name : AddSiteColumnToBlueprint.php <?php namespace Statamic\Entries; use Statamic\Events\EntryBlueprintFound; use Statamic\Facades\Site; class AddSiteColumnToBlueprint { public function handle(EntryBlueprintFound $event) { if (! Site::hasMultiple() || ! $this->isOnAllowedRoute()) { return; } $event->blueprint->ensureField('site', [ 'type' => 'sites', 'max_items' => 1, 'listable' => true, ]); } private function isOnAllowedRoute() { if (! $route = optional(request()->route())->getName()) { return false; } return in_array($route, [ 'statamic.cp.collections.show', 'statamic.cp.collections.entries.index', 'statamic.cp.relationship.index', ]); } }