如何通过yii2中的参数从数据库中获取数据？

Question

I have 2 database tables:

user

id | name,

message

id | sender_id | receiver_id.

How can I generate custom view and get data by sender_id and receiver_id? I mean when user log in he will see his inbox and outbox messages. Please explain the logic of this. I also will be glad if you will provide code examples because I am newbie in php and yii2. If something is not understandable I will explain more specifically.

Answer 1

You are really short on details, but I assume you want to display both incoming and sent messages by matching current user ID (logged in user) with both receiver_id and sender_id and display them in a gridview.

An approach could be:

public function actionIndex()
{
    $user = Yii::$app->user->identity;

    $searchModel = new MesssageSearch();
    $dataProvider = $searchModel->search(Yii::$app->request->queryParams);

    // filter on ownership of either sender or receiver
    $dataProvider
        ->query
        ->andWhere(['receiver_id' => $user->id])
        ->orWhere(['sender_id' => $user->id]);

    $dataProvider->setSort([
        'defaultOrder' => ['created_at' => SORT_DESC],
    ]);

    return $this->render('index', [
        'searchModel' => $searchModel,
        'dataProvider' => $dataProvider,
    ]);
}

This assumes you have limited access to logged-in users otherwise you need to catch the case when Yii::$app->user is null.