From 65085e2a1d8cc2ee5173831d65516176204003eb Mon Sep 17 00:00:00 2001
From: Helix <hissyu@hotmail.com>
Date: Tue, 12 May 2026 12:00:26 +0800
Subject: [PATCH] export `resource_entity` in `EntityWorldMut` and
 `TemplateContext`

---
 crates/bevy_ecs/src/template.rs                 |  6 ++++++
 .../src/world/entity_access/world_mut.rs        | 17 ++++++++++++++++-
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/crates/bevy_ecs/src/template.rs b/crates/bevy_ecs/src/template.rs
index 7a5756d540548..fb46601be7988 100644
--- a/crates/bevy_ecs/src/template.rs
+++ b/crates/bevy_ecs/src/template.rs
@@ -84,6 +84,12 @@ impl<'a, 'w> TemplateContext<'a, 'w> {
     pub fn resource_mut<R: Resource<Mutability = Mutable>>(&mut self) -> Mut<'_, R> {
         self.entity.resource_mut()
     }
+
+    /// Retrieves the entity associated with the given resource `R`, if it exists.
+    #[inline]
+    pub fn resource_entity<R: Resource>(&self) -> Option<Entity> {
+        self.entity.resource_entity::<R>()
+    }
 }
 
 /// A mapping from from an entity reference's (scope, index) to a contiguous flat index that uniquely
diff --git a/crates/bevy_ecs/src/world/entity_access/world_mut.rs b/crates/bevy_ecs/src/world/entity_access/world_mut.rs
index d77a26315b30f..d78e36aaa1523 100644
--- a/crates/bevy_ecs/src/world/entity_access/world_mut.rs
+++ b/crates/bevy_ecs/src/world/entity_access/world_mut.rs
@@ -14,7 +14,7 @@ use crate::{
         ReleaseStateQueryData, SingleEntityQueryData,
     },
     relationship::RelationshipHookMode,
-    resource::Resource,
+    resource::{Resource, ResourceEntities},
     storage::{SparseSets, Table},
     template::{EntityScopes, ScopedEntities, Template, TemplateContext},
     world::{
@@ -732,6 +732,21 @@ impl<'w> EntityWorldMut<'w> {
         })
     }
 
+    /// Retrieves this world's [`ResourceEntities`].
+    #[inline]
+    #[track_caller]
+    pub fn resource_entities(&self) -> &ResourceEntities {
+        self.world.resource_entities()
+    }
+
+    /// Retrieves the [`Entity`] associated with the resource of type `R`, if it exists.
+    #[inline]
+    #[track_caller]
+    pub fn resource_entity<R: Resource>(&self) -> Option<Entity> {
+        let component_id = self.world.component_id::<R>()?;
+        self.world.resource_entities().get(component_id)
+    }
+
     /// Retrieves the change ticks for the given component. This can be useful for implementing change
     /// detection in custom runtimes.
     ///