MongoCursor::setFlag
(PECL mongo >=1.2.11)
MongoCursor::setFlag — Sets arbitrary flags in case there is no method available the specific flag
说明
The MongoCursor class has several methods for setting flags on the query object. This method is available in case the MongoDB wire protocol has acquired a new flag, and the driver has not been updated with a method for this new flag. In all other cases, the method should be used. See the "See also" section for available methods.
参数
-
flag -
Which flag to set. You can not set flag 6 (EXHAUST) as the driver does not know how to handle them. You will get a warning if you try to use this flag. For available flags, please refer to the wire protocol » documentation.
-
set -
Whether the flag should be set (
TRUE) or unset (FALSE).
返回值
Returns this cursor.
错误／异常
Shows a warning when an unsupport flag is attempted to be set.
更新日志
| 版本 | 说明 |
|---|---|
| 1.4.0 | Support for flag 3 (OPLOG_REPLAY) is added. Versions before 1.4.0 would throw a warning saying that the flag is unsupported. |
范例
Example #1 MongoCursor::setFlag() example
<?php
$m = new MongoClient( 'mongodb://localhost:13000', array( 'replSet' => 'seta' ) );
$c = $m->local->selectCollection( 'oplog.rs' );
$cursor = $c->find( array( 'ns' => 'demo.article', 'op' => 'i' ) );
$cursor->setFlag( 1, true ); // sets the tailable flag
$cursor->setFlag( 5, true ); // sets the await data flag
?>
参见
- MongoCursor::tailable() - Sets whether this cursor will be left open after fetching the last results
- MongoCursor::immortal() - Sets whether this cursor will timeout
- MongoCursor::awaitData() - Sets whether this cursor will wait for a while for a tailable cursor to return more data
- MongoCursor::partial() - If this query should fetch partial results from mongos if a shard is down
- MongoDB core docs on» wire protocol query flags
