{"record":{"id":"74735a4b6976ca30","repo":"FyroxEngine/Fyrox","slug":"unable-to-get-a-resource-of-type-needed-type-uuid","errorCode":null,"errorMessage":"Unable to get a resource of type {needed_type_uuid} from resource UUID {}! The resource is loaded but its actual data has type {type_uuid}!","messagePattern":"Unable to get a resource of type (.+?) from resource UUID (.+?)! The resource is loaded but its actual data has type (.+?)!","errorType":"panic","errorClass":null,"httpStatus":null,"severity":"critical","filePath":"fyrox-resource/src/manager.rs","lineNumber":677,"sourceCode":"    /// is already loaded, then you can use [`Resource::data_ref`] to obtain a reference to the actual resource data.\n    /// Keep in mind, that this method will panic if the resource non in `Ok` state.\n    ///\n    /// ## Panic\n    ///\n    /// This method will panic, if type UUID of `T` does not match the actual type UUID of the resource. If this\n    /// is undesirable, use [`Self::try_request`] instead.\n    pub fn request_resource<T>(&self, resource: &mut Resource<T>)\n    where\n        T: TypedResourceData,\n    {\n        let mut state = self.state();\n\n        state.request_resource(&mut resource.untyped);\n\n        if let Some(type_uuid) = resource.untyped.type_uuid_non_blocking() {\n            let needed_type_uuid = <T as Reflect>::type_info().type_uuid;\n            if type_uuid != needed_type_uuid {\n                panic!(\n                    \"Unable to get a resource of type {needed_type_uuid} from resource UUID {}! The resource is \\\n                    loaded but its actual data has type {type_uuid}!\",\n                    resource.resource_uuid(),\n                );\n            }\n        }\n    }\n\n    /// Add the given resource to the resource manager, based on the resource's UUID,\n    /// without initiating the loading of the resource. The given resource is modified\n    /// to be a reference to the shared data of an existing resource with the same UUID.\n    pub fn add_resource<T>(&self, resource: &mut Resource<T>)\n    where\n        T: TypedResourceData,\n    {\n        let mut state = self.state();\n\n        state.add_resource(&mut resource.untyped);","sourceCodeStart":659,"sourceCodeEnd":695,"githubUrl":"https://github.com/FyroxEngine/Fyrox/blob/76c91aad8eca488ce527b1af707be8b3b24ad72d/fyrox-resource/src/manager.rs#L659-L695","documentation":"ResourceManager::request_resource<T>(uuid) fetches a resource by UUID and, once it is loaded, verifies the data's type UUID equals T's. If the resource loaded as a different type the manager panics with both UUIDs, since the typed handle T would be invalid.","triggerScenarios":"Calling request_resource::<T>(uuid) (or the from_file/build_from_memory paths that call it) where the resource stored under that UUID loads to a data type whose UUID differs from T.","commonSituations":"Same UUID used for different asset types across save files; scenes saved with one asset type then the asset replaced by another type; mismatched generic parameters in generated asset-import code.","solutions":["Request with the type matching the reported type_uuid in the panic message.","Fix the UUID or re-import/re-save the asset so it maps to a resource of type T.","Load untyped first and branch on the actual type_uuid before downcasting.","Check the loading path (from_file/build_from_memory) isn't associating the UUID with the wrong file/content."],"exampleFix":"// before\nlet tex: Texture = rm.request_resource(uuid)?; // uuid loads a Model\n// after\nlet model: Model = rm.request_resource(uuid)?;","handlingStrategy":"validation","validationCode":"let untyped = resource_manager.state().find_uuid(uuid);\nlet ok = untyped.type_uuid_non_blocking()\n    .map_or(true, |t| t == <T as Reflect>::type_info().type_uuid);\nif ok { let r: T = resource_manager.request_resource(uuid).unwrap(); }","typeGuard":null,"tryCatchPattern":null,"preventionTips":["Version saved scenes and re-validate UUID references after asset type changes.","Inspect type_uuid via untyped handles before typed requests.","Keep asset import pipelines deterministic so UUID->type mapping is stable.","Log resource UUIDs with types during serialization for debugging."],"tags":["rust","panic","uuid","type-mismatch","resource-manager"],"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"}