{"record":{"id":"6569284b36bccac2","repo":"leptos-rs/leptos","slug":"no-reactive-owner-656928","errorCode":null,"errorMessage":"no reactive owner","messagePattern":"no reactive owner","errorType":"panic","errorClass":null,"httpStatus":null,"severity":"error","filePath":"tachys/src/reactive_graph/owned.rs","lineNumber":21,"sourceCode":"    hydration::Cursor,\n    prelude::Mountable,\n    ssr::StreamBuilder,\n    view::{add_attr::AddAnyAttr, Position, PositionState, Render, RenderHtml},\n};\nuse reactive_graph::{computed::ScopedFuture, owner::Owner};\nuse std::mem;\n\n/// A view wrapper that sets the reactive [`Owner`] to a particular owner whenever it is rendered.\n#[derive(Debug, Clone)]\npub struct OwnedView<T> {\n    owner: Owner,\n    view: T,\n}\n\nimpl<T> OwnedView<T> {\n    /// Wraps a view with the current owner.\n    pub fn new(view: T) -> Self {\n        let owner = Owner::current().expect(\"no reactive owner\");\n        Self { owner, view }\n    }\n\n    /// Wraps a view with the given owner.\n    pub fn new_with_owner(view: T, owner: Owner) -> Self {\n        Self { owner, view }\n    }\n}\n\n/// Retained view state for an [`OwnedView`].\n#[derive(Debug, Clone)]\npub struct OwnedViewState<T>\nwhere\n    T: Mountable,\n{\n    // note: the drop order of the fields matters here\n    // dropping `state` before `owner` ensures that cleanups happen\n    // from the bottom up: i.e., the child state is dropped before","sourceCodeStart":3,"sourceCodeEnd":39,"githubUrl":"https://github.com/leptos-rs/leptos/blob/32d20f6c9d517451d77beb68d88c7716823dac41/tachys/src/reactive_graph/owned.rs#L3-L39","documentation":"OwnedView::new tries to attach the given view to the currently active reactive Owner via Owner::current(). If no owner is in scope, it panics with 'no reactive owner'. The library throws it because an owned view must be cleaned up by some owner; without one it would leak or dangle.","triggerScenarios":"Creating an OwnedView outside any reactive ownership context: before the reactive runtime is initialized, inside a plain thread/task without entering an owner, or after the owning scope has been dropped.","commonSituations":"Building views in a tokio spawn without owner context; tests that construct views without a root/run-in-scope wrapper; calling view constructors during SSR teardown; using the API in non-Leptos app code.","solutions":["Wrap the code in a reactive scope/root so an Owner exists (e.g. inside a component or Owner::new().run(...))","Use OwnedView::new_with_owner with an explicitly captured Owner","Spawn async work via leptos facilities that carry the owner instead of raw threads/spawn","In tests, initialize a root owner before constructing views"],"exampleFix":"// before\nlet owned = OwnedView::new(view); // panics outside scope\n// after\nlet owner = Owner::current().expect(\"setup owner first\");\nlet owned = OwnedView::new_with_owner(view, owner);\n","handlingStrategy":"fallback","validationCode":"fn has_owner() -> bool { Owner::current().is_some() }\n// call before: if !has_owner() { /* don't build OwnedView */ }","typeGuard":"fn current_owner() -> Option<Owner> { Owner::current() }","tryCatchPattern":"// panic-based; prefer explicit check over catch:\nmatch Owner::current() {\n    Some(owner) => OwnedView::new_with_owner(view, owner),\n    None => { /* log & skip, or initialize a root scope first */ }\n}","preventionTips":["Construct views only inside components or an Owner scope","Use leptos spawn/task helpers that propagate ownership instead of raw threads","In tests, wrap view construction in a root/scope helper","Capture the Owner early and pass it via new_with_owner for async work"],"tags":["reactive","owner","ssr","panic"],"backgroundTag":"missing-reactive-owner","analyzedSha":"32d20f6c9d517451d77beb68d88c7716823dac41","analyzedAt":"2026-09-01T18:55:42.580Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-09T01:17:15.007Z"}