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Class yii\db\ArrayExpression

All Classes | Methods

Inheritance	yii\db\ArrayExpression
Implements	ArrayAccess, Countable, IteratorAggregate, yii\db\ExpressionInterface
Available since version	2.0.14
Source Code	https://github.com/yiisoft/yii2/blob/master/framework/db/ArrayExpression.php

Class ArrayExpression represents an array SQL expression.

Expressions of this type can be used in conditions as well:

$query->andWhere(['@>', 'items', new ArrayExpression([1, 2, 3], 'integer')])

which, depending on DBMS, will result in a well-prepared condition. For example, in PostgreSQL it will be compiled to WHERE "items" @> ARRAY[1, 2, 3]::integer[].

Public Methods

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Method	Description	Defined By
__construct()	ArrayExpression constructor.	yii\db\ArrayExpression
count()	Count elements of an object	yii\db\ArrayExpression
getDimension()		yii\db\ArrayExpression
getIterator()	Retrieve an external iterator	yii\db\ArrayExpression
getType()		yii\db\ArrayExpression
getValue()		yii\db\ArrayExpression
offsetExists()	Whether a offset exists	yii\db\ArrayExpression
offsetGet()	Offset to retrieve	yii\db\ArrayExpression
offsetSet()	Offset to set	yii\db\ArrayExpression
offsetUnset()	Offset to unset	yii\db\ArrayExpression

Method Details

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__construct() public method

ArrayExpression constructor.

public void __construct ( $value, $type = null, $dimension = 1 )
$value	array\|yii\db\QueryInterface\|mixed	The array content. Either represented as an array of values or a Query that returns these values. A single value will be considered as an array containing one element.
$type	string\|null	The type of the array elements. Defaults to `null` which means the type is not explicitly specified. In case when type is not specified explicitly and DBMS can not guess it from the context, SQL error will be raised.
$dimension	integer	The number of indices needed to select an element

Source code

                public function __construct($value, $type = null, $dimension = 1)
{
    if ($value instanceof self) {
        $value = $value->getValue();
    }
    $this->value = $value;
    $this->type = $type;
    $this->dimension = $dimension;
}

count() public method (available since version 2.0.14)

Count elements of an object

public integer count ( )
return	integer	The custom count as an integer. The return value is cast to an integer.

Source code

                #[\ReturnTypeWillChange]
public function count()
{
    return count($this->value);
}

getDimension() public method

public integer getDimension ( )
return	integer	The number of indices needed to select an element

Source code

                public function getDimension()
{
    return $this->dimension;
}

getIterator() public method (available since version 2.0.14.1)

Retrieve an external iterator

public Traversable getIterator ( )
return	Traversable	An instance of an object implementing Iterator or Traversable
throws	yii\base\InvalidConfigException	when ArrayExpression contains QueryInterface object

Source code

                #[\ReturnTypeWillChange]
public function getIterator()
{
    $value = $this->getValue();
    if ($value instanceof QueryInterface) {
        throw new InvalidConfigException('The ArrayExpression class can not be iterated when the value is a QueryInterface object');
    }
    if ($value === null) {
        $value = [];
    }
    return new \ArrayIterator($value);
}

getType() public method

public string\|null getType ( )

Source code

                public function getType()
{
    return $this->type;
}

getValue() public method

public array\|mixed\|yii\db\QueryInterface getValue ( )

Source code

                public function getValue()
{
    return $this->value;
}

offsetExists() public method (available since version 2.0.14)

Whether a offset exists

public boolean offsetExists ( $offset )
$offset	mixed	An offset to check for.
return	boolean	True on success or false on failure. The return value will be casted to boolean if non-boolean was returned.

Source code

                #[\ReturnTypeWillChange]
public function offsetExists($offset)
{
    return isset($this->value[$offset]);
}

offsetGet() public method (available since version 2.0.14)

Offset to retrieve

public mixed offsetGet ( $offset )
$offset	mixed	The offset to retrieve.
return	mixed	Can return all value types.

Source code

                #[\ReturnTypeWillChange]
public function offsetGet($offset)
{
    return $this->value[$offset];
}

offsetSet() public method (available since version 2.0.14)

Offset to set

public void offsetSet ( $offset, $value )
$offset	mixed	The offset to assign the value to.
$value	mixed	The value to set.

Source code

                #[\ReturnTypeWillChange]
public function offsetSet($offset, $value)
{
    $this->value[$offset] = $value;
}

offsetUnset() public method (available since version 2.0.14)

Offset to unset

public void offsetUnset ( $offset )
$offset	mixed	The offset to unset.

Source code

                #[\ReturnTypeWillChange]
public function offsetUnset($offset)
{
    unset($this->value[$offset]);
}