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Class yii\db\CheckConstraint

Inheritanceyii\db\CheckConstraint » yii\db\Constraint » yii\base\BaseObject
Implementsyii\base\Configurable
Available since version2.0.13
Source Code https://github.com/yiisoft/yii2/blob/master/framework/db/CheckConstraint.php

CheckConstraint represents the metadata of a table CHECK constraint.

Public Properties

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PropertyTypeDescriptionDefined By
$columnNames string[]|null List of column names the constraint belongs to. yii\db\Constraint
$expression string The SQL of the CHECK constraint. yii\db\CheckConstraint
$name string|null The constraint name. yii\db\Constraint

Public Methods

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MethodDescriptionDefined By
__call() Calls the named method which is not a class method. yii\base\BaseObject
__construct() Constructor. yii\base\BaseObject
__get() Returns the value of an object property. yii\base\BaseObject
__isset() Checks if a property is set, i.e. defined and not null. yii\base\BaseObject
__set() Sets value of an object property. yii\base\BaseObject
__unset() Sets an object property to null. yii\base\BaseObject
canGetProperty() Returns a value indicating whether a property can be read. yii\base\BaseObject
canSetProperty() Returns a value indicating whether a property can be set. yii\base\BaseObject
className() Returns the fully qualified name of this class. yii\base\BaseObject
hasMethod() Returns a value indicating whether a method is defined. yii\base\BaseObject
hasProperty() Returns a value indicating whether a property is defined. yii\base\BaseObject
init() Initializes the object. yii\base\BaseObject

Property Details

$expression public property

The SQL of the CHECK constraint.

public string $expression null