Laravel: Cache with pagination clear issue - laravel

Question

I have laravel (7.x) application. I recently added the cache functionality for the performance boost. After implementing the cache functionality, I was having trouble with the pagination while loading the data in grid format, so I googled for the solution and found this Pagination with cache in Laravel.
Although, it did solve my problem. But, the case is that I have about 100 pages and due to the solution I found, each page has it's own cache. Now, if I create or update any record then it doesn't reflect in the grid because the data is loaded from the cache.
PostController.php:
...
$arraySearch = request()->all();
# calculating selected tab
$cache = (!empty(request()->inactive)) ? 'inactive' : 'active';
$cacheKey = strtoupper("{$this->controller}-index-{$cache}-{$arraySearch['page']}");
# caching the fetch data
$arrayModels = cache()->remember($cacheKey, 1440, function() use ($arraySearch) {
# models
$Post = new Post();
# returning
return [
'active' => $Post->_index(1, 'active', $arraySearch),
'inactive' => $Post->_index(0, 'inactive', $arraySearch),
];
});
...
Post.php:
public function _index($status = 1, $page = null, $arraySearch = null)
{
...
$Self = self::where('status', $status)
->orderBy('status', 'ASC')
->orderBy('title', 'ASC')
->paginate(10);
...
return $Self;
}
How do I clear all this cache to show the newly created or updated record to with the updated values.?

Answer 1

1. Store All pages under the same tag:
As seen on the documentation: https://laravel.com/docs/master/cache#storing-tagged-cache-items
You can use tags to group cached items.
$cacheTag = strtoupper("{$this->controller}-index-{$cache}");
$arrayModels = cache()->tags([$cacheTag])->remember($cacheKey, 1440, function() use ($arraySearch) {
...
2. Set an event listener on Post to clear the tag
You can run an Event listener on your Post update() or create() events.
https://laravel.com/docs/7.x/eloquent#events-using-closures
You can then clear the tag cache using
Cache::tags([$cacheTag])->flush();

Answer 2

I know this isn't the proper solution. But, until I find the proper way to do it, this is the option I am kind of stuck with.
PostController.php:
public function index()
{
...
$arraySearch = request()->all();
# calculating selected tab
$cache = (!empty(request()->inactive)) ? 'inactive' : 'active';
$cacheKey = strtoupper("{$this->controller}-index-{$cache}-{$arraySearch['page']}");
# caching the fetch data
$arrayModels = cache()->remember($cacheKey, 1440, function() use ($arraySearch) {
# models
$Post = new Post();
# returning
return [
'active' => $Post->_index(1, 'active', $arraySearch),
'inactive' => $Post->_index(0, 'inactive', $arraySearch),
];
});
...
}
public function store()
{
...
Artisan::call('cache:clear');
...
}
I'll post the proper solution when I find one. Till then I am using this one.

Answer 3

There is a method in Laravel Model class called booted (not boot, which is having a different purpose). This method runs every time something is "saved" (including "updated") or "deleted".
I have used this as following (in a Model; or a Trait, included in a Model):
protected static function booted(): void
{
$item = resolve(self::class);
static::saved(function () use ($item) {
$item->updateCaches();
});
static::deleted(function () use ($item) {
$item->updateCaches();
});
}
"updateCaches" is a method in the Trait (or in the Model), that can have the code to update the cache.