91 lines
1.6 KiB
Markdown
91 lines
1.6 KiB
Markdown
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# Observers
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Observers maybe used for creating and clearing cache purposes
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## Example observe use
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Create you own class with observer:
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```php
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<?php namespace Dimti\Mirsporta\Classes\Observers;
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use Dimti\Mirsporta\Models;
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use Wpstudio\Helpers\Classes\Observer\BaseObserver;
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class TagObserver extends BaseObserver
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{
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public static function getClass(): string
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{
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return Models\Tag::class;
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}
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}
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```
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Use in models:
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```php
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<?php namespace Dimti\Mirsporta\Models;
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use Dimti\Mirsporta\Classes\Observers;
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class Tag extends Model
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{
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//...
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public function afterSave()
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{
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Observers\TagObserver::clearCache();
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}
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//...
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}
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```
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And in your code for caching data based on this model/observer:
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```php
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use Dimti\Mirsporta\Classes\Observers;
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//...
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$cacheTags = Observers\TagObserver::getCacheTag();
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$cacheKey = CacheManager::formatCacheKey([__CLASS__, __METHOD__, $siteId]);
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\Cache::tags($cacheTags)->rememberForever($cacheKey, fn() =>
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Models\Tag::all()
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));
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```
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* CacheManager::formatCacheKey - that is simple helper for concatenate array elements to string
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## Clearing cache from admin dashboard widget
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### Template
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```html
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<input
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type="button"
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class='btn btn-primary'
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value="Clear tag model cache"
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data-request="<?= $this->getEventHandler('onClearTagCache') ?>"
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data-request-success="$.oc.flashMsg({text: 'Cache of tag model is clearing', 'class': 'success', 'interval': 5}); return false;"
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/>
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```
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### Controller widget action
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```php
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use Dimti\Mirsporta\Classes\Observers;
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//...
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public function onClearTagCache()
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{
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Observers\TagObserver::clearCache();
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return ['status' => 1];
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}
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//...
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```
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