{"record":{"id":"999f3035a365fe12","repo":"FyroxEngine/Fyrox","slug":"unable-to-get-a-resource-of-type-from-path","errorCode":null,"errorMessage":"Unable to get a resource of type {} from {path:?}! The resource has no associated loader for its extension and its actual data has some other data type!","messagePattern":"Unable to get a resource of type (.+?) from (.+?)! The resource has no associated loader for its extension and its actual data has some other data type!","errorType":"panic","errorClass":null,"httpStatus":null,"severity":"critical","filePath":"fyrox-resource/src/manager.rs","lineNumber":509,"sourceCode":"        T: TypedResourceData,\n    {\n        let path = path.as_ref();\n        let mut state = self.state();\n\n        let untyped = state.find(path);\n\n        let data_type_uuid_matches = untyped\n            .type_uuid_non_blocking()\n            .is_some_and(|uuid| uuid == <T as Reflect>::type_info().type_uuid);\n\n        if !data_type_uuid_matches {\n            let has_loader_for_extension = state\n                .loaders\n                .safe_lock()\n                .is_extension_matches_type::<T>(path);\n\n            if !has_loader_for_extension {\n                panic!(\n                    \"Unable to get a resource of type {} from {path:?}! The resource has no \\\n                    associated loader for its extension and its actual data has some other \\\n                    data type!\",\n                    <T as Reflect>::type_info().type_uuid,\n                )\n            }\n        }\n\n        Resource {\n            untyped,\n            phantom: PhantomData::<T>,\n        }\n    }\n\n    /// Find the resource for the given UUID without loading the resource.\n    /// If the resource is not already loading, then it will be returned in\n    /// the [`ResourceState::Unloaded`] state, and [`Self::request_resource`] may\n    /// be used to begin the loading process.","sourceCodeStart":491,"sourceCodeEnd":527,"githubUrl":"https://github.com/FyroxEngine/Fyrox/blob/76c91aad8eca488ce527b1af707be8b3b24ad72d/fyrox-resource/src/manager.rs#L491-L527","documentation":"ResourceManager::find<T>(path) only returns resources whose data type matches T. When there is no loader whose extension maps to T and the already-loaded resource at that path holds a different data type, the manager cannot satisfy the typed lookup and panics, including T's type UUID.","triggerScenarios":"Calling resource_manager.find::<T>(path) where path's extension has no registered loader for T and the cached untyped resource at that path was loaded as a different type (e.g. find::<Texture>(\"foo.png\") when foo.png is registered/loaded as something else, or extension maps to another type).","commonSituations":"Copying paths between typed resource managers (texture vs. model vs. sound); renaming a file to a wrong extension; expecting a generic loader for an unusual extension; type parameters swapped after refactors.","solutions":["Use the correct type parameter matching the loader/extension registered for the path.","Call find untyped (UntypedResource) if you need whatever resource exists at the path regardless of type.","Register a loader for that extension/type in ResourceManagerBuilder so is_extension_matches_type::<T> succeeds.","Fix the file extension or the path so it matches the intended resource type."],"exampleFix":"// before\nlet texture = resource_manager.find::<Texture>(\"data/model.fbx\")?; // wrong type for ext\n// after\nlet model = resource_manager.find::<Model>(\"data/model.fbx\")?;","handlingStrategy":"validation","validationCode":"// verify extension maps to the requested type before find::<T>\nlet ext = path.extension().and_then(|e| e.to_str()).unwrap_or(\"\");\ndebug_assert_eq!(ext, \"png\", \"texture path expected\");\nlet _ = resource_manager.find::<Texture>(path.clone()); // in dev builds","typeGuard":null,"tryCatchPattern":"// panics are not catchable safely; use untyped lookup then downcast\nlet untyped = resource_manager.find(path);\nif untyped.type_uuid() == Texture::type_uuid() { /* safe to use as Texture */ }","preventionTips":["Match the generic type to the file extension's registered loader.","Use untyped find + type_uuid check when the type is uncertain.","Register all custom loaders centrally in one builder function.","Avoid reusing one path for multiple resource types."],"tags":["rust","panic","type-mismatch","resource-manager","loader"],"backgroundTag":"type-mismatch","analyzedSha":"76c91aad8eca488ce527b1af707be8b3b24ad72d","analyzedAt":"2026-09-10T16:04:01.633Z","contentChangedAt":"2026-09-10T16:04:01.633Z","schemaVersion":2},"datasetVersion":"2026-09-16T09:17:16.951Z"}