Class yii\validators\CompareValidator

Inheritanceyii\validators\CompareValidator » yii\validators\Validator » yii\base\Component » yii\base\Object
Implementsyii\base\Configurable
Available since version2.0
Source Code https://github.com/yiisoft/yii2/blob/master/framework/validators/CompareValidator.php

CompareValidator compares the specified attribute value with another value.

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.

CompareValidator supports different comparison operators, specified via the $operator property.

The default comparison function is based on string values, which means the values are compared byte by byte. When comparing numbers, make sure to set the $type to TYPE_NUMBER to enable numeric comparison.

Public Properties

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PropertyTypeDescriptionDefined By
$attributes array|string Attributes to be validated by this validator. yii\validators\Validator
$behaviors yii\base\Behavior[] List of behaviors attached to this component yii\base\Component
$builtInValidators array List of built-in validators (name => class or configuration) yii\validators\Validator
$compareAttribute string The name of the attribute to be compared with. yii\validators\CompareValidator
$compareValue mixed The constant value to be compared with. yii\validators\CompareValidator
$enableClientValidation boolean Whether to enable client-side validation for this validator. yii\validators\Validator
$except array|string Scenarios that the validator should not be applied to. yii\validators\Validator
$isEmpty callable A PHP callable that replaces the default implementation of isEmpty(). yii\validators\Validator
$message string The user-defined error message. yii\validators\CompareValidator
$on array|string Scenarios that the validator can be applied to. yii\validators\Validator
$operator string The operator for comparison. yii\validators\CompareValidator
$skipOnEmpty boolean Whether this validation rule should be skipped if the attribute value is null or an empty string. yii\validators\Validator
$skipOnError boolean Whether this validation rule should be skipped if the attribute being validated already has some validation error according to some previous rules. yii\validators\Validator
$type string The type of the values being compared. yii\validators\CompareValidator
$when callable A PHP callable whose return value determines whether this validator should be applied. yii\validators\Validator
$whenClient string A JavaScript function name whose return value determines whether this validator should be applied on the client-side. yii\validators\Validator

Public Methods

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MethodDescriptionDefined By
__call() Calls the named method which is not a class method. yii\base\Component
__clone() This method is called after the object is created by cloning an existing one. yii\base\Component
__construct() Constructor. yii\base\Object
__get() Returns the value of a component property. yii\base\Component
__isset() Checks if a property is set, i.e. defined and not null. yii\base\Component
__set() Sets the value of a component property. yii\base\Component
__unset() Sets a component property to be null. yii\base\Component
addError() Adds an error about the specified attribute to the model object. yii\validators\Validator
attachBehavior() Attaches a behavior to this component. yii\base\Component
attachBehaviors() Attaches a list of behaviors to the component. yii\base\Component
behaviors() Returns a list of behaviors that this component should behave as. yii\base\Component
canGetProperty() Returns a value indicating whether a property can be read. yii\base\Component
canSetProperty() Returns a value indicating whether a property can be set. yii\base\Component
className() Returns the fully qualified name of this class. yii\base\Object
clientValidateAttribute() Returns the JavaScript needed for performing client-side validation. yii\validators\CompareValidator
createValidator() Creates a validator object. yii\validators\Validator
detachBehavior() Detaches a behavior from the component. yii\base\Component
detachBehaviors() Detaches all behaviors from the component. yii\base\Component
ensureBehaviors() Makes sure that the behaviors declared in behaviors() are attached to this component. yii\base\Component
getBehavior() Returns the named behavior object. yii\base\Component
getBehaviors() Returns all behaviors attached to this component. yii\base\Component
getClientOptions() Returns the client-side validation options. yii\validators\CompareValidator
hasEventHandlers() Returns a value indicating whether there is any handler attached to the named event. yii\base\Component
hasMethod() Returns a value indicating whether a method is defined. yii\base\Component
hasProperty() Returns a value indicating whether a property is defined for this component. yii\base\Component
init() Initializes the object. yii\validators\CompareValidator
isActive() Returns a value indicating whether the validator is active for the given scenario and attribute. yii\validators\Validator
isEmpty() Checks if the given value is empty. yii\validators\Validator
off() Detaches an existing event handler from this component. yii\base\Component
on() Attaches an event handler to an event. yii\base\Component
trigger() Triggers an event. yii\base\Component
validate() Validates a given value. yii\validators\Validator
validateAttribute() Validates a single attribute. yii\validators\CompareValidator
validateAttributes() Validates the specified object. yii\validators\Validator

Protected Methods

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MethodDescriptionDefined By
compareValues() Compares two values with the specified operator. yii\validators\CompareValidator
validateValue() Validates a value. yii\validators\CompareValidator

Constants

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ConstantValueDescriptionDefined By
TYPE_NUMBER 'number' Constant for specifying the comparison $type by numeric values. yii\validators\CompareValidator
TYPE_STRING 'string' Constant for specifying the comparison $type by numeric values. yii\validators\CompareValidator

Property Details

$compareAttribute public property

The name of the attribute to be compared with. When both this property and $compareValue are set, the latter takes precedence. If neither is set, it assumes the comparison is against another attribute whose name is formed by appending '_repeat' to the attribute being validated. For example, if 'password' is being validated, then the attribute to be compared would be 'password_repeat'.

See also $compareValue.

public string $compareAttribute null
$compareValue public property

The constant value to be compared with. When both this property and $compareAttribute are set, this property takes precedence.

See also $compareAttribute.

public mixed $compareValue null
$message public property

The user-defined error message. It may contain the following placeholders which will be replaced accordingly by the validator:

  • {attribute}: the label of the attribute being validated
  • {value}: the value of the attribute being validated
  • {compareValue}: the value or the attribute label to be compared with
  • {compareAttribute}: the label of the attribute to be compared with
  • {compareValueOrAttribute}: the value or the attribute label to be compared with
public string $message null
$operator public property

The operator for comparison. The following operators are supported:

  • ==: check if two values are equal. The comparison is done is non-strict mode.
  • ===: check if two values are equal. The comparison is done is strict mode.
  • !=: check if two values are NOT equal. The comparison is done is non-strict mode.
  • !==: check if two values are NOT equal. The comparison is done is strict mode.
  • >: check if value being validated is greater than the value being compared with.
  • >=: check if value being validated is greater than or equal to the value being compared with.
  • <: check if value being validated is less than the value being compared with.
  • <=: check if value being validated is less than or equal to the value being compared with.

When you want to compare numbers, make sure to also set $type to number.

public string $operator '=='
$type public property

The type of the values being compared. The follow types are supported:

  • string: the values are being compared as strings. No conversion will be done before comparison.
  • number: the values are being compared as numbers. String values will be converted into numbers before comparison.
public string $type self::TYPE_STRING

Method Details

clientValidateAttribute() public method

Returns the JavaScript needed for performing client-side validation.

Calls getClientOptions() to generate options array for client-side validation.

You may override this method to return the JavaScript validation code if the validator can support client-side validation.

The following JavaScript variables are predefined and can be used in the validation code:

  • attribute: an object describing the the attribute being validated.
  • value: the value being validated.
  • messages: an array used to hold the validation error messages for the attribute.
  • deferred: an array used to hold deferred objects for asynchronous validation
  • $form: a jQuery object containing the form element

The attribute object contains the following properties:

  • id: a unique ID identifying the attribute (e.g. "loginform-username") in the form
  • name: attribute name or expression (e.g. "[0]content" for tabular input)
  • container: the jQuery selector of the container of the input field
  • input: the jQuery selector of the input field under the context of the form
  • error: the jQuery selector of the error tag under the context of the container
  • status: status of the input field, 0: empty, not entered before, 1: validated, 2: pending validation, 3: validating
public string clientValidateAttribute ( $model, $attribute, $view )
$model yii\base\Model

The data model being validated

$attribute string

The name of the attribute to be validated.

$view yii\web\View

The view object that is going to be used to render views or view files containing a model form with this validator applied.

return string

The client-side validation script. Null if the validator does not support client-side validation.

compareValues() protected method

Compares two values with the specified operator.

protected boolean compareValues ( $operator, $type, $value, $compareValue )
$operator string

The comparison operator

$type string

The type of the values being compared

$value mixed

The value being compared

$compareValue mixed

Another value being compared

return boolean

Whether the comparison using the specified operator is true.

getClientOptions() public method

Returns the client-side validation options.

This method is usually called from clientValidateAttribute(). You may override this method to modify options that will be passed to the client-side validation.

public array getClientOptions ( $model, $attribute )
$model yii\base\Model

The model being validated

$attribute string

The attribute name being validated

return array

The client-side validation options

init() public method

Initializes the object.

This method is invoked at the end of the constructor after the object is initialized with the given configuration.

public void init ( )
validateAttribute() public method

Validates a single attribute.

Child classes must implement this method to provide the actual validation logic.

public void validateAttribute ( $model, $attribute )
$model yii\base\Model

The data model to be validated

$attribute string

The name of the attribute to be validated.

validateValue() protected method

Validates a value.

A validator class can implement this method to support data validation out of the context of a data model.

protected array|null validateValue ( $value )
$value mixed

The data value to be validated.

return array|null

The error message and the parameters to be inserted into the error message. Null should be returned if the data is valid.

throws yii\base\NotSupportedException

if the validator does not supporting data validation without a model