fix: Parse.Object.createWithoutData doesn't preserve object subclass (#2907)

Author: swittk

src/ParseObject.ts

@@ -1877,7 +1877,7 @@ class ParseObject<T extends Attributes = Attributes> {
    * @static
    * @returns {Parse.Object} A Parse.Object reference.
    */
-  static createWithoutData(id: string): ParseObject {
+  static createWithoutData<T extends ParseObject>(this: new (...args: any[]) => T, id: string): T {
     const obj = new this();
     obj.id = id;
     return obj;

types/ParseObject.d.ts

@@ -894,7 +894,7 @@ declare class ParseObject<T extends Attributes = Attributes> {
      * @static
      * @returns {Parse.Object} A Parse.Object reference.
      */
-    static createWithoutData(id: string): ParseObject;
+    static createWithoutData<T extends ParseObject>(this: new (...args: any[]) => T, id: string): T;
     /**
      * Creates a new instance of a Parse Object from a JSON representation.
      *

types/tests.ts

@@ -42,6 +42,14 @@ async function test_object() {
   // Create a new instance of that class.
   const gameScore = new GameScore();
 
+  // Expect that `createWithoutData` returns the types for the same classes (not generic ParseObjects)
+  // $ExpectType Game
+  Game.createWithoutData('someid');
+  // $ExpectType GameScore
+  GameScore.createWithoutData('scoreid');
+  // $ExpectType ParseUser<Attributes>
+  Parse.User.createWithoutData('someuser');
+
   gameScore.set('score', 1337);
   gameScore.set('playerName', 'Sean Plott');
   gameScore.set('cheatMode', false);
@@ -2375,4 +2383,3 @@ function testInitialize() {
   // Node - 1 param (should also work since javaScriptKey is optional in node)
   ParseNode.initialize('appId');
 }
-