Yii2: how to use component in ActiveController default action

问题

As docs say: [[yii\rest\IndexAction|index]]: list resources page by page

response has view:

curl -i -H "Accept:application/json" "http://192.168.100.5/index.php/tweets"
HTTP/1.1 200 OK
Date: Wed, 30 Mar 2016 12:10:07 GMT
Server: Apache/2.4.7 (Ubuntu)
X-Powered-By: PHP/5.5.9-1ubuntu4.14
X-Pagination-Total-Count: 450
X-Pagination-Page-Count: 23
X-Pagination-Current-Page: 1
X-Pagination-Per-Page: 20
Link: <http://192.168.100.5/tweets?page=1>; rel=self, <http://192.168.100.5/tweets?page=2>; rel=next, <http://192.168.100.5/tweets?page=23>; rel=last
Content-Length: 4305
Content-Type: application/json; charset=UTF-8

[{"id":71,"text":"Juíza do RS Graziela Bünd.......

I have component which one return - some array (selection from two tables). If i customize indexAction.

  public function actions()
    {
        $actions = parent::actions();
        unset($actions['update']);
        unset($actions['delete']);
        unset($actions['view']);
       unset($actions['index']);

        return $actions;
    }

    public function actionIndex($count = 10)
    {
        /** @var TweetLastfinder $tweetLastFinder */
        $tweetLastFinder = Yii::$app->get('tweetlastfinder');

        return $tweetLastFinder->findLastTweets($count);
    }

Response have correct content but has view:

curl -i -H "Accept:application/json" "http://192.168.100.5/index.php/tweets"
HTTP/1.1 200 OK
Date: Wed, 30 Mar 2016 12:15:36 GMT
Server: Apache/2.4.7 (Ubuntu)
X-Powered-By: PHP/5.5.9-1ubuntu4.14
Content-Length: 2282
Content-Type: application/json; charset=UTF-8

[{"id":605,"text":"Popular Mus......

In this case i cant use $serializer, show _meta etc

I want to use response from component and list resources page by page as it do default action. How it should be done properly?

回答1:

To get full use of the built in yii\rest\Serializer and show _meta or have your urls to look like:

/tweets?page=5&per-page=12&sort=name

your action should return a data provider object that implements the DataProviderInterface which can be any of those:

an Active Data Provider
SQL Data Provider
an Array Data Provider
or a Custom Data Provider

So it all depends on what kind of object $tweetLastFinder->findLastTweets() is returning. If the findLastTweets method is returning an ActiveQuery object like:

public function findLastTweets($count)
{
    ...
    return $Tweets::find();
}

Then just put it into an ActiveDataProvider instance:

use yii\data\ActiveDataProvider;

public function actionIndex($count = 10)
{
    /** @var TweetLastfinder $tweetLastFinder */
    $tweetLastFinder = Yii::$app->get('tweetlastfinder');

    $tweets = $tweetLastFinder->findLastTweets();

    return new ActiveDataProvider([
        'query' => $tweets,
    ]);
}

If it returns an array of data or something you can convert to an array then just put it into an ArrayDataProvider instance. If it is a more complex object then you'll need to build a custom Data Provider inside which you can wrap it. See how to do that in related docs.

来源：https://stackoverflow.com/questions/36309034/yii2-how-to-use-component-in-activecontroller-default-action

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