SystemBase and Entities.With EntityQueryDesc

Hi everyone!

I'm sorry if some documentation already explains this... I couldn't find it.

I'm converting one of my

ComponentSystem 

systems to

SystemBase

. I was wondering how I can specify an 'or' statement inside the Entity query?
In the

OnCreate

method, the following EntityQuery is created:

Code (CSharp):

1.  
2.         var oldParents = new EntityQueryDesc
3.         {
4.             None = new ComponentType[] {typeof(Interactable)},
5.             All = new ComponentType[] {typeof(Tag_HasPopup)}
6.         };
7.      
8.         var deletedParents = new EntityQueryDesc
9.         {
10.             All = new ComponentType[] {typeof(DestroyEntity), typeof(Tag_HasPopup)}
11.         };
12.      
13.         _oldPopupParentsQuery = GetEntityQuery(oldParents, deletedParents);

The

_oldPopupParentsQuery 

is used inside the

OnUpdate

method:

Code (CSharp):

1. Entities.With(_oldPopupParentsQuery).ForEach(.....

In the new SystemBase, this is not possible anymore. We cannot provide an entityquery in our Entities anymore. Most of my systems could easily be converted to SystemBase by using WithNone, WithAll, WithAny.
How would one create this where e.g. WithNone<Interactable> is only used if it just has the component Tag_HasPopup?

I could ofcourse create two Entities.Foreach(), but I was curious whether it would be possible in one statement.

Thanks in advance!

 

No. But instead you use:

WithStoreEntityQueryInField

Code (CSharp):

1.  
2.     public class NewBehaviourSystem : SystemBase
3.     {
4.         EntityQuery Q;      
5.         protected override void OnUpdate()
6.         {
7.             Entities
8.             .WithStoreEntityQueryInField(ref Q)//this will generate the query before OnCreate
9.             .ForEach((ref SomeComponent a) =>
10.             {
11.                 //DoBehaviour
12.             }).ScheduleParallel();
13.         }
14.     }

this will code gen Query creation in OnCreateForCompiler which is before OnCreate.
you don't even need to override OnCreate