76 lines
3.4 KiB
MySQL
76 lines
3.4 KiB
MySQL
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-- =============================================================================
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-- 借库转交 · 拒收须告知发起方
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--
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-- 背景
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-- 双向握手补上了「接收人确认」这一环，但只做了单向告知：接收人能看到待办，
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-- 发起方却对结果一无所知 —— 尤其是**被拒绝**时，物品责任仍在发起方手上，
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-- 他若不查列表就会误以为已经交接出去，责任链出现静默断点。
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--
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-- ---------------------------------------------------------------------------
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-- 为什么需要 reject_seen_at 这一列
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-- ACCEPTED 不需要告知（东西已经交出去了，发起方无需动作）；
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-- REJECTED 必须告知，且**必须能标记「已告知」** —— 否则发起方每次登录
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-- 都会收到同一条提醒，从「提醒」退化成「骚扰」。
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--
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-- 不宜用前端 sessionStorage 去重：换台电脑、换个浏览器就会重新提醒，
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-- 而这条信息的分量（责任归属）值得一个持久标记。
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--
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-- 语义
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-- reject_seen_at IS NULL 且 status='REJECTED' → 尚未告知发起方
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-- 发起方在前端看到提醒并确认后，写当前时间
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--
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-- ★ 存量已拒绝的流水一律标记为「已告知」
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-- 它们产生于本功能上线之前，追溯提醒只会打扰（实测仅 1 条：
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-- #22 测试 → 小龙虾，是验收时的测试数据）。新产生的拒绝才会触发提醒。
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--
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-- 幂等：带 IF NOT EXISTS，可重复执行。
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-- 执行：docker exec -i inventory_db psql -U test -d inventory_system < 本文件
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-- =============================================================================
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BEGIN;
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ALTER TABLE trans_borrow_transfer
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ADD COLUMN IF NOT EXISTS reject_seen_at timestamp without time zone;
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COMMENT ON COLUMN trans_borrow_transfer.reject_seen_at IS
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'发起方看到「被拒绝」提醒并确认的时间。NULL 且 status=REJECTED 表示尚未告知';
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-- 存量已拒绝的流转为已告知（本功能上线前的历史，不追溯打扰）
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UPDATE trans_borrow_transfer
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SET reject_seen_at = CURRENT_TIMESTAMP
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WHERE status = 'REJECTED'
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AND reject_seen_at IS NULL;
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-- 支撑「待告知发起方的拒绝」查询
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CREATE INDEX IF NOT EXISTS ix_trans_borrow_transfer_from_status
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ON trans_borrow_transfer (from_user_id, status);
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COMMIT;
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-- =============================================================================
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-- 执行后核对
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-- =============================================================================
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\echo '--- 1) 新列已就位 ---'
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SELECT column_name, data_type FROM information_schema.columns
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WHERE table_name = 'trans_borrow_transfer' AND column_name = 'reject_seen_at';
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\echo '--- 2) 拒绝流水均已标记为已告知（应为 0 行待告知）---'
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SELECT id, borrow_no, status, from_user_name, to_user_name, reject_seen_at
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FROM trans_borrow_transfer
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WHERE status = 'REJECTED' AND reject_seen_at IS NULL;
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\echo '--- 3) 全部流水一览 ---'
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SELECT id, status, from_user_name, to_user_name,
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CASE WHEN reject_seen_at IS NULL THEN '' ELSE '已告知' END AS 拒绝告知
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FROM trans_borrow_transfer ORDER BY id;
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-- =============================================================================
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-- 回滚段
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-- =============================================================================
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-- BEGIN;
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-- DROP INDEX IF EXISTS ix_trans_borrow_transfer_from_status;
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-- ALTER TABLE trans_borrow_transfer DROP COLUMN IF EXISTS reject_seen_at;
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-- COMMIT;
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