From a485c402541b14e7f8a00b50d4093e546be43db4 Mon Sep 17 00:00:00 2001
From: Valeri Karpov <val@karpov.io>
Date: Tue, 16 Feb 2021 17:14:59 -0500
Subject: [PATCH] fix(index.d.ts): make `SchemaTypeOptions#type` optional again
 to allow alternative typeKeys

Fix #9927
---
 index.d.ts                   | 2 +-
 test/typescript/main.test.js | 2 +-
 test/typescript/schema.ts    | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/index.d.ts b/index.d.ts
index d57c64706b9..4d4a6ee49a4 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -1365,7 +1365,7 @@ declare module 'mongoose' {
   }
 
   interface SchemaTypeOptions<T> {
-    type: T | SchemaDefinitionWithBuiltInClass<T>;
+    type?: T | SchemaDefinitionWithBuiltInClass<T>;
 
     /** Defines a virtual with the given name that gets/sets this path. */
     alias?: string;
diff --git a/test/typescript/main.test.js b/test/typescript/main.test.js
index 2d6b1188074..7dd5e51bef9 100644
--- a/test/typescript/main.test.js
+++ b/test/typescript/main.test.js
@@ -180,7 +180,7 @@ describe('typescript syntax', function() {
     }
     assert.equal(errors.length, 1);
     const messageText = errors[0].messageText.messageText;
-    assert.ok(/Type 'StringConstructor' is not assignable to type.*number/.test(messageText), messageText);
+    assert.ok(/Type '.*StringConstructor.*' is not assignable to type.*number/.test(messageText), messageText);
   });
 
   it('document', function() {
diff --git a/test/typescript/schema.ts b/test/typescript/schema.ts
index 4aed0505b31..43528dc4611 100644
--- a/test/typescript/schema.ts
+++ b/test/typescript/schema.ts
@@ -71,7 +71,7 @@ async function gh9857() {
   type UserModel = Model<UserDocument>;
 
   const schemaDefinition: UserSchemaDefinition = {
-    name: String,
+    name: { type: String },
     active: Boolean,
     points: Number
   };