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vendor/yiisoft/yii2/db/pgsql/JsonExpressionBuilder.php

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+<?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+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 builds [[JsonExpression]] for PostgreSQL DBMS.
+ *
+ * @author Dmytro Naumenko <d.naumenko.a@gmail.com>
+ * @since 2.0.14
+ */
+class JsonExpressionBuilder implements ExpressionBuilderInterface
+{
+    use ExpressionBuilderTrait;
+
+
+    /**
+     * {@inheritdoc}
+     * @param JsonExpression|ExpressionInterface $expression the expression to be built
+     */
+    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);
+    }
+
+    /**
+     * @param JsonExpression $expression
+     * @return string the typecast expression based on [[type]].
+     */
+    protected function getTypecast(JsonExpression $expression)
+    {
+        if ($expression->getType() === null) {
+            return '';
+        }
+
+        return '::' . $expression->getType();
+    }
+}