title) ?>

'btn btn-success']) ?>

Tips: 只有最新的三条公告对用户可见

$dataProvider, 'filterModel' => $searchModel, 'columns' => [ ['class' => 'yii\grid\SerialColumn'], 'id', [ 'attribute' => 'title', 'format' => 'raw', 'value' => function (Announcements $model) { return Html::a($model->title, ['announcements-view', 'id' => $model->id]); } ], [ 'attribute' => 'content', 'label' => '内容', // if the content is too long, only show the first 30 characters 'value' => function (Announcements $model) { return mb_substr($model->content, 0, 30) . '...'; } ], 'published_at', 'updated_at', [ 'class' => ActionColumn::class, 'urlCreator' => function ($action, Announcements $model, $key, $index, $column) { if ($action === 'view') { return Url::to(['announcements-view', 'id' => $model->id]); } elseif ($action === 'update') { return Url::to(['announcements-update', 'id' => $model->id]); } else { //delete return Url::to(['announcements-delete', 'id' => $model->id]); } } ], ], ]); ?>