From d3a9995d0a252af877f401dc92802fb841291fa1 Mon Sep 17 00:00:00 2001
From: Hazelnoot <acomputerdog@gmail.com>
Date: Sun, 11 May 2025 06:02:52 -0400
Subject: [PATCH] use transaction to avoid unique constraint error when
 processing duplicate Add/Remove pinned note activities

---
 .../backend/src/core/NotePiningService.ts     | 32 +++++++++++--------
 1 file changed, 19 insertions(+), 13 deletions(-)

diff --git a/packages/backend/src/core/NotePiningService.ts b/packages/backend/src/core/NotePiningService.ts
index 6ab7268254..86f1a62d4a 100644
--- a/packages/backend/src/core/NotePiningService.ts
+++ b/packages/backend/src/core/NotePiningService.ts
@@ -10,7 +10,7 @@ import { IdentifiableError } from '@/misc/identifiable-error.js';
 import type { MiUser } from '@/models/User.js';
 import type { MiNote } from '@/models/Note.js';
 import { IdService } from '@/core/IdService.js';
-import type { MiUserNotePining } from '@/models/UserNotePining.js';
+import { MiUserNotePining } from '@/models/UserNotePining.js';
 import { RelayService } from '@/core/RelayService.js';
 import type { Config } from '@/config.js';
 import { UserEntityService } from '@/core/entities/UserEntityService.js';
@@ -18,6 +18,7 @@ import { ApDeliverManagerService } from '@/core/activitypub/ApDeliverManagerServ
 import { ApRendererService } from '@/core/activitypub/ApRendererService.js';
 import { bindThis } from '@/decorators.js';
 import { RoleService } from '@/core/RoleService.js';
+import type { DataSource } from 'typeorm';
 
 @Injectable()
 export class NotePiningService {
@@ -34,6 +35,9 @@ export class NotePiningService {
 		@Inject(DI.userNotePiningsRepository)
 		private userNotePiningsRepository: UserNotePiningsRepository,
 
+		@Inject(DI.db)
+		private readonly db: DataSource,
+
 		private userEntityService: UserEntityService,
 		private idService: IdService,
 		private roleService: RoleService,
@@ -60,21 +64,23 @@ export class NotePiningService {
 			throw new IdentifiableError('70c4e51f-5bea-449c-a030-53bee3cce202', 'No such note.');
 		}
 
-		const pinings = await this.userNotePiningsRepository.findBy({ userId: user.id });
+		await this.db.transaction(async tem => {
+			const pinings = await tem.findBy(MiUserNotePining, { userId: user.id });
 
-		if (pinings.length >= (await this.roleService.getUserPolicies(user.id)).pinLimit) {
-			throw new IdentifiableError('15a018eb-58e5-4da1-93be-330fcc5e4e1a', 'You can not pin notes any more.');
-		}
+			if (pinings.length >= (await this.roleService.getUserPolicies(user.id)).pinLimit) {
+				throw new IdentifiableError('15a018eb-58e5-4da1-93be-330fcc5e4e1a', 'You can not pin notes any more.');
+			}
 
-		if (pinings.some(pining => pining.noteId === note.id)) {
-			throw new IdentifiableError('23f0cf4e-59a3-4276-a91d-61a5891c1514', 'That note has already been pinned.');
-		}
+			if (pinings.some(pining => pining.noteId === note.id)) {
+				throw new IdentifiableError('23f0cf4e-59a3-4276-a91d-61a5891c1514', 'That note has already been pinned.');
+			}
 
-		await this.userNotePiningsRepository.insert({
-			id: this.idService.gen(),
-			userId: user.id,
-			noteId: note.id,
-		} as MiUserNotePining);
+			await tem.insert(MiUserNotePining, {
+				id: this.idService.gen(),
+				userId: user.id,
+				noteId: note.id,
+			});
+		});
 
 		// Deliver to remote followers
 		if (this.userEntityService.isLocalUser(user) && !note.localOnly && ['public', 'home'].includes(note.visibility)) {