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vendor/yiisoft/yii2/rest/UpdateAction.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\rest;
+
+use Yii;
+use yii\base\Model;
+use yii\db\ActiveRecord;
+use yii\web\ServerErrorHttpException;
+
+/**
+ * UpdateAction implements the API endpoint for updating a model.
+ *
+ * For more details and usage information on UpdateAction, see the [guide article on rest controllers](guide:rest-controllers).
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @since 2.0
+ */
+class UpdateAction extends Action
+{
+    /**
+     * @var string the scenario to be assigned to the model before it is validated and updated.
+     */
+    public $scenario = Model::SCENARIO_DEFAULT;
+
+
+    /**
+     * Updates an existing model.
+     * @param string $id the primary key of the model.
+     * @return \yii\db\ActiveRecordInterface the model being updated
+     * @throws ServerErrorHttpException if there is any error when updating the model
+     */
+    public function run($id)
+    {
+        /* @var $model ActiveRecord */
+        $model = $this->findModel($id);
+
+        if ($this->checkAccess) {
+            call_user_func($this->checkAccess, $this->id, $model);
+        }
+
+        $model->scenario = $this->scenario;
+        $model->load(Yii::$app->getRequest()->getBodyParams(), '');
+        if ($model->save() === false && !$model->hasErrors()) {
+            throw new ServerErrorHttpException('Failed to update the object for unknown reason.');
+        }
+
+        return $model;
+    }
+}