It lose a component when I use EntityManager.Instantiate to instantiate a entity

I have a componentdata called Identifiction. I use GameObjectConversationUtility.ConvertGameObjectHierarchy to convert a prefab. There is a identification component in the converted prefab. But when I use it to instantiate a new entity, there is no identification on it.
Could you please tell me if there is any mistake in my code?
Thanks.

Code (CSharp):

1. [DisableAutoCreation]
2.     public class PrefabInstantiator : ComponentSystem
3.     {
4.      
5.         public Dictionary<AssetRef, Entity> Prefabs = new Dictionary<AssetRef, Entity>();
6.         protected override void OnUpdate()
7.         {
8.  
9.         }
10.        
11.         public (Entity,GameObject) Instantiate(AssetRef ObjectRef)
12.         {
13.          
14.             if (Prefabs.ContainsKey(ObjectRef))
15.             {
16.                 Entity e = EntityManager.Instantiate(Prefabs[ObjectRef]);
17.                 return (e, null);
18.             }else
19.             {
20.                 GameObject prefab = ObjectRef.Get<GameObject>();
21.                 GameObject instance = GameObject.Instantiate(prefab);
22.                 Entity e = GameObjectConversionUtility.ConvertGameObjectHierarchy(instance, World);
23.              
24.                 if (instance.GetComponent<WorldObject>().CanBeDelete())
25.                 {
26.                     GameObject.Destroy(instance);
27.                     Entity eprefab = GameObjectConversionUtility.ConvertGameObjectHierarchy(prefab, World);
28.                     EntityManager.AddComponentData<Prefab>(eprefab, new Prefab());
29.                     Prefabs.Add(ObjectRef,eprefab);
30.                     return (e, null);
31.                 }
32.                 return (e, instance);
33.             }
34.            
35.         }
36. }

 

You are instantiating a GameObject, then converting it twice, and adding a prefab component to one of the resulting Entities.

You really only need to convert the GameObject prefab, add the Prefab component to the resulting Entity, and then instantiate the Prefab entity.

 

Some prefab's instances can't be destroyed after instantiate because there are some monobehaviour can't convert to componentdata. So the system find the prefab that the instance of it can be destroyed and use the entity prefab to instantiate. Other prefabs must use GameObject.Instantiate to instantiate then convert.

 

Identification is a MonoBehaviour, isn't it...
Hybrid prefab entities aren't really a supported thing.