Log not working in yii2 - yii2

Question

i want to put a log in app.log ,My config file
'log' => [
'traceLevel' => YII_DEBUG ? 3 : 0,
'targets' => [
'file' => [
'class' => 'yii\log\FileTarget',
'levels' => ['error', 'warning'],
'logFile' => '#root/console/runtime/logs/app.log',
],
]
]
in controller action
public function actionRankCalculation()
{
$allConest = Contest::find()->where('isActive = 1')->all();
Yii::trace('start calculating average revenue');
$response = [];
/** #var Contest $contest */
foreach ($allConest as $contest) {
$videoQuery = Video::find()->where('contest_id = ' . $contest->id);
$videoQuery->andWhere('isActive = 1');
$videoQuery->orderBy([
'global_likes' => SORT_DESC,
'id' => SORT_ASC,
]);
}
But Yii::trace('start calculating average revenue'); not working

Answer 1

You try this.Use categories. For example like below
'targets' => [
[
'class' => 'yii\log\FileTarget',
'levels' => ['error'],
'categories' => ['test1'],
'logFile' => '#app/Test/test1.log',
],
And use below one in controller action
public function actionIndex(){
Yii::error('Test index action', $category = 'test1'); }

Answer 2

Try to set both flushInterval and exportInterval to 1 in console config:
return [
'bootstrap' => ['log'],
'components' => [
'log' => [
'targets' => [
[
'class' => 'yii\log\FileTarget',
'exportInterval' => 1,
],
],
'flushInterval' => 1,
],
],
];
It makes each log message appearing immediately in logs.