MongoDB\Driver\Manager::startSession
(mongodb >=1.4.0)
MongoDB\Driver\Manager::startSession — Start a new client session for use with this client
说明
$options
] ) :
MongoDB\Driver\Session
Creates a MongoDB\Driver\Session for the given options. The session may then be specified when executing commands, queries, and write operations.
Note: A MongoDB\Driver\Session can only be used with the MongoDB\Driver\Manager from which it was created.
参数
-
options
-
options Option Type Description Default causalConsistency boolean Configure causal consistency in a session. If
TRUE
, each operation in the session will be causally ordered after the previous read or write operation. Set toFALSE
to disable causal consistency.See » Casual Consistency in the MongoDB manual for more information.
TRUE
defaultTransactionOptions array Default options to apply to newly created transactions. These options are used unless they are overridden when a transaction is started with different value for each option.
options Option Type Description readConcern MongoDB\Driver\ReadConcern A read concern to apply to the operation.
This option is available in MongoDB 3.2+ and will result in an exception at execution time if specified for an older server version.
readPreference MongoDB\Driver\ReadPreference A read preference to use for selecting a server for the operation.
writeConcern MongoDB\Driver\WriteConcern A write concern to apply to the operation.
This option is available in MongoDB 4.0+.
[]
返回值
Returns a MongoDB\Driver\Session.
错误/异常
- Throws MongoDB\Driver\Exception\InvalidArgumentException on argument parsing errors.
- Throws MongoDB\Driver\Exception\RuntimeException if the session could not be created (e.g. libmongoc does not support crypto).
更新日志
版本 | 说明 |
---|---|
1.5.0 | The "defaultTransactionOptions" option was added. |
参见
- MongoDB\Driver\Session
- » Casual Consistency in the MongoDB manual