4.2 Extbase Controllers and Actions

Question 1 of 19

1

Which statements about Extbase controllers are correct? (2)

Select one or more of the following:

Extbase controllers are always interfaces
Every controller must directly extend the basis controller
TYPO3\CMS\Extbase\Mvc\Controller\ActionController
The visibility of all properties should be protected
All method names in a controller must end in Action()
The logic implemented in controllers should be kept to a minimum

Explanation

Question 2 of 19

1

What are the characteristics of the methods redirect() and forward() in a controller? (2)

Select one or more of the following:

The redirect() method requires the controller name of the target as an argument
The redirect() method initiates a new HTTP request
The forward() method transfers the request to the target action automatically
The forward() method changes the URL in the way that the action name appears
The redirect() and forward() methods both clear the cache

Explanation

Question 3 of 19

1

What are the differences between the controller methods forward() and redirect()? (2)

Select one or more of the following:

There are no differences
Method $this->forward() is set as $this->request->setDispatched(false)
Method $this->redirect() initiates a new HTTP request; method $this->forward() does not
Method $this->forward() does not accept any arguments, $this->redirect() does
Method $this->redirect() renders a template by default; method $this->forward() does not

Explanation

Question 4 of 19

1

How can you generate a HTTP status code 400? (2)

Select one or more of the following:

die(400, null, 'Bad Request.')
$this->addError(400, null, 'Bad Request.')
new \TYPO3\CMS\Extbase\Error\Error(400, null, 'Bad Request.')
$this->throwStatus(400, null, 'Bad Request.')
Instantiate a response object and set the status code as \GuzzleHttp\Psr7\Response(400)

Explanation

Question 5 of 19

1

What are the characteristics of controllers? (2)

Select one or more of the following:

Controllers are the control and central processing unit in the MVC stack
Controllers are responsible for initialising domain models
The logic implemented in controllers should be kept to a minimum
All business logic should be implemented in controllers
Controllers validate all objects

Explanation

Question 6 of 19

1

Which statements about “actions” in Extbase’s controller/action concept are correct? (3)

Select one or more of the following:

Action methods are always static functions
Actions are public methods of a controller class
Names of action methods always end in Action, for example listAction()
Each action must be stored in a separate PHP file under Classes/Actions/
To be able to request an action of a plugin, the action has to be registered by using
configurePlugin()
Action methods must always return a string (this is the content shown in the frontend)

Explanation

Question 7 of 19

1

How can a fallback to the default action be achieved, in order to prevent an error if a non-configured action is
called? (1)

Select one or more of the following:

This is the default behaviour of Extbase
An appropriate configuration in file ext_localconf.php is required
The TypoScript setting callDefaultActionIfActionCantBeResolved can be configured
An errorAction() method can be implemented in the controller
The key routing can be used in TypoScript

Explanation

Question 8 of 19

1

How can a “Page Not Found” error message be displayed – HTTP code 404 – if a non-configured action is called? (1)

Select one or more of the following:

This is the default behaviour of Extbase
An appropriate configuration in the ext_localconf.php file is required
The TypoScript setting exceptionHandler can be configured
An errorAction() method can be implemented in the controller
The TypoScript setting throwPageNotFoundExceptionIfActionCantBeResolved can be configured

Explanation

Question 9 of 19

1

Which approach is officially recommended to get an object in a controller? (1)

Select one or more of the following:

use \Vendor\MyExtension\Domain\Repository\TagRepository;
...
$this->objectManager->get(TagRepository::class)
use \Vendor\MyExtension\Domain\Repository\TagRepository;
...
$this->objectManager->create(TagRepository::class)
new \Vendor\MyExtension\Domain\Repository\TagRepository
use \Vendor\MyExtension\Domain\Repository\TagRepository;
...
$this->instanceManager->make(TagRepository::class)
use \TYPO3\CMS\Core\Utility\GeneralUtility;
use \Vendor\MyExtension\Domain\Repository\TagRepository;
...
GeneralUtility::makeInstance(TagRepository::class);

Explanation

Question 10 of 19

1

Where is the Object Manager available as $this->objectManager by default? (2)

Select one or more of the following:

In repositories
In ViewHelpers
In Fluid templates
In controllers
In domain models

Explanation

Question 11 of 19

1

Which statements about the view in a controller are correct? (2)

Select one or more of the following:

You can access the output of a view by using the method render()
The view can only be rendered at the end of an action method
The view is available in the action as $this->view
To prevent rendering the view, the action must return false
It is not possible to render a different view than the default one

Explanation

Question 12 of 19

1

How do you prevent an action from being executed? (2)

Select one or more of the following:

The action can be omitted from the TypoScript key switchableControllerActions
The action can be omitted from the first array of the plugin configuration in file ext_localconf.php
The action can be omitted from the second array of the plugin configuration in file ext_localconf.php
By setting the attribute deactivate in file tables.php
By configuring the action in the page TS key deniedActions

Explanation

Question 13 of 19

1

How can an invalid domain object $blog be accessed in an action new? (2)

Select one or more of the following:

This is always possible
Via the initializeNewAction() method
Via the errorNewAction() method
Via the newAction() method if the annotation @ignorevalidation $blog is set
Via the __destruct() method

Explanation

Question 14 of 19

1

What is the purpose of the method errorAction() in a controller? (1)

Select one or more of the following:

This method is executed if an error in the controller occurs
This method is executed if an error in the view occurs
This method is executed before the primary action
This method is always executed after the primary action
This method is executed if a validation error in the controller occurs

Explanation

Question 15 of 19

1

How can validation errors of an object $blog be accessed in a controller? (1)

Select one or more of the following:

This is not possible
By $blog->getErrors()
By $this->getErrors()
By $this->controllerContext->getRequest()->getErrors()
By $this->errors

Explanation

Question 16 of 19

1

How can a non-persisting object be created from a GET request? (1)

Select one or more of the following:

This happens automatically if the object is passed to the method as a parameter in the action
By using the “Object Type Converter”
By manually executing convertArrayToObject() in the Property Mapper
By setting the property mapping in TypoScript

Explanation

Question 17 of 19

1

What is the purpose of the following method in a controller? (2)

use \TYPO3\CMS\Core\Utility\ArrayUtility;
...
public function initializeAction()
{
$settings = [
...
];

ArrayUtility::mergeRecursiveWithOverrule(
$this->settings,
$settings
);
}

Select one or more of the following:

FlexForm settings are merged with TypoScript settings
Custom settings are merged with TypoScript settings
All empty values in the arrays, both $settings and $this->settings, are removed
Keys with a value __UNSET in the array $settings unset array keys with the same name in the array $this->settings

Explanation

Question 18 of 19

1

How do you retrieve the data of the current content object in Extbase? (1)

Select one or more of the following:

By accessing getContentObject()->data of the ConfigurationManager
By accessing $this->request->getContentObjectData()
By accessing $this->cObj->data
By accessing $this->cObj->cObjGetSingle()

Explanation

Question 19 of 19

1

In which file are custom Type Converters registered? (1)

Select one or more of the following:

File ext_tables.php
File ext_localconf.php
The controller
File Configuration/TCA/table.php
File Configuration/TypoScript/setup.typoscript

	Created by Pascal Bartl about 3 years ago

TYPO3 CD 2020 (zweite Auflage) Quiz on 4.2 Extbase Controllers and Actions, created by Pascal Bartl on 09/04/2021.

4.2 Extbase Controllers and Actions

Question 1 of 19

Which statements about Extbase controllers are correct? (2)

Select one or more of the following:

Explanation

Question 2 of 19

What are the characteristics of the methods redirect() and forward() in a controller? (2)

Select one or more of the following:

Explanation

Question 3 of 19

What are the differences between the controller methods forward() and redirect()? (2)

Select one or more of the following:

Explanation

Question 4 of 19

How can you generate a HTTP status code 400? (2)

Select one or more of the following:

Explanation

Question 5 of 19

What are the characteristics of controllers? (2)

Select one or more of the following:

Explanation

Question 6 of 19

Which statements about “actions” in Extbase’s controller/action concept are correct? (3)

Select one or more of the following:

Explanation

Question 7 of 19

How can a fallback to the default action be achieved, in order to prevent an error if a non-configured action is called? (1)

Select one or more of the following:

Explanation

Question 8 of 19

How can a “Page Not Found” error message be displayed – HTTP code 404 – if a non-configured action is called? (1)

Select one or more of the following:

Explanation

Question 9 of 19

Which approach is officially recommended to get an object in a controller? (1)

Select one or more of the following:

Explanation

Question 10 of 19

Where is the Object Manager available as $this->objectManager by default? (2)

Select one or more of the following:

Explanation

Question 11 of 19

Which statements about the view in a controller are correct? (2)

Select one or more of the following:

Explanation

Question 12 of 19

How do you prevent an action from being executed? (2)

Select one or more of the following:

Explanation

Question 13 of 19

How can an invalid domain object $blog be accessed in an action new? (2)

Select one or more of the following:

Explanation

Question 14 of 19

What is the purpose of the method errorAction() in a controller? (1)

Select one or more of the following:

Explanation

Question 15 of 19

How can validation errors of an object $blog be accessed in a controller? (1)

Select one or more of the following:

Explanation

Question 16 of 19

How can a non-persisting object be created from a GET request? (1)

Select one or more of the following:

Explanation

Question 17 of 19

What is the purpose of the following method in a controller? (2) use \TYPO3\CMS\Core\Utility\ArrayUtility; ... public function initializeAction() { $settings = [ ... ]; ArrayUtility::mergeRecursiveWithOverrule( $this->settings, $settings ); }

Select one or more of the following:

Explanation

Question 18 of 19

How do you retrieve the data of the current content object in Extbase? (1)

Select one or more of the following:

Explanation

Question 19 of 19

In which file are custom Type Converters registered? (1)

Select one or more of the following:

Explanation

How can a fallback to the default action be achieved, in order to prevent an error if a non-configured action is
called? (1)

What is the purpose of the following method in a controller? (2)

use \TYPO3\CMS\Core\Utility\ArrayUtility;
...
public function initializeAction()
{
$settings = [
...
];

ArrayUtility::mergeRecursiveWithOverrule(
$this->settings,
$settings
);
}