From 3d96d38aaabfe389ce5aa923e59843b2a4dbeab0 Mon Sep 17 00:00:00 2001
From: Oliwia Rogala <oliwia.rogala@smartbear.com>
Date: Fri, 21 Nov 2025 12:01:44 +0100
Subject: [PATCH] fix(ls): fix validation of writeOnly and readOnly

---
 .../services/validation/linter-functions.ts   |  3 ++-
 .../oas/schema-read-only-write-only.yaml      | 19 +++++++++++++++++++
 packages/apidom-ls/test/validate.ts           |  4 ++--
 3 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/packages/apidom-ls/src/services/validation/linter-functions.ts b/packages/apidom-ls/src/services/validation/linter-functions.ts
index dbc488801..58ca2565b 100644
--- a/packages/apidom-ls/src/services/validation/linter-functions.ts
+++ b/packages/apidom-ls/src/services/validation/linter-functions.ts
@@ -356,9 +356,10 @@ export const standardLinterfunctions: FunctionItem[] = [
 
       const fields = keys.map((key) => element.get(key)).filter(Boolean);
 
-      if (fields.length === 0) {
+      if (fields.length !== keys.length) {
         return true;
       }
+
       return !fields.every((field) => {
         const elValue = toValue(field);
 
diff --git a/packages/apidom-ls/test/fixtures/validation/oas/schema-read-only-write-only.yaml b/packages/apidom-ls/test/fixtures/validation/oas/schema-read-only-write-only.yaml
index 14832962d..37b5e940d 100644
--- a/packages/apidom-ls/test/fixtures/validation/oas/schema-read-only-write-only.yaml
+++ b/packages/apidom-ls/test/fixtures/validation/oas/schema-read-only-write-only.yaml
@@ -16,6 +16,9 @@ paths:
           application/json:
             schema:
               $ref: '#/components/schemas/PropertyToTest'
+          application/xml:
+            schema:
+              $ref: '#/components/schemas/PropertyToTestNoError'
 components:
   schemas:
     PropertyToTest:
@@ -35,3 +38,19 @@ components:
         fieldDate:
           type: string
           format: date-time
+    PropertyToTestNoError:
+      type: object
+      required:
+        - id
+        - fieldname
+        - fieldDate
+      properties:
+        id:
+          type: string
+          format: uuid
+          readOnly: true
+        fieldname:
+          type: string
+        fieldDate:
+          type: string
+          format: date-time
diff --git a/packages/apidom-ls/test/validate.ts b/packages/apidom-ls/test/validate.ts
index 19008cfe9..397cbb536 100644
--- a/packages/apidom-ls/test/validate.ts
+++ b/packages/apidom-ls/test/validate.ts
@@ -5187,11 +5187,11 @@ describe('apidom-ls-validate', function () {
         range: {
           end: {
             character: 10,
-            line: 27,
+            line: 30,
           },
           start: {
             character: 8,
-            line: 27,
+            line: 30,
           },
         },
         severity: 1,