49 lines
1.2 KiB
PHP
49 lines
1.2 KiB
PHP
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<?php
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/**
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* @link http://www.yiiframework.com/
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* @copyright Copyright (c) 2008 Yii Software LLC
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* @license http://www.yiiframework.com/license/
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*/
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namespace yii\db\mysql;
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use yii\db\ExpressionBuilderInterface;
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use yii\db\ExpressionBuilderTrait;
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use yii\db\ExpressionInterface;
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use yii\db\JsonExpression;
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use yii\db\Query;
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use yii\helpers\Json;
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/**
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* Class JsonExpressionBuilder builds [[JsonExpression]] for MySQL DBMS.
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*
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* @author Dmytro Naumenko <d.naumenko.a@gmail.com>
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* @since 2.0.14
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*/
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class JsonExpressionBuilder implements ExpressionBuilderInterface
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{
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use ExpressionBuilderTrait;
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const PARAM_PREFIX = ':qp';
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/**
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* {@inheritdoc}
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* @param JsonExpression|ExpressionInterface $expression the expression to be built
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*/
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public function build(ExpressionInterface $expression, array &$params = [])
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{
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$value = $expression->getValue();
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if ($value instanceof Query) {
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list ($sql, $params) = $this->queryBuilder->build($value, $params);
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return "($sql)";
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}
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$placeholder = static::PARAM_PREFIX . count($params);
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$params[$placeholder] = Json::encode($value);
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return "CAST($placeholder AS JSON)";
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}
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}
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