Question Error HasComponent when update ECS 0.50 to 1.0

This is my code who work correctly in ECS 0.50

Code (CSharp):

1.  
2. Entities.ForEach((Entity entity, ref LocalTransform transform, in EnemyFollow enemyFollow) => {
3.   if (enemyFollow.entity != Entity.Null && HasComponent<LocalTransform>(enemyFollow.entity)) {
4.         .....
5.         transform.Rotate = newRotate
6.  } });
7.  

When I update to ECS 1.0 I have this error

Entities.ForEach cannot use component access method HasComponent with the same type LocalTransform that is used in lambda parameters with write access (as ref).

Has anyone had this problem before and know how to fix it?

 

var translations = SystemAPI.GetComponentLookup<LocalTransform>(true);

Entities
.WithNativeDisableContainerSafetyRestriction(translations)
.ForEach((Entity theUnit, ref LocalTransform trans) =>
{


translations.HasComponent(enemyFollow.entity)

 

Cannot read & write same location.

Use ComponentLookup instead as mentioned, except do not put <T> into EFE query parameters.
No need to disable safety checks in this case.

 

Thenks for help,

I have another question. In my old code I had something like this

Code (CSharp):

1.  var buildPhysicWorld = Game.entityManager.World.GetExistingSystem<BuildPhysicsWorld>();

after upgrading to 1.0, i changed this code to this

Code (CSharp):

1. SystemAPI.GetSingleton<PhysicsWorldSingleton>();

This code snippet is in the MonoBehaviour component.
I am getting this error, does anyone know how to fix it?
You may not use the SystemAPI member `GetSingleton` outside of a system. SystemAPI members rely on setup from the containing system.

 

SystemAPI codegen outside of systems is not supported.
Either put your method inside the system or do it the old way.