From 7d4b009a88b4b9929a7c2518261dd158793acd55 Mon Sep 17 00:00:00 2001
From: Arnaud Moncel <arnaud.moncel43@gmail.com>
Date: Wed, 18 Feb 2026 10:34:06 +0100
Subject: [PATCH] fix(lazy join): avoid crash when using unknown field

---
 .../src/decorators/lazy-join/collection.ts                      | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/packages/datasource-customizer/src/decorators/lazy-join/collection.ts b/packages/datasource-customizer/src/decorators/lazy-join/collection.ts
index 0a73dd51f5..4068d688ef 100644
--- a/packages/datasource-customizer/src/decorators/lazy-join/collection.ts
+++ b/packages/datasource-customizer/src/decorators/lazy-join/collection.ts
@@ -76,6 +76,8 @@ export default class LazyJoinDecorator extends CollectionDecorator {
   }
 
   private refineField(field: string, projection: Projection): string {
+    if (!field.includes(':')) return field;
+
     const relationName = field.split(':')[0];
     const relation = this.schema.fields[relationName] as ManyToOneSchema;
     const relationProjection = projection.relations[relationName];