ecs prefab

using Unity.Assertions;
using Unity.Entities;
using UnityEngine;

namespace ScriptsSandbox
{
    [ExecuteAlways]
    public class PrefabAuthoring : MonoBehaviour
    {
        void OnEnable()
        {
            var entityManager = World.DefaultGameObjectInjectionWorld.EntityManager;
            var entityPrefab = entityManager.CreateEntity(
                typeof(Prefab),
                typeof(MyFunkyComponent));

            Assert.IsTrue(entityPrefab != Entity.Null);


            var query = World.DefaultGameObjectInjectionWorld.EntityManager.CreateEntityQuery(
                ComponentType.ReadOnly<MyFunkyComponent>(),
                ComponentType.ReadOnly<Prefab>());

            var prefabs = query.ToEntityArray(Unity.Collections.Allocator.Temp);

            Debug.Log($"First Query found {prefabs.Length} prefabs");
            prefabs.Dispose();

            var queryPrefab = World.DefaultGameObjectInjectionWorld.EntityManager.CreateEntityQuery(new EntityQueryDesc
            {
                All  = new[]
                {
                    ComponentType.ReadOnly<MyFunkyComponent>()
                },
                Options = EntityQueryOptions.Default | EntityQueryOptions.IncludePrefab
            });

            var prefabs2 = queryPrefab.ToEntityArray(Unity.Collections.Allocator.Temp);
            Debug.Log($"Second Query found {prefabs2.Length} prefabs");
            prefabs2.Dispose();

            entityManager.DestroyEntity(entityPrefab);
        }
    }

    public struct MyFunkyComponent : IComponentData
    {
        public float Size;
    }
}