Error using get_load_state with string asset path in Bevy: How to correctly use UntypedAssetId?

[xbz-24]

Hello Bevy Community,

I'm encountering an issue with AssetServer::get_load_state in my Bevy project where I'm trying to check if a specific asset is loaded. However, I'm running into a type conversion error. Here’s the problematic part of my code:

pub(crate) fn adjust_floor_transform(
    mut commands: Commands,
    mut transforms: Query<(Entity, &mut Transform, &Name)>,
    asset_server: Res<AssetServer>,
) {
    if asset_server.get_load_state("sponza/sponza.glb#Scene0") == Option::from(bevy::asset::LoadState::Loaded) {
        for (entity, mut transform, name) in transforms.iter_mut() {
            if name.as_str() == "SpecificFloorName" {
                transform.translation.y += 1.0;
                println!("Adjusted transform for {}", name.as_str());
            }
        }
    }
}

The error message I receive is:

error[E0277]: the trait bound `UntypedAssetId: From<&str>` is not satisfied
   --> src/setup.rs:21:36
    |
21  |     if asset_server.get_load_state("sponza/sponza.glb#Scene0") == Option::from(bevy::asset::LoadState::Loaded) {
    |                     -------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `From<&str>` is not implemented for `UntypedAssetId`, which is required by `&str: Into<UntypedAssetId>`
    |                     |
    |                     required by a bound introduced by this call
    |
    = help: the following other types implement trait `From<T>`:
              <UntypedAssetId as From<bevy::prelude::Handle<A>>>
              <UntypedAssetId as From<UntypedHandle>>
              <UntypedAssetId as From<AssetId<A>>>
              <UntypedAssetId as From<&bevy::prelude::Handle<A>>>
              <UntypedAssetId as From<&UntypedHandle>>
    = note: required for `&str` to implement `Into<UntypedAssetId>`
note: required by a bound in `AssetServer::get_load_state`
   --> /Users/xbz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bevy_asset-0.13.2/src/server/mod.rs:756:43
    |
756 |     pub fn get_load_state(&self, id: impl Into<UntypedAssetId>) -> Option<LoadState> {
    |                                           ^^^^^^^^^^^^^^^^^^^^ required by this bound in `AssetServer::get_load_state`

I understand that the issue arises because &str cannot be converted directly to UntypedAssetId, which is expected by get_load_state. How can I correctly convert a string path to an UntypedAssetId or is there a easier way to do this

[MrGVSV]

&str doesn't implement Into<UntypedAssetId>. You'll need to use a type that does (you can see some of the types that do in the error message), such as Handle<A>. So you could probably use something like:

pub(crate) fn adjust_floor_transform(
    mut commands: Commands,
    mut transforms: Query<(Entity, &mut Transform, &Name)>,
    asset_server: Res<AssetServer>,
) {
    let handle = asset_server.get_handle::<Scene>("sponza/sponza.glb#Scene0").expect("handle should be loading or loaded");
    if matches!(asset_server.get_load_state(&handle), Some(LoadState::Loaded)) {
        for (entity, mut transform, name) in transforms.iter_mut() {
            if name.as_str() == "SpecificFloorName" {
                transform.translation.y += 1.0;
                println!("Adjusted transform for {}", name.as_str());
            }
        }
    }
}