MongoDB\Driver\TopologyDescription::hasReadableServer

(mongodb >=1.13.0)

MongoDB\Driver\TopologyDescription::hasReadableServer — Returns whether the topology has a readable server

说明

final public MongoDB\Driver\TopologyDescription::hasReadableServer(?MongoDB\Driver\ReadPreference $readPreference = null): bool

Returns whether the topology has a readable server or, if readPreference is specified, a server matching the specified read preference.

参数

此函数没有参数。

返回值

Returns whether the topology has a readable server or, if readPreference is specified, a server matching the specified read preference.

错误／异常