GetEntities Does not Exist?

I've been studiying the ECS & Job System, I've been following Brackey's tutorial. So I've been slapped in the face by this Error

"Assets\Scripts\Player.cs(21,27): error CS0103: The name 'GetEntities' does not exist in the current context"

Here's the code:

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using Unity.Entities;
5.  
6. public class Player : MonoBehaviour
7. {
8.     [SerializeField]
9.     private float speed;
10. }
11.  
12. public class WalkingSystem: ComponentSystem
13. {
14.     struct Components
15.     {
16.         public Player player;
17.         public Transform Transform;
18.     }
19.     protected override void OnUpdate()
20.     {
21.         foreach (var e in GetEntities<Components>())
22.         {
23.            Debug.Log("Hello World");
24.         }
25.     }
26. }
27.  

Also, The Entity Debugger is completelly empty, at all, It only says "No Worlds Selected" How can I setup this World thing?:


Thanks;
Arthur

 

I'm guessing you're trying to use a very old tutorial with a newer version.
https://docs.unity3d.com/Packages/com.unity.entities@0.11/manual/ecs_entities_foreach.html

Or try to find a newer tutorial.

 

Thank You for your comment! You have helped me a lot.