Yii2 PageCache invalidation - caching

Question

Is there any possibility to invalidate or delete PageCache for a particular action.
Consider this:
class SiteController extends Controller
{
public function behaviors()
{
return [
'pageCache' => [
'class' => PageCache::className(),
'duration' => Yii::$app->params['cacheTime'], // seconds
'variations' => [
Yii::$app->language,
Yii::$app->request->get('id'),
],
],
];
}
public function actionIndex( $id )
{
// action code
}
}
And now I want to remove/invalidate cache for
action en/site/index?id=1
Currently I am thinking to write some code in a console app but do not know how to achieve this.
EDIT1: I try to rebuild-invalidate cache manually for a specific action. The code can't relay on 'dependency' because it is almost impossible to implement for that action.
EDIT2: The task is to rebuild cache only for the specific action (page) leave other cache intact.

Answer 1

You can use TagDependency for more granular invalidation:
public function behaviors()
{
return [
'pageCache' => [
'class' => PageCache::className(),
'duration' => Yii::$app->params['cacheTime'], // seconds
'variations' => [
Yii::$app->language,
Yii::$app->request->get('id'),
],
'dependency' => new \yii\caching\TagDependency([
'tags' => [
Yii::$app->requestedRoute,
Yii::$app->request->get('id'),
],
]),
],
];
}
To invalidate cache:
TagDependency::invalidate(Yii::$app->cache, [
'site/index', // route of action
123, // ID of page
]);

Answer 2

If someone else needs ...
Yii2 does not provide a native function to invalidate the cache of a specific page, however there is the delete function of the cache component. It would however be necessary to know the generated key for the requested page but the function that generates this key is protected (calculateCacheKey ()). In this way, the best way would be to create your own class extending \yii\filters\PageCache.
'pageCache' => function () {
return new class extends \yii\filters\PageCache{
public function init(){
parent::init();
$this->except = ['index'];
$this->duration = Yii::$app->params['cacheTime'], // seconds;
$this->variations = [
Yii::$app->language,
Yii::$app->request->get('id'),
];
if(Yii::$app->request->get('IC') == 1)
Yii::$app->cache->delete($this->calculateCacheKey());
}
public function beforeCacheResponse(){
return Yii::$app->request->get('IC') != 1;
}
};
},
In the provided code, for simplicity, I am using an anonymous class (PHP 7).
Instead you can create your class as you wish and inform its path as the 'class' parameter, as seen in the configuration displayed in the question.
Note that I am using a simple logic to invalidate the cache, checking if there is a GET parameter IC == 1, you can use whatever logic you want.
If after invalidating the cache you do not want a new cache to be created, simply return false in beforeCacheResponse, it is from \yii\filters\PageCache.

Answer 3

You can invalidate the cache by using dependencies
'pageCache' => [
...
'dependency' => [
'class' => 'yii\caching\DbDependency',
'sql' => 'SELECT COUNT(*) FROM post',
],
http://www.yiiframework.com/doc-2.0/yii-filters-pagecache.html#$dependency-detail

Answer 4

If I understand correctly you are trying to disable caching only for a specific action and according to the DOCS you can use the following options to explicitly identify which action IDs to apply the cache filter OR which action IDs it should not.
$except array List of action IDs that this filter should not apply to. yii\base\ActionFilter
$only array List of action IDs that this filter should apply to.
The following should work for you
return [
'pageCache' => [
'class' => PageCache::className(),
'except'=>['index']
'duration' => Yii::$app->params['cacheTime'], // seconds
'variations' => [
Yii::$app->language,
Yii::$app->request->get('id'),
],
],
];