# Class yii\db\conditions\ExistsCondition

Inheritance | yii\db\conditions\ExistsCondition
Implements | yii\db\conditions\ConditionInterface
Available since version | 2.0.14
Source Code | https://github.com/yiisoft/yii2/blob/master/framework/db/conditions/ExistsCondition.php

Condition that represents `EXISTS` operator.

## Public Methods

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Method | Description | Defined By
--- | --- | ---
__construct() | ExistsCondition constructor. | yii\db\conditions\ExistsCondition
fromArrayDefinition() | Creates object by array-definition as described in Query Builder – Operator format guide article. | yii\db\conditions\ExistsCondition
getOperator() |  | yii\db\conditions\ExistsCondition
getQuery() |  | yii\db\conditions\ExistsCondition

## Method Details

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__construct() public method

ExistsCondition constructor.

public void __construct ( $operator, $query )
$operator | string | The operator to use (e.g. `EXISTS` or `NOT EXISTS`)
$query | yii\db\Query | The yii\db\Query object representing the sub-query.

Source code

                    public function __construct($operator, $query)
    {
        $this->operator = $operator;
        $this->query = $query;
    }

fromArrayDefinition() public static method

Creates object by array-definition as described in Query Builder – Operator format guide article.

public static $this fromArrayDefinition ( $operator, $operands )
$operator | string | Operator in uppercase.
$operands | array | Array of corresponding operands
throws | yii\base\InvalidParamException | if input parameters are not suitable for this condition

Source code

                    public static function fromArrayDefinition($operator, $operands)
    {
        if (!isset($operands[0]) || !$operands[0] instanceof Query) {
            throw new InvalidArgumentException('Subquery for EXISTS operator must be a Query object.');
        }
        return new static($operator, $operands[0]);
    }

getOperator() public method

public string getOperator ( )

Source code

                    public function getOperator()
    {
        return $this->operator;
    }

getQuery() public method

public yii\db\Query getQuery ( )

Source code

                    public function getQuery()
    {
        return $this->query;
    }