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- Mongo
- 核心类
- MongoCursorInterface
MongoCursorInterface::setReadPreference
(PECL mongo >=1.6.0)
MongoCursorInterface::setReadPreference — Set the read preference for this query
说明
abstract public MongoCursorInterface::setReadPreference ( string$read_preference
[, array $tags
] ) : MongoCursorInterface
参数
-
read_preference -
The read preference mode:
MongoClient::RP_PRIMARY,MongoClient::RP_PRIMARY_PREFERRED,MongoClient::RP_SECONDARY,MongoClient::RP_SECONDARY_PREFERRED, orMongoClient::RP_NEAREST. -
tags -
An array of zero or more tag sets, where each tag set is itself an array of criteria used to match tags on replica set members.
返回值
Returns this cursor.
错误／异常
Emits E_WARNING if either parameter is invalid, or if one or more tag sets are provided with the MongoClient::RP_PRIMARY read preference mode.
参见
- The read preferences documentation.
- MongoCursorInterface::getReadPreference() - Get the read preference for this query
User Contributed Notes
There are no user contributed notes for this page.官方地址：https://www.php.net/manual/en/mongocursorinterface.setreadpreference.php