From 570b72c7782d6171eae73c72b2a48a43b0a001c2 Mon Sep 17 00:00:00 2001
From: Ukendio <ukendio@gmail.com>
Date: Sat, 13 Jul 2024 04:11:48 +0200
Subject: [PATCH] Return empty query when Without removes all archetypes

---
 src/init.luau | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/init.luau b/src/init.luau
index 3b6523a..2e9ea47 100644
--- a/src/init.luau
+++ b/src/init.luau
@@ -455,7 +455,10 @@ local function add(world: World, entityId: i53, componentId: i53)
 	local record = entityIndex.sparse[entityId]
 	local from = record.archetype
 	local to = archetypeTraverseAdd(world, componentId, from)
-	if from and not (from == world.ROOT_ARCHETYPE) then
+	if from == to then
+		return
+	end
+	if from then
 		moveEntity(entityIndex, entityId, record, to)
 	else
 		if #to.types > 0 then
@@ -793,6 +796,10 @@ local function preparedQuery(compatibleArchetypes: { Archetype },
 			end
 		end
 
+		if #compatibleArchetypes == 0 then
+		    return EmptyQuery
+		end
+
 		return self
 	end