{"record":{"id":"de53201e4c067c6f","repo":"FyroxEngine/Fyrox","slug":"failed-to-revert-property-path-reason-no-such","errorCode":null,"errorMessage":"Failed to revert property {path}. Reason: no such property!","messagePattern":"Failed to revert property (.+?)\\. Reason: no such property!","errorType":"console","errorClass":null,"httpStatus":null,"severity":"error","filePath":"fyrox-graph/src/lib.rs","lineNumber":597,"sourceCode":"                });\n\n            // Try to apply it to the child.\n            if need_revert {\n                if let Some(parent_value) = parent_value {\n                    let mut was_set = false;\n\n                    let mut parent_value = Some(parent_value);\n\n                    self.inner_mut().set_field_by_path(\n                        path,\n                        parent_value.take().unwrap(),\n                        &mut |result| match result {\n                            Ok(old_value) => {\n                                previous_value = Some(old_value);\n\n                                was_set = true;\n                            }\n                            Err(_) => Log::err(format!(\n                                \"Failed to revert property {path}. Reason: no such property!\"\n                            )),\n                        },\n                    );\n\n                    if was_set {\n                        // Reset modified flag.\n                        reset_property_modified_flag(self.inner_mut(), path);\n                    }\n                }\n            }\n        }\n\n        previous_value\n    }\n\n    /// Tries to downcast self to the specified type, or if it is not possible, tries to find a\n    /// field of the specified type.","sourceCodeStart":579,"sourceCodeEnd":615,"githubUrl":"https://github.com/FyroxEngine/Fyrox/blob/76c91aad8eca488ce527b1af707be8b3b24ad72d/fyrox-graph/src/lib.rs#L579-L615","documentation":"Logged in fyrox-graph's revert_inheritable_property when applying the reverted (parent) value to the child property fails because the property could not be set — resolve_path_mut on the set operation returned Err, summarized as 'no such property'. Despite the message wording, this fires on the final set-by-path step after a successful resolution earlier, often due to mutability/type resolution failure on the same path.","triggerScenarios":"The final set_field_by_path-style resolve fails: path was resolvable earlier but the setter path resolution failed (e.g. field inside a non-mutable context, or path refers to a property removed in between), typically after schema/version drift.","commonSituations":"Undo/revert operations in the Fyrox editor after engine upgrade, reverting properties on nodes whose composition changed (widget children added/removed), concurrent modification invalidating cached paths.","solutions":["Re-resolve the path immediately before setting; don't cache paths across structural changes","Verify the node still contains the property at set time (no intervening removal)","Rebuild/re-save the scene with the current engine version","Log the underlying resolve error detail to distinguish 'not found' from 'not settable'"],"exampleFix":null,"handlingStrategy":"try-catch","validationCode":"// resolve read-only first, then attempt the write only if it resolved\nlet mut ok = false;\nnode.resolve_path(path, &mut |r| ok = r.is_ok());\nif !ok { return; }","typeGuard":null,"tryCatchPattern":"match result {\n    Ok(old_value) => { previous_value = Some(old_value); was_set = true; }\n    Err(e) => Log::err(format!(\"revert {path} failed: {e:?}\")),\n}","preventionTips":["Don't cache property paths across structural scene changes","Log full resolve errors, not a canned 'no such property'","Test undo/revert flows after every engine upgrade"],"tags":["reflection","property-path","fyrox","undo"],"backgroundTag":"resource-not-found","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"}