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Class yii\db\pgsql\JsonExpressionBuilder

Inheritanceyii\db\pgsql\JsonExpressionBuilder
Implementsyii\db\ExpressionBuilderInterface
Uses Traitsyii\db\ExpressionBuilderTrait
Available since version2.0.14
Source Code https://github.com/yiisoft/yii2/blob/master/framework/db/pgsql/JsonExpressionBuilder.php

Class JsonExpressionBuilder builds yii\db\JsonExpression for PostgreSQL DBMS.

Protected Properties

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Property Type Description Defined By

Public Methods

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Method Description Defined By
__construct() ExpressionBuilderTrait constructor. yii\db\ExpressionBuilderTrait
build() Method builds the raw SQL from the $expression that will not be additionally escaped or quoted. yii\db\pgsql\JsonExpressionBuilder

Protected Methods

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Method Description Defined By
getTypecast() yii\db\pgsql\JsonExpressionBuilder

Method Details

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__construct() public method

Defined in: yii\db\ExpressionBuilderTrait::__construct()

ExpressionBuilderTrait constructor.

public void __construct ( yii\db\QueryBuilder $queryBuilder )
$queryBuilder yii\db\QueryBuilder 

 public function __construct(QueryBuilder $queryBuilder)
{
 $this->queryBuilder = $queryBuilder;
}
build() public method

Method builds the raw SQL from the $expression that will not be additionally escaped or quoted.

public string build ( yii\db\ExpressionInterface $expression, array &$params = [] )
$expression yii\db\JsonExpression|yii\db\ExpressionInterface

The expression to be built
$params array

The binding parameters.
return string

The raw SQL that will not be additionally escaped or quoted.

 

 public function build(ExpressionInterface $expression, array &$params = [])
{
 $value = $expression->getValue();
 if ($value instanceof Query) {
 list ($sql, $params) = $this->queryBuilder->build($value, $params);
 return "($sql)" . $this->getTypecast($expression);
 }
 if ($value instanceof ArrayExpression) {
 $placeholder = 'array_to_json(' . $this->queryBuilder->buildExpression($value, $params) . ')';
 } else {
 $placeholder = $this->queryBuilder->bindParam(Json::encode($value), $params);
 }
 return $placeholder . $this->getTypecast($expression);
}
getTypecast() protected method

protected string getTypecast ( yii\db\JsonExpression $expression )
$expression yii\db\JsonExpression
return string

The typecast expression based on type.

 

 protected function getTypecast(JsonExpression $expression)
{
 if ($expression->getType() === null) {
 return '';
 }
 return '::' . $expression->getType();
}