public function Hooks::preUpdate in Lightning Core 8.3

Same name and namespace in other branches

1. 8.5 src/Commands/Hooks.php \Drupal\lightning_core\Commands\Hooks::preUpdate()
2. 8.2 src/Commands/Hooks.php \Drupal\lightning_core\Commands\Hooks::preUpdate()
3. 8.4 src/Commands/Hooks.php \Drupal\lightning_core\Commands\Hooks::preUpdate()

Clears all plugin caches before database updates begin.

A common cause of errors during database updates is update hooks inadvertently using stale data from the myriad caches in Drupal core and contributed modules. To migitate this, we do a bit of cache pruning before database updates begin.

drupal_flush_all_caches() is extremely aggressive because it rebuilds the router and other things, but it's a bit too much of a sledgehammer for our purposes. A good compromise is to clear all plugin discovery caches (which will include entity type definitions).

@hook pre-command updatedb

File

src/Commands/Hooks.php, line 45

Class

Hooks

Implements Drush command hooks.

Namespace

Drupal\lightning_core\Commands

Code

public function preUpdate() {
  $this->pluginCacheClearer
    ->clearCachedDefinitions();
}