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CDbExpression

Package system.db.schema
Inheritance class CDbExpression » CComponent
Since 1.0.2
Version $Id: CDbExpression.php 544 2009-01-18 13:27:31Z qiang.xue $
CDbExpression represents a DB expression that does not need escaping. CDbExpression is mainly used in CActiveRecord as attribute values. When inserting or updating a CActiveRecord, attribute values of type CDbExpression will be directly put into the corresponding SQL statement without escaping. A typical usage is that an attribute is set with 'NOW()' expression so that saving the record would fill the corresponding column with the current DB server timestamp.

Public Properties

Hide inherited properties

PropertyTypeDescriptionDefined By
expression string the DB expression CDbExpression

Public Methods

Hide inherited methods

MethodDescriptionDefined By
__call() Calls the named method which is not a class method. CComponent
__construct() Constructor. CDbExpression
__get() Returns a property value, an event handler list or a behavior based on its name. CComponent
__isset() Checks if a property value is null. CComponent
__set() Sets value of a component property. CComponent
__toString() String magic method CDbExpression
__unset() Sets a component property to be null. CComponent
asa() Returns the named behavior object. CComponent
attachBehavior() Attaches a behavior to this component. CComponent
attachBehaviors() Attaches a list of behaviors to the component. CComponent
attachEventHandler() Attaches an event handler to an event. CComponent
canGetProperty() Determines whether a property can be read. CComponent
canSetProperty() Determines whether a property can be set. CComponent
detachBehavior() Detaches a behavior from the component. CComponent
detachBehaviors() Detaches all behaviors from the component. CComponent
detachEventHandler() Detaches an existing event handler. CComponent
disableBehavior() Disables an attached behavior. CComponent
disableBehaviors() Disables all behaviors attached to this component. CComponent
enableBehavior() Enables an attached behavior. CComponent
enableBehaviors() Enables all behaviors attached to this component. CComponent
getEventHandlers() Returns the list of attached event handlers for an event. CComponent
hasEvent() Determines whether an event is defined. CComponent
hasEventHandler() Checks whether the named event has attached handlers. CComponent
hasProperty() Determines whether a property is defined. CComponent
raiseEvent() Raises an event. CComponent

Property Details

expression property
public string $expression;

the DB expression

Method Details

__construct() method
public void __construct(string $expression)
$expression string the DB expression

Constructor.

__toString() method
public string __toString()
{return} string the DB expression

String magic method

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