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CValidator

Package	system.validators
Inheritance	abstract class CValidator » CComponent
Subclasses	CBooleanValidator, CCaptchaValidator, CCompareValidator, CDateValidator, CDefaultValueValidator, CEmailValidator, CExistValidator, CFileValidator, CFilterValidator, CInlineValidator, CNumberValidator, CRangeValidator, CRegularExpressionValidator, CRequiredValidator, CSafeValidator, CStringValidator, CTypeValidator, CUniqueValidator, CUnsafeValidator, CUrlValidator
Since	1.0
Source Code	framework/validators/CValidator.php

CValidator is the base class for all validators.

Child classes must implement the validateAttribute method.

When using createValidator to create a validator, the following aliases are recognized as the corresponding built-in validator classes:

Public Properties

Hide inherited properties

Property	Type	Description	Defined By
attributes	array	list of attributes to be validated.	CValidator
builtInValidators	array	list of built-in validators (name=>class)	CValidator
enableClientValidation	boolean	whether to perform client-side validation.	CValidator
except	array	list of scenarios that the validator should not be applied to.	CValidator
message	string	the user-defined error message.	CValidator
on	array	list of scenarios that the validator should be applied.	CValidator
safe	boolean	whether attributes listed with this validator should be considered safe for massive assignment.	CValidator
skipOnError	boolean	whether this validation rule should be skipped when there is already a validation error for the current attribute.	CValidator

Public Methods

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Method	Description	Defined By
__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
clientValidateAttribute()	Returns the JavaScript needed for performing client-side validation.	CValidator
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
evaluateExpression()	Evaluates a PHP expression or callback under the context of 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

Protected Methods

Hide inherited methods

Method	Description	Defined By
addError()	Adds an error about the specified attribute to the active record.	CValidator
isEmpty()	Checks if the given value is empty.	CValidator
validateAttribute()	Validates a single attribute.	CValidator

Property Details

attributes property

public array $attributes;

list of attributes to be validated.

builtInValidators property

public static array $builtInValidators;

list of built-in validators (name=>class)

enableClientValidation property (available since v1.1.7)

public boolean $enableClientValidation;

whether to perform client-side validation. Defaults to true. Please refer to CActiveForm::enableClientValidation for more details about client-side validation.

except property (available since v1.1.11)

public array $except;

list of scenarios that the validator should not be applied to. Each array value refers to a scenario name with the same name as its array key.

message property

public string $message;

the user-defined error message. Different validators may define various placeholders in the message that are to be replaced with actual values. All validators recognize "{attribute}" placeholder, which will be replaced with the label of the attribute.

on property

public array $on;

list of scenarios that the validator should be applied. Each array value refers to a scenario name with the same name as its array key.

safe property (available since v1.1.4)

public boolean $safe;

whether attributes listed with this validator should be considered safe for massive assignment. Defaults to true.

skipOnError property (available since v1.1.1)

public boolean $skipOnError;

whether this validation rule should be skipped when there is already a validation error for the current attribute. Defaults to false.

Method Details

addError() method

protected void addError(CModel $object, string $attribute, string $message, array $params=array ( ))
$object	CModel	the data object being validated
$attribute	string	the attribute being validated
$message	string	the error message
$params	array	values for the placeholders in the error message

Source Code: framework/validators/CValidator.php#248 (show)


protected function addError($object,$attribute,$message,$params=array())
{
    $params['{attribute}']=$object->getAttributeLabel($attribute);
    $object->addError($attribute,strtr($message,$params));
}

Adds an error about the specified attribute to the active record. This is a helper method that performs message selection and internationalization.

applyTo() method

public boolean applyTo(string $scenario)
$scenario	string	scenario name
{return}	boolean	whether the validator applies to the specified scenario.

Source Code: framework/validators/CValidator.php#233 (show)


public function applyTo($scenario)
{
    if(isset($this->except[$scenario]))
        return false;
    return empty($this->on) || isset($this->on[$scenario]);
}

Returns a value indicating whether the validator applies to the specified scenario. A validator applies to a scenario as long as any of the following conditions is met:

the validator's "on" property is empty
the validator's "on" property contains the specified scenario

clientValidateAttribute() method (available since v1.1.7)

public string clientValidateAttribute(CModel $object, string $attribute)
$object	CModel	the data object being validated
$attribute	string	the name of the attribute to be validated.
{return}	string	the client-side validation script. Null if the validator does not support client-side validation.

Source Code: framework/validators/CValidator.php#219 (show)


public function clientValidateAttribute($object,$attribute)
{
}

Returns the JavaScript needed for performing client-side validation. Do not override this method if the validator does not support client-side validation. Two predefined JavaScript variables can be used:

value: the value to be validated
messages: an array used to hold the validation error messages for the value

public static CValidator createValidator(string $name, CModel $object, mixed $attributes, array $params=array ( ))
$name	string	the name or class of the validator
$object	CModel	the data object being validated that may contain the inline validation method
$attributes	mixed	list of attributes to be validated. This can be either an array of the attribute names or a string of comma-separated attribute names.
$params	array	initial values to be applied to the validator properties
{return}	CValidator	the validator

Source Code: framework/validators/CValidator.php#129 (show)


public static function createValidator($name,$object,$attributes,$params=array())
{
    if(is_string($attributes))
        $attributes=preg_split('/\s*,\s*/',trim($attributes, " \t\n\r\0\x0B,"),-1,PREG_SPLIT_NO_EMPTY);

    if(isset($params['on']))
    {
        if(is_array($params['on']))
            $on=$params['on'];
        else
            $on=preg_split('/[\s,]+/',$params['on'],-1,PREG_SPLIT_NO_EMPTY);
    }
    else
        $on=array();

    if(isset($params['except']))
    {
        if(is_array($params['except']))
            $except=$params['except'];
        else
            $except=preg_split('/[\s,]+/',$params['except'],-1,PREG_SPLIT_NO_EMPTY);
    }
    else
        $except=array();

    if(method_exists($object,$name))
    {
        $validator=new CInlineValidator;
        $validator->attributes=$attributes;
        $validator->method=$name;
        if(isset($params['clientValidate']))
        {
            $validator->clientValidate=$params['clientValidate'];
            unset($params['clientValidate']);
        }
        $validator->params=$params;
        if(isset($params['skipOnError']))
            $validator->skipOnError=$params['skipOnError'];
    }
    else
    {
        $params['attributes']=$attributes;
        if(isset(self::$builtInValidators[$name]))
            $className=Yii::import(self::$builtInValidators[$name],true);
        else
            $className=Yii::import($name,true);
        $validator=new $className;
        foreach($params as $name=>$value)
            $validator->$name=$value;
    }

    $validator->on=empty($on) ? array() : array_combine($on,$on);
    $validator->except=empty($except) ? array() : array_combine($except,$except);

    return $validator;
}

Creates a validator object.

isEmpty() method

protected boolean isEmpty(mixed $value, boolean $trim=false)
$value	mixed	the value to be checked
$trim	boolean	whether to perform trimming before checking if the string is empty. Defaults to false.
{return}	boolean	whether the value is empty

Source Code: framework/validators/CValidator.php#262 (show)


protected function isEmpty($value,$trim=false)
{
    return $value===null || $value===array() || $value==='' || $trim && is_scalar($value) && trim($value)==='';
}

Checks if the given value is empty. A value is considered empty if it is null, an empty array, or the trimmed result is an empty string. Note that this method is different from PHP empty(). It will return false when the value is 0.

validate() method

public void validate(CModel $object, array $attributes=NULL)
$object	CModel	the data object being validated
$attributes	array	the list of attributes to be validated. Defaults to null, meaning every attribute listed in attributes will be validated.

Source Code: framework/validators/CValidator.php#192 (show)


public function validate($object,$attributes=null)
{
    if(is_array($attributes))
        $attributes=array_intersect($this->attributes,$attributes);
    else
        $attributes=$this->attributes;
    foreach($attributes as $attribute)
    {
        if(!$this->skipOnError || !$object->hasErrors($attribute))
            $this->validateAttribute($object,$attribute);
    }
}

Validates the specified object.

validateAttribute() method

abstract protected void validateAttribute(CModel $object, string $attribute)
$object	CModel	the data object being validated
$attribute	string	the name of the attribute to be validated.

Source Code: framework/validators/CValidator.php#117 (show)


abstract protected function validateAttribute($object,$attribute);

Validates a single attribute. This method should be overridden by child classes.