fix(scalar): guard against null tsType before 'in' operator check

Code-Hex · claude · Code-Hex · commit 3b81a99515df · 2026-04-25T23:11:20.000+09:00
Co-Authored-By: Claude Sonnet 4.6 &lt;noreply@anthropic.com&gt;
diff --git a/src/scalar.ts b/src/scalar.ts
@@ -28,7 +28,7 @@ export function buildScalarSchema(
   }
 
   const tsType = visitor.getScalarType(scalarName);
-  if (tsType in options.typeMap)
+  if (tsType != null && tsType in options.typeMap)
     return options.typeMap[tsType as keyof typeof options.typeMap];
 
   if (config.defaultScalarTypeSchema)

Original file line number	Diff line number	Diff line change
`@@ -28,7 +28,7 @@ export function buildScalarSchema(`
`28`	`28`	`}`
`29`	`29`
`30`	`30`	`const tsType = visitor.getScalarType(scalarName);`
`31`		`- if (tsType in options.typeMap)`
	`31`	`+ if (tsType != null && tsType in options.typeMap)`
`32`	`32`	`return options.typeMap[tsType as keyof typeof options.typeMap];`
`33`	`33`
`34`	`34`	`if (config.defaultScalarTypeSchema)`