From 876a6f0be1d5ceb939943f8cb4bee584567799e5 Mon Sep 17 00:00:00 2001
From: rajanpanth <rajan.pantha@samriddhicollege.edu.np>
Date: Sun, 9 Aug 2026 11:35:06 +0545
Subject: [PATCH] fix(Length): don't reference unset max/min constraint in
 error message

---
 src/decorator/string/Length.ts                      |  6 +++++-
 .../validation-functions-and-decorators.spec.ts     | 13 +++++++++++++
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/src/decorator/string/Length.ts b/src/decorator/string/Length.ts
index 04427bdfb7..c56fe44fed 100644
--- a/src/decorator/string/Length.ts
+++ b/src/decorator/string/Length.ts
@@ -26,7 +26,11 @@ export function Length(min: number, max?: number, validationOptions?: Validation
         defaultMessage: buildMessage((eachPrefix, args) => {
           const isMinLength = args?.constraints[0] !== null && args?.constraints[0] !== undefined;
           const isMaxLength = args?.constraints[1] !== null && args?.constraints[1] !== undefined;
-          if (isMinLength && (!args.value || args.value.length < args?.constraints[0])) {
+          if (isMinLength && !isMaxLength) {
+            return eachPrefix + '$property must be longer than or equal to $constraint1 characters';
+          } else if (isMaxLength && !isMinLength) {
+            return eachPrefix + '$property must be shorter than or equal to $constraint2 characters';
+          } else if (isMinLength && (!args.value || args.value.length < args?.constraints[0])) {
             return eachPrefix + '$property must be longer than or equal to $constraint1 characters';
           } else if (isMaxLength && args.value.length > args?.constraints[1]) {
             return eachPrefix + '$property must be shorter than or equal to $constraint2 characters';
diff --git a/test/functional/validation-functions-and-decorators.spec.ts b/test/functional/validation-functions-and-decorators.spec.ts
index 4c266f02ee..b59f7b39ff 100644
--- a/test/functional/validation-functions-and-decorators.spec.ts
+++ b/test/functional/validation-functions-and-decorators.spec.ts
@@ -4267,6 +4267,19 @@ describe('Length', () => {
     const message = 'someProperty must be shorter than or equal to ' + constraintToString(constraint2) + ' characters';
     return checkReturnedError(new MyClass(), ['aaaa', 'azzazza'], validationType, message);
   });
+
+  describe('when only min is specified and the value is not a string', () => {
+    class MinOnlyClass {
+      @Length(constraint1)
+      someProperty: any;
+    }
+
+    it('should not reference the unset max constraint in the error message', () => {
+      const validationType = 'isLength';
+      const message = 'someProperty must be longer than or equal to ' + constraintToString(constraint1) + ' characters';
+      return checkReturnedError(new MinOnlyClass(), [123, true, { foo: 'bar' }], validationType, message);
+    });
+  });
 });
 
 describe('MinLength', () => {