Struct diesel::connection::AnsiTransactionManager

pub struct AnsiTransactionManager { /* private fields */ }

An implementation of TransactionManager which can be used for backends which use ANSI standard syntax for savepoints such as SQLite and PostgreSQL.

Implementations

impl AnsiTransactionManager

pub fn begin_transaction_sql<Conn>( conn: &mut Conn, sql: &str ) -> QueryResult<()>where Conn: Connection<TransactionManager = Self>,

Begin a transaction with custom SQL

This is used by connections to implement more complex transaction APIs to set things such as isolation levels. Returns an error if already inside of a transaction.

Trait Implementations

impl Debug for AnsiTransactionManager

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for AnsiTransactionManager

fn default() -> AnsiTransactionManager

Returns the “default value” for a type.

impl<Conn> TransactionManager<Conn> for AnsiTransactionManagerwhere Conn: Connection<TransactionManager = Self>,

fn commit_transaction(conn: &mut Conn) -> QueryResult<()>

If the transaction fails to commit due to a SerializationFailure or a ReadOnlyTransaction a rollback will be attempted. If the rollback succeeds, the original error will be returned, otherwise the error generated by the rollback will be returned. In the second case the connection will be considered broken as it contains a uncommitted unabortable open transaction.

type TransactionStateData = AnsiTransactionManager

Data stored as part of the connection implementation to track the current transaction state of a connection

fn begin_transaction(conn: &mut Conn) -> QueryResult<()>

Begin a new transaction or savepoint

fn rollback_transaction(conn: &mut Conn) -> QueryResult<()>

Rollback the inner-most transaction or savepoint

fn transaction_manager_status_mut( conn: &mut Conn ) -> &mut TransactionManagerStatus

Available on crate feature i-implement-a-third-party-backend-and-opt-into-breaking-changes only.

Fetch the current transaction status as mutable

fn transaction<F, R, E>(conn: &mut Conn, callback: F) -> Result<R, E>where F: FnOnce(&mut Conn) -> Result<R, E>, E: From<Error>,

Executes the given function inside of a database transaction

fn is_broken_transaction_manager(conn: &mut Conn) -> bool

Available on crate feature i-implement-a-third-party-backend-and-opt-into-breaking-changes only.

This methods checks if the connection manager is considered to be broken by connection pool implementations