SeaQL/sea-orm · error

There is no open transaction to commit

Error message

There is no open transaction to commit

What it means

In the mock database, commit() finalizes the currently open transaction. It panics when no transaction is open (self.transaction is None), meaning commit() was called without a matching begin(). This catches unbalanced begin/commit pairs in code under test.

Source

Thrown at sea-orm-sync/src/database/mock.rs:196

    #[instrument(level = "trace")]
    fn begin(&mut self) {
        match self.transaction.as_mut() {
            Some(transaction) => transaction.begin_nested(self.db_backend),
            None => self.transaction = Some(OpenTransaction::init()),
        }
    }

    #[instrument(level = "trace")]
    fn commit(&mut self) {
        match self.transaction.as_mut() {
            Some(transaction) => {
                if transaction.commit(self.db_backend) {
                    if let Some(transaction) = self.transaction.take() {
                        self.transaction_log.push(transaction.into_transaction());
                    }
                }
            }
            None => panic!("There is no open transaction to commit"),
        }
    }

    #[instrument(level = "trace")]
    fn rollback(&mut self) {
        match self.transaction.as_mut() {
            Some(transaction) => {
                if transaction.rollback(self.db_backend) {
                    if let Some(transaction) = self.transaction.take() {
                        self.transaction_log.push(transaction.into_transaction());
                    }
                }
            }
            None => panic!("There is no open transaction to rollback"),
        }
    }

    fn drain_transaction_log(&mut self) -> Vec<Transaction> {

View on GitHub (pinned to e29bcd1b41)

Solutions

1. Call begin() on the mock connection before commit()
2. Ensure each transaction has exactly one commit or rollback in all code paths (including error paths)
3. Check whether an earlier rollback already ended the transaction before committing

Example fix

// before
conn.execute(stmt).unwrap();
conn.commit(); // panics: no open transaction
// after
conn.begin();
conn.execute(stmt).unwrap();
conn.commit(); // ok

// ensure a transaction is open: call begin() before commit(); in tests assert balanced lifecycle
conn.begin();
// ... statements ...
conn.commit();

std::panic::catch_unwind(std::panic::AssertUnwindSafe(|| conn.commit())).err()
    .map(|_| eprintln!("commit called without an open transaction"));

When it happens

Trigger: Calling MockDatabaseConnection's commit when no begin() was issued; calling commit() twice; a rollback already closed the transaction before commit() ran.

Common situations: Application code calling commit without an explicit transaction on the mock (mock requires explicit begin); test asserting on transaction log after a failed begin; double-commit in error-retry paths.

Understand the failure class

Background: "Invalid state transition" errors: "status must be X, actually Y", "already rejected/charging/uninstalled", "cannot ... while running" — what they mean when a library rejects your call — this error's family across 31 libraries.

Related errors

• There is no open transaction to rollback
• There is no open transaction to commit
• There is no open transaction to rollback
• Failed to acquire mocker
• Not mock connection

AI-assisted analysis of SeaQL/sea-orm@e29bcd1b41 (2026-09-10). Data as JSON: /api/errors/95759aebec229e0b. Report an issue: GitHub.