From b23f4f1fc5d39af1fa48c85868f47553b6e70f5b Mon Sep 17 00:00:00 2001
From: Valeri Karpov <val@karpov.io>
Date: Wed, 3 Mar 2021 11:22:59 -0500
Subject: [PATCH] fix(index.d.ts): allow creating statics without passing
 generics to `Schema` constructor

Fix #9969
---
 index.d.ts                |  2 +-
 test/typescript/models.ts | 17 ++++++++++++++++-
 2 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/index.d.ts b/index.d.ts
index 999fc7badb9..aa554d5166e 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -1052,7 +1052,7 @@ declare module 'mongoose' {
   type SchemaPreOptions = { document?: boolean, query?: boolean };
   type SchemaPostOptions = { document?: boolean, query?: boolean };
 
-  class Schema<DocType extends Document = Document, M extends Model<DocType> = Model<DocType>, SchemaDefinitionType = undefined> extends events.EventEmitter {
+  class Schema<DocType extends Document = Document, M extends Model<DocType> = Model<any>, SchemaDefinitionType = undefined> extends events.EventEmitter {
     /**
      * Create a new schema
      */
diff --git a/test/typescript/models.ts b/test/typescript/models.ts
index c65402c7829..b6917f876e8 100644
--- a/test/typescript/models.ts
+++ b/test/typescript/models.ts
@@ -1,4 +1,4 @@
-import { Schema, Document, Model, connection } from 'mongoose';
+import { Schema, Document, Model, connection, model } from 'mongoose';
 
 function conventionalSyntax(): void {
   interface ITest extends Document {
@@ -49,6 +49,21 @@ function insertManyTest() {
   });
 }
 
+function schemaStaticsWithoutGenerics() {
+  const UserSchema = new Schema({});
+  UserSchema.statics.static1 = function() { return ''; };
+
+  interface IUserDocument extends Document {
+    instanceField: string;
+  }
+  interface IUserModel extends Model<IUserDocument> {
+    static1: () => string;
+  }
+
+  const UserModel: IUserModel = model<IUserDocument, IUserModel>('User', UserSchema);
+  UserModel.static1();
+}
+
 const ExpiresSchema = new Schema({
   ttl: {
     type: Date,