add test of 13797

Author: pshaddel

test/types/schema.test.ts

@@ -1217,4 +1217,11 @@ function gh13800() {
     expectType<string>(this.lastName);
     expectError<string>(this.someOtherField);
   });
-}
+}
+
+async function gh13797() {
+  interface IUser {
+    name: string;
+  }
+  const schema2 = new Schema<IUser>({ name: { type: String, required: function () { expectType<IUser>(this); return true } } });
+}

types/schematypes.d.ts

@@ -39,7 +39,7 @@ declare module 'mongoose' {
 
   type DefaultType<T> = T extends Schema.Types.Mixed ? any : Partial<ExtractMongooseArray<T>>;
 
-  class SchemaTypeOptions<T, EnforcedDocType = {}> {
+  class SchemaTypeOptions<T, EnforcedDocType = any> {
     type?:
     T extends string ? StringSchemaDefinition :
       T extends number ? NumberSchemaDefinition :