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Final Class Yiisoft\Db\Constraint\Check

All Classes | Properties | Methods

Inheritance	Yiisoft\Db\Constraint\Check

Represents a CHECK constraint in a database.

A CHECK constraint is a constraint that allows you to specify a condition that must be met for the data to be inserted or updated.

The constraint checks that the value of a specified column or expression meets a certain condition, if the condition isn't met, an error will be thrown, and the data won't be inserted or updated.

Public Properties

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Property	Type	Defined By
$columnNames	array	Yiisoft\Db\Constraint\Check
$expression	string	Yiisoft\Db\Constraint\Check
$name	string	Yiisoft\Db\Constraint\Check

Public Methods

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Method	Description	Defined By
__construct()		Yiisoft\Db\Constraint\Check

Property Details

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$columnNames public property

public array $columnNames = []

$expression public property

public string $expression = ''

$name public property

public string $name = ''

Method Details

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__construct() public method

public mixed __construct ( string $name = '', string[] $columnNames = [], string $expression = '' )
$name	string	The constraint name.
$columnNames	string[]	The list of column names the constraint belongs to.
$expression	string	The SQL of the `CHECK` constraint.

Source code

                public function __construct(
    public readonly string $name = '',
    public readonly array $columnNames = [],
    public readonly string $expression = '',
) {}