From 5248305fa9a966b3209b59a22928156c4929dc01 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E3=81=BF=E3=81=A6=E3=82=8B=E3=81=9E?= <miteruzo@naver.com>
Date: Mon, 9 Mar 2026 07:19:40 +0900
Subject: [PATCH]

---
 ...C%E3%83%96%E3%83%AB%E5%AE%9A%E7%BE%A9%E6%9B%B8%3Amaterials.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/%E3%83%86%E3%83%BC%E3%83%96%E3%83%AB%E5%AE%9A%E7%BE%A9%E6%9B%B8%3Amaterials.md b/%E3%83%86%E3%83%BC%E3%83%96%E3%83%AB%E5%AE%9A%E7%BE%A9%E6%9B%B8%3Amaterials.md
index 4ae899c..e18ceee 100644
--- a/%E3%83%86%E3%83%BC%E3%83%96%E3%83%AB%E5%AE%9A%E7%BE%A9%E6%9B%B8%3Amaterials.md
+++ b/%E3%83%86%E3%83%BC%E3%83%96%E3%83%AB%E5%AE%9A%E7%BE%A9%E6%9B%B8%3Amaterials.md
@@ -14,6 +14,7 @@
   - url
   - canonical
 - 外部キー:
+  - parent_id -> materials.id
   - tag_id -> tags.id
 - チェック:
   - url IS NOT NULL OR canonical IS NOT NULL