PHP Class yii\caching\DbDependency

If the query result changes, the dependency is considered as changed. The query is specified via the [[sql]] property. For more details and usage information on Cache, see the guide article on caching.

Since: 2.0

Author: Qiang Xue ([email protected])

Inheritance: extends yii\caching\Dependency

Show file Open project: yiisoft/yii2 Class Usage Examples

Public Properties

Property	Type	Description
$db		the application component ID of the DB connection.
$params		the parameters (name => value) to be bound to the SQL statement specified by [[sql]].
$sql		the SQL query whose result is used to determine if the dependency has been changed. Only the first row of the query result will be used.

Protected Methods

Method	Description
generateDependencyData ( Cache $cache ) : mixed	Generates the data needed to determine if dependency has been changed.

Method Details

generateDependencyData() protected method

This method returns the value of the global state.

protected generateDependencyData ( Cache $cache ) : mixed
$cache	Cache	the cache component that is currently evaluating this dependency
return	mixed	the data needed to determine if dependency has been changed.

Property Details

$db public property

the application component ID of the DB connection.

public $db

$params public property

the parameters (name => value) to be bound to the SQL statement specified by [[sql]].

public $params

$sql public property

the SQL query whose result is used to determine if the dependency has been changed. Only the first row of the query result will be used.

public $sql