{"record":{"id":"398779d34a7783e3","repo":"nautechsystems/nautilus_trader","slug":"no-account-events-provided-to-create-accountany","errorCode":null,"errorMessage":"No account events provided to create `AccountAny`","messagePattern":"No account events provided to create `AccountAny`","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"crates/model/src/accounts/any.rs","lineNumber":122,"sourceCode":"        Account::balances(self)\n    }\n\n    #[must_use]\n    pub fn balances_locked(&self) -> IndexMap<Currency, Money> {\n        Account::balances_locked(self)\n    }\n\n    #[must_use]\n    pub fn base_currency(&self) -> Option<Currency> {\n        Account::base_currency(self)\n    }\n\n    /// # Errors\n    ///\n    /// Returns an error if `events` is empty or an account state cannot be created or applied.\n    pub fn from_events(events: &[AccountState]) -> anyhow::Result<Self> {\n        let Some((init_event, remaining_events)) = events.split_first() else {\n            anyhow::bail!(\"No account events provided to create `AccountAny`\");\n        };\n\n        let mut account = Self::from_state_checked(init_event.clone())?;\n\n        for event in remaining_events {\n            account.apply(event.clone())?;\n        }\n\n        Ok(account)\n    }\n\n    /// # Errors\n    ///\n    /// Returns an error if calculating P&Ls fails for the underlying account.\n    pub fn calculate_pnls(\n        &self,\n        instrument: &InstrumentAny,\n        fill: &OrderFilled,","sourceCodeStart":104,"sourceCodeEnd":140,"githubUrl":"https://github.com/nautechsystems/nautilus_trader/blob/18893faf8b356be3320add8de2f861b0b647cf06/crates/model/src/accounts/any.rs#L104-L140","documentation":"`AccountAny::from_events` builds an account from a sequence of `AccountState` events; the first event initializes the account and the rest are applied as updates. If the events slice is empty there is no initializing state, so it bails with this message.","triggerScenarios":"Calling `AccountAny::from_events(&[])` with an empty slice — e.g. an account-state cache lookup returned nothing, or events were filtered out upstream.","commonSituations":"Loading account state from a backing store that has no snapshots yet (fresh environment, wrong account_id filter), or a bug collecting events before conversion.","solutions":["Guard the call: check `!events.is_empty()` before invoking `from_events`.","Verify the source of events (cache/backing store) actually contains account state for the account_id.","Fix any upstream filtering/parsing that drops AccountState events.","Ensure the account was initialized (state generated) before attempting to reconstruct it."],"exampleFix":"// before\nlet account = AccountAny::from_events(&events)?;\n// after\nanyhow::ensure!(!events.is_empty(), \"no account events for account\");\nlet account = AccountAny::from_events(&events)?;","handlingStrategy":"validation","validationCode":"if events.is_empty() {\n    anyhow::bail!(\"no account events available; cannot build AccountAny\");\n}\nlet account = AccountAny::from_events(&events)?;","typeGuard":"fn has_events(events: &[AccountState]) -> bool { !events.is_empty() }","tryCatchPattern":"match AccountAny::from_events(&events) {\n    Err(e) if e.to_string().contains(\"No account events provided\") => {\n        // handle absence of account state: skip or fetch from venue\n    }\n    r => r?,\n}","preventionTips":["Always check the events slice is non-empty before conversion.","Verify the backing store/cache actually persisted initial account state.","Log event collection failures so empty slices are detected at the source."],"tags":["account","empty-input","events","rust"],"backgroundTag":"empty-required-field","analyzedSha":"18893faf8b356be3320add8de2f861b0b647cf06","analyzedAt":"2026-09-08T20:49:34.690Z","contentChangedAt":"2026-09-08T20:49:34.690Z","schemaVersion":2},"datasetVersion":"2026-09-14T00:17:10.932Z"}