{"record":{"id":"ed73d3a1634e80e8","repo":"SeaQL/sea-orm","slug":"there-is-no-open-transaction-to-rollback","errorCode":null,"errorMessage":"There is no open transaction to rollback","messagePattern":"There is no open transaction to rollback","errorType":"panic","errorClass":null,"httpStatus":null,"severity":"error","filePath":"sea-orm-sync/src/database/mock.rs","lineNumber":210,"sourceCode":"                        self.transaction_log.push(transaction.into_transaction());\n                    }\n                }\n            }\n            None => panic!(\"There is no open transaction to commit\"),\n        }\n    }\n\n    #[instrument(level = \"trace\")]\n    fn rollback(&mut self) {\n        match self.transaction.as_mut() {\n            Some(transaction) => {\n                if transaction.rollback(self.db_backend) {\n                    if let Some(transaction) = self.transaction.take() {\n                        self.transaction_log.push(transaction.into_transaction());\n                    }\n                }\n            }\n            None => panic!(\"There is no open transaction to rollback\"),\n        }\n    }\n\n    fn drain_transaction_log(&mut self) -> Vec<Transaction> {\n        std::mem::take(&mut self.transaction_log)\n    }\n\n    fn get_database_backend(&self) -> DbBackend {\n        self.db_backend\n    }\n\n    fn ping(&self) -> Result<(), DbErr> {\n        Ok(())\n    }\n}\n\nimpl MockRow {\n    /// Get a value from the [MockRow]","sourceCodeStart":192,"sourceCodeEnd":228,"githubUrl":"https://github.com/SeaQL/sea-orm/blob/e29bcd1b417c41a553b386fe94511d7c64a1c8ec/sea-orm-sync/src/database/mock.rs#L192-L228","documentation":"In the mock database, rollback() aborts the currently open transaction. It panics when no transaction is open (self.transaction is None), i.e. rollback() was called without a matching begin() or after the transaction already ended. This enforces balanced transaction bookkeeping in tests.","triggerScenarios":"Calling rollback() on the mock connection with no begin() issued; calling rollback() twice; commit() already closed the transaction before rollback() ran.","commonSituations":"Error-handling code that unconditionally rolls back even when no transaction started; double-rollback in nested error paths; tests that simulate failures after the transaction was committed.","solutions":["Only call rollback() when a transaction is known to be open (begin() succeeded and not yet ended)","Use RAII-style or guard-based transaction handling so commit/rollback happen exactly once","In tests, mirror the transaction lifecycle your real code executes"],"exampleFix":"// before\nconn.rollback(); // panics: nothing to roll back\n// after\nconn.begin();\nconn.execute(stmt).unwrap_err();\nconn.rollback(); // ok","handlingStrategy":"validation","validationCode":"// only roll back when a transaction was started and not yet ended:\nconn.begin();\n// ... statements ...\nconn.rollback();","typeGuard":null,"tryCatchPattern":"std::panic::catch_unwind(std::panic::AssertUnwindSafe(|| conn.rollback())).err()\n    .map(|_| eprintln!(\"rollback called without an open transaction\"));","preventionTips":["Track a boolean `in_txn` in wrappers before issuing rollback","Avoid unconditional rollback in generic error handlers; roll back only where begin() succeeded","Make commit and rollback mutually exclusive per transaction in code paths"],"tags":["panic","transaction","mock","testing"],"backgroundTag":"invalid-state-transition","analyzedSha":"e29bcd1b417c41a553b386fe94511d7c64a1c8ec","analyzedAt":"2026-09-10T11:31:52.468Z","contentChangedAt":"2026-09-10T11:31:52.468Z","schemaVersion":2},"datasetVersion":"2026-09-14T05:17:10.506Z"}