PHP Class yii\validators\ExistValidator

ExistValidator checks if the value being validated can be found in the table column specified by the ActiveRecord class [[targetClass]] and the attribute [[targetAttribute]]. This validator is often used to verify that a foreign key contains a value that can be found in the foreign table. The following are examples of validation rules using this validator: php a1 needs to exist ['a1', 'exist'] a1 needs to exist, but its value will use a2 to check for the existence ['a1', 'exist', 'targetAttribute' => 'a2'] a1 and a2 need to exist together, and they both will receive error message [['a1', 'a2'], 'exist', 'targetAttribute' => ['a1', 'a2']] a1 and a2 need to exist together, only a1 will receive error message ['a1', 'exist', 'targetAttribute' => ['a1', 'a2']] a1 needs to exist by checking the existence of both a2 and a3 (using a1 value) ['a1', 'exist', 'targetAttribute' => ['a2', 'a1' => 'a3']]

Since: 2.0

Author: Qiang Xue ([email protected])

Inheritance: extends Validator

显示文件 Open project: yiisoft/yii2 Class Usage Examples

Public Properties

Property	Type	Description
$allowArray		whether to allow array type attribute.
$filter		additional filter to be applied to the DB query used to check the existence of the attribute value. This can be a string or an array representing the additional query condition (refer to [[\yii\db\Query::where()]] on the format of query condition), or an anonymous function with the signature function ($query), where $query is the [[\yii\db\Query\|Query]] object that you can modify in the function.
$targetAttribute		the name of the ActiveRecord attribute that should be used to validate the existence of the current attribute value. If not set, it will use the name of the attribute currently being validated. You may use an array to validate the existence of multiple columns at the same time. The array values are the attributes that will be used to validate the existence, while the array keys are the attributes whose values are to be validated. If the key and the value are the same, you can just specify the value.
$targetClass		the name of the ActiveRecord class that should be used to validate the existence of the current attribute value. It not set, it will use the ActiveRecord class of the attribute being validated.

Public Methods

Method	Description
init ( )
validateAttribute ( $model, $attribute )

Protected Methods

Method	Description
createQuery ( string $targetClass, mixed $condition ) : yii\db\ActiveQueryInterface	Creates a query instance with the given condition.
validateValue ( $value )

Method Details

createQuery() protected method

Creates a query instance with the given condition.

protected createQuery ( string $targetClass, mixed $condition ) : yii\db\ActiveQueryInterface
$targetClass	string	the target AR class
$condition	mixed	query condition
return	yii\db\ActiveQueryInterface	the query instance

init() public method

public init ( )

validateAttribute() public method

public validateAttribute ( $model, $attribute )

validateValue() protected method

protected validateValue ( $value )

Property Details

$allowArray public_oe property

whether to allow array type attribute.

public $allowArray

$filter public_oe property

additional filter to be applied to the DB query used to check the existence of the attribute value. This can be a string or an array representing the additional query condition (refer to [[\yii\db\Query::where()]] on the format of query condition), or an anonymous function with the signature function ($query), where $query is the [[\yii\db\Query|Query]] object that you can modify in the function.

public $filter

$targetAttribute public_oe property

the name of the ActiveRecord attribute that should be used to validate the existence of the current attribute value. If not set, it will use the name of the attribute currently being validated. You may use an array to validate the existence of multiple columns at the same time. The array values are the attributes that will be used to validate the existence, while the array keys are the attributes whose values are to be validated. If the key and the value are the same, you can just specify the value.

public $targetAttribute

$targetClass public_oe property

the name of the ActiveRecord class that should be used to validate the existence of the current attribute value. It not set, it will use the ActiveRecord class of the attribute being validated.