From 9dfb0a4815506f38a2f264af46bd22f7a51bb85e Mon Sep 17 00:00:00 2001
From: Owen Voke <development@voke.dev>
Date: Mon, 2 Sep 2024 11:11:27 +0100
Subject: [PATCH] fix: ensure `deprecationReason` is set for arguments

---
 CHANGELOG.md                             | 3 +++
 src/Schema/AST/ASTHelper.php             | 2 +-
 src/Schema/Factories/ArgumentFactory.php | 1 +
 3 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 103ab58a1..50d79e46d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,9 @@ You can find and compare releases at the [GitHub release page](https://github.co
 
 ## Unreleased
 
+### Fixed
+- Ensure `deprecationReason` is set on arguments and input fields https://github.com/nuwave/lighthouse/pull/2609
+
 ## v6.44.0
 
 ### Added
diff --git a/src/Schema/AST/ASTHelper.php b/src/Schema/AST/ASTHelper.php
index 0e41037d6..4f19ad136 100644
--- a/src/Schema/AST/ASTHelper.php
+++ b/src/Schema/AST/ASTHelper.php
@@ -327,7 +327,7 @@ public static function qualifiedArgType(
     }
 
     /** Given a collection of directives, returns the string value for the deprecation reason. */
-    public static function deprecationReason(EnumValueDefinitionNode|FieldDefinitionNode $node): ?string
+    public static function deprecationReason(EnumValueDefinitionNode|FieldDefinitionNode|InputValueDefinitionNode $node): ?string
     {
         $deprecated = Values::getDirectiveValues(
             DirectiveDefinition::deprecatedDirective(),
diff --git a/src/Schema/Factories/ArgumentFactory.php b/src/Schema/Factories/ArgumentFactory.php
index b27ea469c..d3bab6e1d 100644
--- a/src/Schema/Factories/ArgumentFactory.php
+++ b/src/Schema/Factories/ArgumentFactory.php
@@ -50,6 +50,7 @@ public function convert(InputValueDefinitionNode $definitionNode): array
             'name' => $definitionNode->name->value,
             'description' => $definitionNode->description?->value,
             'type' => $type,
+            'deprecationReason' => ASTHelper::deprecationReason($definitionNode),
             'astNode' => $definitionNode,
         ];