From c0762ee3a97dc03d9bc155bcb6b2fe9f5b4a0ea9 Mon Sep 17 00:00:00 2001
From: Arda TANRIKULU <ardatanrikulu@gmail.com>
Date: Fri, 20 May 2022 05:49:33 +0300
Subject: [PATCH] Fix GraphQL v17 incompatibility issue #4468

---
 .changeset/hungry-jars-fetch.md   |  5 +++++
 packages/utils/src/visitResult.ts | 14 ++++++++++++--
 2 files changed, 17 insertions(+), 2 deletions(-)
 create mode 100644 .changeset/hungry-jars-fetch.md

diff --git a/.changeset/hungry-jars-fetch.md b/.changeset/hungry-jars-fetch.md
new file mode 100644
index 00000000000..1b489478b1e
--- /dev/null
+++ b/.changeset/hungry-jars-fetch.md
@@ -0,0 +1,5 @@
+---
+'@graphql-tools/utils': patch
+---
+
+Incoming GraphQL v17 compatibility #4468
diff --git a/packages/utils/src/visitResult.ts b/packages/utils/src/visitResult.ts
index 567b3cbba16..37b64d347a6 100644
--- a/packages/utils/src/visitResult.ts
+++ b/packages/utils/src/visitResult.ts
@@ -1,7 +1,6 @@
 import { getOperationASTFromRequest } from './getOperationASTFromRequest';
 import {
   GraphQLSchema,
-  getOperationRootType,
   Kind,
   GraphQLObjectType,
   FieldNode,
@@ -157,6 +156,17 @@ function visitErrorsByType(
   });
 }
 
+function getOperationRootType(schema: GraphQLSchema, operationDef: OperationDefinitionNode) {
+  switch (operationDef.operation) {
+    case 'query':
+      return schema.getQueryType();
+    case 'mutation':
+      return schema.getMutationType();
+    case 'subscription':
+      return schema.getSubscriptionType();
+  }
+}
+
 function visitRoot(
   root: any,
   operation: OperationDefinitionNode,
@@ -167,7 +177,7 @@ function visitRoot(
   errors: Maybe<ReadonlyArray<GraphQLError>>,
   errorInfo: ErrorInfo
 ): any {
-  const operationRootType = getOperationRootType(schema, operation);
+  const operationRootType = getOperationRootType(schema, operation)!;
   const collectedFields = collectFields(
     schema,
     fragments,