Question
Cacheability of render arrays.
How to Cache, clear cache (basend on time , tag) of a drupal 8 render array ?
Cache configuration of a renderer array (Just an exaple)
$render_array = [
'#markup' => 'Time : ' . date("H:i:s"),
'#cache' => [
'keys' => ['entity_view', 'node', $node->id()],
'contexts' => ['languages'],
'tags' => ['node:' . $node->id()],
'max-age' => \Drupal\Core\Cache\Cache::PERMANENT,
],
];
Example 1. Disable Cache of a render array.
$render_array = [
'#markup' => 'Time : ' . date("H:i:s"),
'#cache' => [
'disabled' => TRUE,
],
];
Example 2. Time Based Cache.
$render_array = [
'#markup' => 'Time : ' . date("H:i:s"),
'#cache' => [
'max_age'=> 0, //No cache (Like 'disabled' => TRUE,)
'max_age'=> 60, //60 seconds / 1 minute
'max_age'=> 3600, //3600 seconds / 1 hour
],
];
Example 3. Tags Based Cache.
$render_array = [
'#markup' => 'Time : ' . date("H:i:s"),
'#cache' => [
'tags' => ['your_module' . ':' . 'your_tag'],
],
];
Link : https://www.drupal.org/developing/api/8/render/arrays/cacheability
API : https://api.drupal.org/api/drupal/core!lib!Drupal!Core!Render!theme.api.php/group/theme_render/8.2.x
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