abstract class DemoBase in Examples for Developers 3.x
Same name and namespace in other branches
- 8 form_api_example/src/Form/DemoBase.php \Drupal\form_api_example\Form\DemoBase
Implements common submit handler used in form_api_example demo forms.
We extend FormBase, which is the simplest form base class used in Drupal, to add a common submitForm method that will display the submitted values via the Messenger service.
Hierarchy
- class \Drupal\Core\Form\FormBase implements ContainerInjectionInterface, FormInterface uses DependencySerializationTrait, LoggerChannelTrait, MessengerTrait, RedirectDestinationTrait, StringTranslationTrait
- class \Drupal\form_api_example\Form\DemoBase
Expanded class hierarchy of DemoBase
See also
File
- modules/
form_api_example/ src/ Form/ DemoBase.php, line 17
Namespace
Drupal\form_api_example\FormView source
abstract class DemoBase extends FormBase {
/**
* Implements a form submit handler.
*
* @param array $form
* The render array of the currently built form.
* @param \Drupal\Core\Form\FormStateInterface $form_state
* Object describing the current state of the form.
*/
public function submitForm(array &$form, FormStateInterface $form_state) {
// Find out what was submitted.
$values = $form_state
->getValues();
foreach ($values as $key => $value) {
$label = isset($form[$key]['#title']) ? $form[$key]['#title'] : $key;
// Many arrays return 0 for unselected values so lets filter that out.
if (is_array($value)) {
$value = array_filter($value);
}
// Only display for controls that have titles and values.
if ($value) {
$display_value = is_array($value) ? print_r($value, 1) : $value;
$message = $this
->t('Value for %title: %value', [
'%title' => $label,
'%value' => $display_value,
]);
$this
->messenger()
->addMessage($message);
}
}
}
}
Members
Name | Modifiers | Type | Description | Overrides |
---|---|---|---|---|
DemoBase:: |
public | function |
Implements a form submit handler. Overrides FormInterface:: |
2 |
DependencySerializationTrait:: |
protected | property | ||
DependencySerializationTrait:: |
protected | property | ||
DependencySerializationTrait:: |
public | function | 2 | |
DependencySerializationTrait:: |
public | function | 2 | |
FormBase:: |
protected | property | The config factory. | 3 |
FormBase:: |
protected | property | The request stack. | 1 |
FormBase:: |
protected | property | The route match. | |
FormBase:: |
protected | function | Retrieves a configuration object. | |
FormBase:: |
protected | function | Gets the config factory for this form. | 3 |
FormBase:: |
private | function | Returns the service container. | |
FormBase:: |
public static | function |
Instantiates a new instance of this class. Overrides ContainerInjectionInterface:: |
105 |
FormBase:: |
protected | function | Gets the current user. | |
FormBase:: |
protected | function | Gets the request object. | |
FormBase:: |
protected | function | Gets the route match. | |
FormBase:: |
protected | function | Gets the logger for a specific channel. | |
FormBase:: |
protected | function | Returns a redirect response object for the specified route. | |
FormBase:: |
public | function | Resets the configuration factory. | |
FormBase:: |
public | function | Sets the config factory for this form. | |
FormBase:: |
public | function | Sets the request stack object to use. | |
FormBase:: |
public | function |
Form validation handler. Overrides FormInterface:: |
72 |
FormInterface:: |
public | function | Form constructor. | 192 |
FormInterface:: |
public | function | Returns a unique string identifying the form. | 264 |
LoggerChannelTrait:: |
protected | property | The logger channel factory service. | |
LoggerChannelTrait:: |
protected | function | Gets the logger for a specific channel. | |
LoggerChannelTrait:: |
public | function | Injects the logger channel factory. | |
MessengerTrait:: |
protected | property | The messenger. | 27 |
MessengerTrait:: |
public | function | Gets the messenger. | 27 |
MessengerTrait:: |
public | function | Sets the messenger. | |
RedirectDestinationTrait:: |
protected | property | The redirect destination service. | 1 |
RedirectDestinationTrait:: |
protected | function | Prepares a 'destination' URL query parameter for use with \Drupal\Core\Url. | |
RedirectDestinationTrait:: |
protected | function | Returns the redirect destination service. | |
RedirectDestinationTrait:: |
public | function | Sets the redirect destination service. | |
StringTranslationTrait:: |
protected | property | The string translation service. | 4 |
StringTranslationTrait:: |
protected | function | Formats a string containing a count of items. | |
StringTranslationTrait:: |
protected | function | Returns the number of plurals supported by a given language. | |
StringTranslationTrait:: |
protected | function | Gets the string translation service. | |
StringTranslationTrait:: |
public | function | Sets the string translation service to use. | 2 |
StringTranslationTrait:: |
protected | function | Translates a string to the current language or to a given language. |