From 90fbc83823bf551ea705d5ec167c10db05f08df9 Mon Sep 17 00:00:00 2001
From: ktmouk <ktmouk@gmail.com>
Date: Mon, 16 Mar 2026 22:36:19 +0900
Subject: [PATCH] fix: add has trap to client proxy for in operator support

---
 src/contest.test.ts | 12 ++++++++++++
 src/context.ts      |  4 ++++
 2 files changed, 16 insertions(+)

diff --git a/src/contest.test.ts b/src/contest.test.ts
index 384fcc1..4b70541 100644
--- a/src/contest.test.ts
+++ b/src/contest.test.ts
@@ -140,4 +140,16 @@ describe('createContext', () => {
     const [ctx, prisma] = await makeContext('transactionStarted');
     expect(prisma.meta).toEqual((ctx.client as PrismaClientStub).meta);
   });
+
+  it('has trap returns true for properties on the transaction client', async () => {
+    const [ctx] = await makeContext('transactionStarted');
+    expect('$connect' in ctx.client).toBe(true);
+    expect('meta' in ctx.client).toBe(true);
+    expect('nonExistentProp' in ctx.client).toBe(false);
+  });
+
+  it('has trap returns false when no transaction is active', async () => {
+    const [ctx] = await makeContext('transactionPending');
+    expect('$connect' in ctx.client).toBe(false);
+  });
 });
diff --git a/src/context.ts b/src/context.ts
index 1d96892..18f88c7 100644
--- a/src/context.ts
+++ b/src/context.ts
@@ -86,6 +86,10 @@ export function createContext(options: PrismaPostgresEnvironmentOptions) {
    * error message.
    */
   const client: PrismaClientLike = new Proxy({} as PrismaClientLike, {
+    has: (_target, name) => {
+      if (!transactionClient) return false;
+      return name in transactionClient;
+    },
     get: (_target, name: keyof PrismaClientLike | symbol) => {
       if (!transactionClient) {
         throw new Error(