CExistValidator
| 包 | system.validators |
|---|---|
| 继承 | class CExistValidator » CValidator » CComponent |
| 可用自 | 1.0.4 |
| 版本 | $Id$ |
CExistValidator validates that the attribute value exists in a table.
This validator is often used to verify that a foreign key contains a value that can be found in the foreign table.
CExistValidator can only be used for active record objects.
This validator is often used to verify that a foreign key contains a value that can be found in the foreign table.
CExistValidator can only be used for active record objects.
公共属性
| 属性 | 类型 | 描述 | 被定义在 |
|---|---|---|---|
| allowEmpty | boolean | whether the attribute value can be null or empty. | CExistValidator |
| attributeName | string | the ActiveRecord class attribute name that should be used to look for the attribute value being validated. | CExistValidator |
| attributes | array | list of attributes to be validated. | CValidator |
| builtInValidators | array | list of built-in validators (name=>class) | CValidator |
| className | string | the ActiveRecord class name that should be used to look for the attribute value being validated. | CExistValidator |
| criteria | array | additional query criteria. | CExistValidator |
| message | string | the user-defined error message. | CValidator |
| on | array | list of scenarios that the validator should be applied. | CValidator |
公共方法
| 方法 | 描述 | 被定义在 |
|---|---|---|
| __call() | Calls the named method which is not a class method. | CComponent |
| __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 |
| __unset() | Sets a component property to be null. | CComponent |
| applyTo() | Returns a value indicating whether the validator applies to the specified scenario. | CValidator |
| 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 |
| createValidator() | Creates a validator object. | CValidator |
| 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 |
| validate() | Validates the specified object. | CValidator |
受保护的方法
| 方法 | 描述 | 被定义在 |
|---|---|---|
| addError() | Adds an error about the specified attribute to the active record. | CValidator |
| isEmpty() | Checks if the given value is empty. | CValidator |
| validateAttribute() | Validates the attribute of the object. | CExistValidator |
属性详情
allowEmpty
属性
public boolean $allowEmpty;
whether the attribute value can be null or empty. Defaults to true, meaning that if the attribute is empty, it is considered valid.
attributeName
属性
public string $attributeName;
the ActiveRecord class attribute name that should be used to look for the attribute value being validated. Defaults to null, meaning using the name of the attribute being validated.
参见
className
属性
public string $className;
the ActiveRecord class name that should be used to look for the attribute value being validated. Defaults to null, meaning using the ActiveRecord class of the attribute being validated. You may use path alias to reference a class name here.
criteria
属性
（自版本 v1.0.8 可用）
public array $criteria;
additional query criteria. This will be combined with the condition that checks if the attribute value exists in the corresponding table column. This array will be used to instantiate a CDbCriteria object.
方法详情
validateAttribute()
方法
|
protected void validateAttribute(CModel $object, string $attribute)
| ||
| $object | CModel | the object being validated |
| $attribute | string | the attribute being validated |
Validates the attribute of the object. If there is any error, the error message is added to the object.