38.1. A Global "Export" Action

  There are actually three different types of actions in EasyAdmin. The first consists of the normal actions, like Add, Edit, Delete, and Detail. These operate on a single entity. The second type is batch actions, which operate on a selection of entities. For example, we can click two of these check boxes and use the Delete button up here. That is the batch Delete, and it's the only built-in batch action.

  Side note: to make sure approved questions aren't deleted - which is work we just finished, you should also remove the batch Delete action for the Question crud. Otherwise, people might try to batch Delete questions. That won't work... thanks to some code we wrote, but they'll get a very-unfriendly 500 error.

  Anyways, the third type of action is called a "global action", which operates on all the entities in a section. There are no built-in global actions, but we're going to add one: a button to "export" the entire questions list to a CSV file.

  Creating the Global Action
  - For the most part, creating a global action... isn't much different than creating a normal custom action. It starts the same. Over in the actions config, create a new $exportAction = Action::new() and call it export. Below, we'll ->linkToCrudAction() and also call it export. Then, add some CSS classes... and an icon. Cool. We're ready to add this to the index page: ->add(Crud::PAGE_INDEX, $exportAction) to get that button on the main list page.

  If we stopped now, this would be a normal action. When we refresh... yup! It shows up next to each item in the list. Not what we wanted.

src/Controller/Admin/QuestionCrudController.php

@@ -105,6 +105,11 @@ public function configureActions(Actions $actions): Actions {
 				return !$question->getIsApproved();
 			});
 
+		$exportAction = Action::new('export')
+			->linkToCrudAction('export')
+			->addCssClass('btn btn-success')
+			->setIcon('fa fa-download');
+
 		return parent::configureActions($actions)
 			->update(Crud::PAGE_INDEX, Action::DELETE, function(Action $action){
 				$action->displayIf(static function(Question $question){
@@ -122,7 +127,8 @@ public function configureActions(Actions $actions): Actions {
 			->setPermission(Action::BATCH_DELETE, 'ROLE_SUPER_ADMIN')
 			->add(Crud::PAGE_DETAIL, $viewAction()->addCssClass('btn btn-success'))
 			->add(Crud::PAGE_INDEX, $viewAction())
-			->add(Crud::PAGE_DETAIL, $approveAction);
+			->add(Crud::PAGE_DETAIL, $approveAction)
+			->add(Crud::PAGE_INDEX, $exportAction);
 	}
 
 	public function configureFilters(Filters $filters): Filters {