00ca4ff3d6
The server-side move cycle guard (getPageBreadCrumbs) and the move UPDATE ran
as two separate, unlocked statements. Two concurrent moves ("A under B" and
"B under A") could each read the same pre-write acyclic snapshot, both pass the
guard, then persist A.parentPageId=B AND B.parentPageId=A — a parent/child
cycle (TOCTOU, #207 #7).
Run the cycle check and the UPDATE inside one transaction (executeTx) guarded
by a per-space advisory lock (pg_advisory_xact_lock, held until COMMIT) so all
moves within a space serialize: the second mover blocks until the first commits
and then sees the freshly written parent, so its guard rejects the cycle.
getPageBreadCrumbs gains an optional trx so the check runs on the locked snapshot.
Adds an integration test driving two opposing concurrent movePage calls and
asserting no cycle ever persists and exactly one move is rejected. Updates the
movePage unit-test stubs for the new transactional path.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
A progressive Node.js framework for building efficient and scalable server-side applications.
Description
Nest framework TypeScript starter repository.
Installation
$ npm install
Running the app
# development
$ npm run start
# watch mode
$ npm run start:dev
# production mode
$ npm run start:prod
Migrations
# This creates a new empty migration file named 'init'
$ npm run migration:create --name=init
# Generates 'init' migration file from existing entities to update the database schema
$ npm run migration:generate --name=init
# Runs all pending migrations to update the database schema
$ npm run migration:run
# Reverts the last executed migration
$ npm run migration:revert
# Reverts all migrations
$ npm run migration:revert
# Shows the list of executed and pending migrations
$ npm run migration:show
## Test
```bash
# unit tests
$ npm run test
# e2e tests
$ npm run test:e2e
# test coverage
$ npm run test:cov
Support
Nest is an MIT-licensed open source project. It can grow thanks to the sponsors and support by the amazing backers. If you'd like to join them, please read more here.
Stay in touch
- Author - Kamil Myśliwiec
- Website - https://nestjs.com
- Twitter - @nestframework
License
Nest is MIT licensed.