ChildUpdateEntity object on POST

Pilz.Net/Api/Server/BaseChildItemHandler.cs

@@ -12,6 +12,11 @@ public abstract class BaseChildItemHandler<TEntity, TParent, TUpdateMsg>(IApiSer
     where TParent : class, IDataObject
     where TUpdateMsg : ApiMessage
 {
+    public class ChildEntityUpdate(TEntity entity, TParent parent, TUpdateMsg updateMsg, ApiRequestInfo reqest) : EntityUpdate(entity, updateMsg, reqest)
+    {
+        public TParent Parent { get; } = parent;
+    }
+
     protected virtual bool RegisterGetAll => true;
     protected virtual bool RegisterPost => true;
 
@@ -41,13 +46,18 @@ public abstract class BaseChildItemHandler<TEntity, TParent, TUpdateMsg>(IApiSer
     {
         if (!server.Manager.Find(parent, out TParent? parentEntity))
             return ApiResult.NotFound();
-        var entity = CreateNewEntity(msg);
+        var entity = CreateNewEntity(msg, parentEntity);
-        if (UpdateEntity(new(entity, msg, req)) is ApiResult result)
+        if (UpdateEntity(new ChildEntityUpdate(entity, parentEntity, msg, req)) is ApiResult result)
             return result;
         GetChilds(parentEntity).Add(entity);
         server.Manager.Save(parentEntity, true);
         return ToClient(entity).ToItemResult(HttpStatusCode.Created);
     }
 
+    protected virtual TEntity CreateNewEntity(TUpdateMsg msg, TParent parent)
+    {
+        return CreateNewEntity(msg);
+    }
+
     public abstract IList<TEntity> GetChilds(TParent parent);
 }