回填 package_usage.retail_amount（修复后的零售价快照）
+UPDATE tb_package_usage pu
+SET retail_amount = o.total_amount
+FROM tb_order o
+WHERE pu.order_id     = o.id
+  AND pu.order_id    != 0
+  AND pu.retail_amount IS NULL
+  AND o.deleted_at   IS NULL;
+
+COMMIT;