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- <?php
- namespace yii\db\pgsql;
- use yii\db\ArrayExpression;
- use yii\db\ExpressionBuilderInterface;
- use yii\db\ExpressionBuilderTrait;
- use yii\db\ExpressionInterface;
- use yii\db\JsonExpression;
- use yii\db\Query;
- use yii\helpers\Json;
- class JsonExpressionBuilder implements ExpressionBuilderInterface
- {
- use ExpressionBuilderTrait;
-
- 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);
- }
-
- protected function getTypecast(JsonExpression $expression)
- {
- if ($expression->getType() === null) {
- return '';
- }
- return '::' . $expression->getType();
- }
- }
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