PHP Класс yii\db\Transaction

It is usually created by calling [[Connection::beginTransaction()]]. The following code is a typical example of using transactions (note that some DBMS may not support transactions): php $transaction = $connection->beginTransaction(); try { $connection->createCommand($sql1)->execute(); $connection->createCommand($sql2)->execute(); .... other SQL executions $transaction->commit(); } catch (\Exception $e) { $transaction->rollBack(); throw $e; }
С версии: 2.0
Автор: Qiang Xue ([email protected])
Наследование: extends yii\base\Object
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Открытые свойства

Свойство Тип Описание
$db the database connection that this transaction is associated with.

Открытые методы

Метод Описание
begin ( string | null $isolationLevel = null ) Begins a transaction.
commit ( ) Commits a transaction.
getIsActive ( ) : boolean Returns a value indicating whether this transaction is active.
getLevel ( ) : integer
rollBack ( ) Rolls back a transaction.
setIsolationLevel ( string $level ) Sets the transaction isolation level for this transaction.

Описание методов

begin() публичный Метод

Begins a transaction.
public begin ( string | null $isolationLevel = null )
$isolationLevel string | null The [isolation level][] to use for this transaction. This can be one of [[READ_UNCOMMITTED]], [[READ_COMMITTED]], [[REPEATABLE_READ]] and [[SERIALIZABLE]] but also a string containing DBMS specific syntax to be used after `SET TRANSACTION ISOLATION LEVEL`. If not specified (`null`) the isolation level will not be set explicitly and the DBMS default will be used. > Note: This setting does not work for PostgreSQL, where setting the isolation level before the transaction has no effect. You have to call [[setIsolationLevel()]] in this case after the transaction has started. > Note: Some DBMS allow setting of the isolation level only for the whole connection so subsequent transactions may get the same isolation level even if you did not specify any. When using this feature you may need to set the isolation level for all transactions explicitly to avoid conflicting settings. At the time of this writing affected DBMS are MSSQL and SQLite. [isolation level]: http://en.wikipedia.org/wiki/Isolation_%28database_systems%29#Isolation_levels

commit() публичный Метод

Commits a transaction.
public commit ( )

getIsActive() публичный Метод

Returns a value indicating whether this transaction is active.
public getIsActive ( ) : boolean
Результат boolean whether this transaction is active. Only an active transaction can [[commit()]] or [[rollBack()]].

getLevel() публичный Метод

С версии: 2.0.8
public getLevel ( ) : integer
Результат integer The current nesting level of the transaction.

rollBack() публичный Метод

Rolls back a transaction.
public rollBack ( )

setIsolationLevel() публичный Метод

This method can be used to set the isolation level while the transaction is already active. However this is not supported by all DBMS so you might rather specify the isolation level directly when calling Transaction::begin.
См. также: http://en.wikipedia.org/wiki/Isolation_%28database_systems%29#Isolation_levels
public setIsolationLevel ( string $level )
$level string The transaction isolation level to use for this transaction. This can be one of [[READ_UNCOMMITTED]], [[READ_COMMITTED]], [[REPEATABLE_READ]] and [[SERIALIZABLE]] but also a string containing DBMS specific syntax to be used after `SET TRANSACTION ISOLATION LEVEL`.

Описание свойств

$db публичное свойство

the database connection that this transaction is associated with.
public $db