yggdrasil/migrations/008_comments_cascade.sql
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security: fix critical issues from repository review
P0 blockers:
- Fix migration numbering conflict and duplicate indexes
- Change comments.post_id FK to ON DELETE CASCADE
- Restrict public post detail endpoint to published posts only
- Fix rate-limiting IP extraction and fallback to ConnectInfo
- Harden HTML sanitizer: deny unknown URL schemes, restrict data URIs
- Remove session token from login response body
- Enforce image pixel/dimension limits on upload and serving

P1 high-risk:
- Validate uploads by magic bytes and decode GIF/WebP
- Add pagination/rate-limiting to search, tag posts, and comments
- Make first-admin registration and slug uniqueness check atomic
- HTML-escape comment author fields
- Improve HTML minify cache key and skip admin/error responses
- Add mobile navigation menu

P2 accessibility/quality:
- Associate form labels with inputs
- Key PostDetail article by slug to re-init scripts on navigation
- Improve image viewer keyboard accessibility
- Make theme toggle SSR-friendly and add aria-label
- Invalidate slug 404 cache on create and pending count on new comment
- Deduplicate tags case-insensitively

P3 cleanup:
- Remove unused tower-http dependency, expand make clean
- Configure DB pool timeouts and verified recycling
- Run background cleanup tasks immediately on startup
- Use SHA-256 for stable disk cache keys
- Log DB errors with Display instead of Debug
- Update README migration instructions

All tests pass (321), clippy clean, dx check clean.
2026-06-17 10:34:14 +08:00

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-- 将 comments.post_id 外键从 RESTRICT 改为 CASCADE
-- 使回收站清理/自动清理能够删除仍有评论的文章。
ALTER TABLE comments
DROP CONSTRAINT IF EXISTS comments_post_id_fkey;
ALTER TABLE comments
ADD CONSTRAINT comments_post_id_fkey
FOREIGN KEY (post_id) REFERENCES posts(id) ON DELETE CASCADE;