FyroxEngine/Fyrox · warning

Unable to get style property, because the resource is…

Error message

Unable to get style property, because the resource is invalid!

What it means

In StyleResourceExt::get (fyrox-ui/src/style/resource.rs:180), this fires when the StyleResource's underlying resource state cannot be entered to borrow its data (state.data_ref() returns None), which happens when the style resource has been freed, unloaded, or otherwise marked invalid — e.g. the resource file was deleted/failed to load or the handle's resource was destroyed. It is a silent guard: the method logs the error and returns None, so callers that pattern-match the Some(P) value (such as update) simply observe a missing style property rather than a panic. The input at fault is not the property name but the invalid resource itself; the generic sentinel pattern mirrors the sibling set() guard, so a None here can mean either 'property absent' or 'resource invalid' and callers cannot distinguish the two without checking resource validity separately.

Solutions

1. Wait for the style resource to load before building/querying widget styles
2. Use `get_or`/`get_or_default` so a sensible fallback is returned while logging still occurs
3. Verify the resource handle/path is valid and its load succeeded
4. Check the returned Option and use a fallback instead of unwrapping

Example fix

// before
let brush: Brush = style.get("Brush::Text").unwrap_or_default();
// after
let brush: Brush = style.get_or("Brush::Text", Brush::Solid(Color::WHITE));

fn style_ready(style: &StyleResource) -> bool {
    style.state().data_ref().is_some()
}

fn loaded(style: &StyleResource) -> bool { style.state().data_ref().is_some() }

let brush: Option<Brush> = if style.state().data_ref().is_some() {
    style.get("Brush::Text")
} else { None };
let brush = brush.unwrap_or(Brush::Solid(Color::WHITE));

When it happens

Trigger: Calling `style.get::<P>("name")` on an invalid/pending style resource; fetching style values during widget update (`update`) before the style resource finished loading.

Common situations: Theme lookups during early UI construction before async resource load completes; deleted or failed style resources.

Understand the failure class

Background: 'Could not be found', 'does not exist', 'not found in database': the resource-not-found family when an ID, slug, key, or URI lookup comes back empty — this error's family across 20 libraries.

Related errors

• Unable to set style property, because the resource is…
• Cannot add window to split tile
• Cannot subtract window from split tile
• Type mismatch!
• Resource error for untyped resource

AI-assisted analysis of FyroxEngine/Fyrox@76c91aad8e (2026-09-10). Data as JSON: /api/errors/f337269af06ea3a5. Report an issue: GitHub.

Appendix: source

Thrown at fyrox-ui/src/style/resource.rs:180

impl StyleResourceExt for StyleResource {
    fn set(&self, name: impl Into<ImmutableString>, property: impl Into<StyleProperty>) {
        let mut state = self.state();
        if let Some(data) = state.data() {
            data.set(name, property);
        } else {
            Log::err("Unable to set style property, because the resource is invalid!")
        }
    }

    fn get<P>(&self, name: impl Into<ImmutableString>) -> Option<P>
    where
        StyleProperty: IntoPrimitive<P>,
    {
        let state = self.state();
        if let Some(data) = state.data_ref() {
            data.get(name)
        } else {
            Log::err("Unable to get style property, because the resource is invalid!");
            None
        }
    }

    fn get_or<P>(&self, name: impl Into<ImmutableString>, default: P) -> P
    where
        StyleProperty: IntoPrimitive<P>,
    {
        let state = self.state();
        if let Some(data) = state.data_ref() {
            data.get_or(name, default)
        } else {
            Log::err("Unable to get style property, because the resource is invalid!");
            default
        }
    }

    fn get_or_default<P>(&self, name: impl Into<ImmutableString>) -> P

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