From 64c5a5caedebecc3291e3cf08ec9010438cef743 Mon Sep 17 00:00:00 2001
From: Maxwell <145994855+ping-maxwell@users.noreply.github.com>
Date: Fri, 19 Sep 2025 00:12:38 +1000
Subject: [PATCH] fix(create-adapter): disable transaction by default (#4750)

---
 packages/better-auth/src/adapters/adapter-factory/index.ts    | 4 +++-
 packages/better-auth/src/adapters/adapter-factory/types.ts    | 3 ++-
 .../src/adapters/drizzle-adapter/drizzle-adapter.ts           | 2 +-
 .../better-auth/src/adapters/kysely-adapter/kysely-adapter.ts | 2 +-
 .../src/adapters/mongodb-adapter/mongodb-adapter.ts           | 2 +-
 .../better-auth/src/adapters/prisma-adapter/prisma-adapter.ts | 2 +-
 6 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/packages/better-auth/src/adapters/adapter-factory/index.ts b/packages/better-auth/src/adapters/adapter-factory/index.ts
index 54bbb052e2..28792595f0 100644
--- a/packages/better-auth/src/adapters/adapter-factory/index.ts
+++ b/packages/better-auth/src/adapters/adapter-factory/index.ts
@@ -9,6 +9,7 @@ import type {
 } from "../../types";
 import { generateId as defaultGenerateId, logger } from "../../utils";
 import type {
+	AdapterFactoryConfig,
 	AdapterFactoryOptions,
 	AdapterTestDebugLogs,
 	CleanedWhere,
@@ -69,7 +70,8 @@ export const createAdapterFactory =
 			supportsJSON: cfg.supportsJSON ?? false,
 			adapterName: cfg.adapterName ?? cfg.adapterId,
 			supportsNumericIds: cfg.supportsNumericIds ?? true,
-		};
+			transaction: cfg.transaction ?? false,
+		} satisfies AdapterFactoryConfig;
 
 		if (
 			options.advanced?.database?.useNumberId === true &&
diff --git a/packages/better-auth/src/adapters/adapter-factory/types.ts b/packages/better-auth/src/adapters/adapter-factory/types.ts
index 8319053b42..8b83829bb1 100644
--- a/packages/better-auth/src/adapters/adapter-factory/types.ts
+++ b/packages/better-auth/src/adapters/adapter-factory/types.ts
@@ -99,7 +99,8 @@ export interface AdapterFactoryConfig {
 	 * Execute multiple operations in a transaction.
 	 *
 	 * If the database doesn't support transactions, set this to `false` and operations will be executed sequentially.
-	 *
+	 * 
+	 * @default false
 	 */
 	transaction?:
 		| false
diff --git a/packages/better-auth/src/adapters/drizzle-adapter/drizzle-adapter.ts b/packages/better-auth/src/adapters/drizzle-adapter/drizzle-adapter.ts
index 226ccbeb22..e3ab63ffa0 100644
--- a/packages/better-auth/src/adapters/drizzle-adapter/drizzle-adapter.ts
+++ b/packages/better-auth/src/adapters/drizzle-adapter/drizzle-adapter.ts
@@ -361,7 +361,7 @@ export const drizzleAdapter = (db: DB, config: DrizzleAdapterConfig) => {
 			usePlural: config.usePlural ?? false,
 			debugLogs: config.debugLogs ?? false,
 			transaction:
-				(config.transaction ?? true)
+				(config.transaction ?? false)
 					? (cb) =>
 							db.transaction((tx: DB) => {
 								const adapter = createAdapterFactory({
diff --git a/packages/better-auth/src/adapters/kysely-adapter/kysely-adapter.ts b/packages/better-auth/src/adapters/kysely-adapter/kysely-adapter.ts
index 518c031498..75f1702ff2 100644
--- a/packages/better-auth/src/adapters/kysely-adapter/kysely-adapter.ts
+++ b/packages/better-auth/src/adapters/kysely-adapter/kysely-adapter.ts
@@ -372,7 +372,7 @@ export const kyselyAdapter = (
 					: true,
 			supportsJSON: false,
 			transaction:
-				(config?.transaction ?? true)
+				(config?.transaction ?? false)
 					? (cb) =>
 							db.transaction().execute((trx) => {
 								const adapter = createAdapterFactory({
diff --git a/packages/better-auth/src/adapters/mongodb-adapter/mongodb-adapter.ts b/packages/better-auth/src/adapters/mongodb-adapter/mongodb-adapter.ts
index 447783e631..f0624d4bfc 100644
--- a/packages/better-auth/src/adapters/mongodb-adapter/mongodb-adapter.ts
+++ b/packages/better-auth/src/adapters/mongodb-adapter/mongodb-adapter.ts
@@ -282,7 +282,7 @@ export const mongodbAdapter = (db: Db, config?: MongoDBAdapterConfig) => {
 			},
 			supportsNumericIds: false,
 			transaction:
-				config?.client && (config?.transaction ?? true)
+				config?.client && (config?.transaction ?? false)
 					? async (cb) => {
 							if (!config.client) {
 								return cb(lazyAdapter!(lazyOptions!));
diff --git a/packages/better-auth/src/adapters/prisma-adapter/prisma-adapter.ts b/packages/better-auth/src/adapters/prisma-adapter/prisma-adapter.ts
index 140de02aa0..08b2f09414 100644
--- a/packages/better-auth/src/adapters/prisma-adapter/prisma-adapter.ts
+++ b/packages/better-auth/src/adapters/prisma-adapter/prisma-adapter.ts
@@ -241,7 +241,7 @@ export const prismaAdapter = (prisma: PrismaClient, config: PrismaConfig) => {
 			usePlural: config.usePlural ?? false,
 			debugLogs: config.debugLogs ?? false,
 			transaction:
-				(config.transaction ?? true)
+				(config.transaction ?? false)
 					? (cb) =>
 							(prisma as PrismaClientInternal).$transaction((tx) => {
 								const adapter = createAdapterFactory({