CDbExpression
包 | system.db.schema |
---|---|
继承 | class CDbExpression » CComponent |
可用自 | 1.0.2 |
版本 | $Id$ |
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.
公共方法
方法 | 描述 | 被定义在 |
---|---|---|
__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 |
属性详情
expression
属性
public string $expression;
the DB expression
方法详情
__construct()
方法
public void __construct(string $expression)
| ||
$expression | string | the DB expression |
Constructor.
__toString()
方法
public string __toString()
| ||
{return} | string | the DB expression |
String magic method