CCompareValidator
| 包 | system.validators |
|---|---|
| 继承 | class CCompareValidator » CValidator » CComponent |
| 可用自 | 1.0 |
| 源码 | framework/validators/CCompareValidator.php |
CCompareValidator compares the specified attribute value with another value and validates if they are equal.
The value being compared with can be another attribute value (specified via compareAttribute) or a constant (specified via compareValue. When both are specified, the latter takes precedence. If neither is specified, the attribute will be compared with another attribute whose name is by appending "_repeat" to the source attribute name.
The comparison can be either strict or not.
CCompareValidator supports different comparison operators. Previously, it only compares to see if two values are equal or not.
When using the message property to define a custom error message, the message may contain additional placeholders that will be replaced with the actual content. In addition to the "{attribute}" placeholder, recognized by all validators (see CValidator), CCompareValidator allows for the following placeholders to be specified:
The value being compared with can be another attribute value (specified via compareAttribute) or a constant (specified via compareValue. When both are specified, the latter takes precedence. If neither is specified, the attribute will be compared with another attribute whose name is by appending "_repeat" to the source attribute name.
The comparison can be either strict or not.
CCompareValidator supports different comparison operators. Previously, it only compares to see if two values are equal or not.
When using the message property to define a custom error message, the message may contain additional placeholders that will be replaced with the actual content. In addition to the "{attribute}" placeholder, recognized by all validators (see CValidator), CCompareValidator allows for the following placeholders to be specified:
- {compareValue}: replaced with the constant value being compared with (compareValue).
- {compareAttribute}: replaced with the label of the attribute being compared with (compareAttribute).
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. | CCompareValidator |
| attributes | array | list of attributes to be validated. | CValidator |
| builtInValidators | array | list of built-in validators (name=>class) | CValidator |
| compareAttribute | string | the name of the attribute to be compared with | CCompareValidator |
| compareValue | string | the constant value to be compared with | CCompareValidator |
| 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 |
| operator | string | the operator for comparison. | CCompareValidator |
| 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 |
| strict | boolean | whether the comparison is strict (both value and type must be the same. | CCompareValidator |
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 |
| clientValidateAttribute() | Returns the JavaScript needed for performing client-side validation. | CCompareValidator |
| 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 |
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. | CCompareValidator |
属性详情
allowEmpty
属性
public boolean $allowEmpty;
whether the attribute value can be null or empty. Defaults to false. If this is true, it means the attribute is considered valid when it is empty.
compareAttribute
属性
public string $compareAttribute;
the name of the attribute to be compared with
compareValue
属性
public string $compareValue;
the constant value to be compared with
operator
属性
public string $operator;
the operator for comparison. Defaults to '='. The followings are valid operators:
- '=' or '==': validates to see if the two values are equal. If strict is true, the comparison will be done in strict mode (i.e. checking value type as well).
- '!=': validates to see if the two values are NOT equal. If strict is true, the comparison will be done in strict mode (i.e. checking value type as well).
- '>': validates to see if the value being validated is greater than the value being compared with.
- '>=': validates to see if the value being validated is greater than or equal to the value being compared with.
- '<': validates to see if the value being validated is less than the value being compared with.
- '<=': validates to see if the value being validated is less than or equal to the value being compared with.
strict
属性
public boolean $strict;
whether the comparison is strict (both value and type must be the same.) Defaults to false.
方法详情
clientValidateAttribute()
方法
（自版本 v1.1.7 可用）
|
public string clientValidateAttribute(CModel $object, string $attribute)
| ||
| $object | CModel | the data object being validated |
| $attribute | string | the name of the attribute to be validated. |
| {return} | string | the client-side validation script. |
源码： framework/validators/CCompareValidator.php#139 (显示)
public function clientValidateAttribute($object,$attribute)
{
if($this->compareValue !== null)
{
$compareTo=$this->compareValue;
$compareValue=CJSON::encode($this->compareValue);
}
else
{
$compareAttribute=$this->compareAttribute === null ? $attribute . '_repeat' : $this->compareAttribute;
$compareValue="jQuery('#" . (CHtml::activeId($object, $compareAttribute)) . "').val()";
$compareTo=$object->getAttributeLabel($compareAttribute);
}
$message=$this->message;
switch($this->operator)
{
case '=':
case '==':
if($message===null)
$message=Yii::t('yii','{attribute} must be repeated exactly.');
$condition='value!='.$compareValue;
break;
case '!=':
if($message===null)
$message=Yii::t('yii','{attribute} must not be equal to "{compareValue}".');
$condition='value=='.$compareValue;
break;
case '>':
if($message===null)
$message=Yii::t('yii','{attribute} must be greater than "{compareValue}".');
$condition='parseFloat(value)<=parseFloat('.$compareValue.')';
break;
case '>=':
if($message===null)
$message=Yii::t('yii','{attribute} must be greater than or equal to "{compareValue}".');
$condition='parseFloat(value)<parseFloat('.$compareValue.')';
break;
case '<':
if($message===null)
$message=Yii::t('yii','{attribute} must be less than "{compareValue}".');
$condition='parseFloat(value)>=parseFloat('.$compareValue.')';
break;
case '<=':
if($message===null)
$message=Yii::t('yii','{attribute} must be less than or equal to "{compareValue}".');
$condition='parseFloat(value)>parseFloat('.$compareValue.')';
break;
default:
throw new CException(Yii::t('yii','Invalid operator "{operator}".',array('{operator}'=>$this->operator)));
}
$message=strtr($message,array(
'{attribute}'=>$object->getAttributeLabel($attribute),
'{compareAttribute}'=>$compareTo,
));
return "
if(".($this->allowEmpty ? "jQuery.trim(value)!='' && " : '').$condition.") {
messages.push(".CJSON::encode($message).".replace('{compareValue}', ".$compareValue."));
}
";
}
Returns the JavaScript needed for performing client-side validation.
validateAttribute()
方法
|
protected void validateAttribute(CModel $object, string $attribute)
| ||
| $object | CModel | the object being validated |
| $attribute | string | the attribute being validated |
源码： framework/validators/CCompareValidator.php#82 (显示)
protected function validateAttribute($object,$attribute)
{
$value=$object->$attribute;
if($this->allowEmpty && $this->isEmpty($value))
return;
if($this->compareValue!==null)
$compareTo=$compareValue=$this->compareValue;
else
{
$compareAttribute=$this->compareAttribute===null ? $attribute.'_repeat' : $this->compareAttribute;
$compareValue=$object->$compareAttribute;
$compareTo=$object->getAttributeLabel($compareAttribute);
}
switch($this->operator)
{
case '=':
case '==':
if(($this->strict && $value!==$compareValue) || (!$this->strict && $value!=$compareValue))
$message=$this->message!==null?$this->message:Yii::t('yii','{attribute} must be repeated exactly.');
break;
case '!=':
if(($this->strict && $value===$compareValue) || (!$this->strict && $value==$compareValue))
$message=$this->message!==null?$this->message:Yii::t('yii','{attribute} must not be equal to "{compareValue}".');
break;
case '>':
if($value<=$compareValue)
$message=$this->message!==null?$this->message:Yii::t('yii','{attribute} must be greater than "{compareValue}".');
break;
case '>=':
if($value<$compareValue)
$message=$this->message!==null?$this->message:Yii::t('yii','{attribute} must be greater than or equal to "{compareValue}".');
break;
case '<':
if($value>=$compareValue)
$message=$this->message!==null?$this->message:Yii::t('yii','{attribute} must be less than "{compareValue}".');
break;
case '<=':
if($value>$compareValue)
$message=$this->message!==null?$this->message:Yii::t('yii','{attribute} must be less than or equal to "{compareValue}".');
break;
default:
throw new CException(Yii::t('yii','Invalid operator "{operator}".',array('{operator}'=>$this->operator)));
}
if(!empty($message))
$this->addError($object,$attribute,$message,array('{compareAttribute}'=>$compareTo,'{compareValue}'=>$compareValue));
}
Validates the attribute of the object. If there is any error, the error message is added to the object.