function DbtngExampleUpdateForm::buildForm
Same name in other branches
- 8.x-1.x dbtng_example/src/Form/DbtngExampleUpdateForm.php \Drupal\dbtng_example\Form\DbtngExampleUpdateForm::buildForm()
- 4.0.x modules/dbtng_example/src/Form/DbtngExampleUpdateForm.php \Drupal\dbtng_example\Form\DbtngExampleUpdateForm::buildForm()
Sample UI to update a record.
Overrides FormInterface::buildForm
File
-
modules/
dbtng_example/ src/ Form/ DbtngExampleUpdateForm.php, line 51
Class
- DbtngExampleUpdateForm
- Sample UI to update a record.
Namespace
Drupal\dbtng_example\FormCode
public function buildForm(array $form, FormStateInterface $form_state) {
// Wrap the form in a div.
$form = [
'#prefix' => '<div id="updateform">',
'#suffix' => '</div>',
];
// Add some explanatory text to the form.
$form['message'] = [
'#markup' => $this->t('Demonstrates a database update operation.'),
];
// Query for items to display.
$entries = $this->repository
->load();
// Tell the user if there is nothing to display.
if (empty($entries)) {
$form['no_values'] = [
'#value' => $this->t('No entries exist in the table dbtng_example table.'),
];
return $form;
}
$keyed_entries = [];
$options = [];
foreach ($entries as $entry) {
$options[$entry->pid] = $this->t('@pid: @name @surname (@age)', [
'@pid' => $entry->pid,
'@name' => $entry->name,
'@surname' => $entry->surname,
'@age' => $entry->age,
]);
$keyed_entries[$entry->pid] = $entry;
}
// Grab the pid.
$pid = $form_state->getValue('pid');
// Use the pid to set the default entry for updating.
$default_entry = !empty($pid) ? $keyed_entries[$pid] : $entries[0];
// Save the entries into the $form_state. We do this so the AJAX callback
// doesn't need to repeat the query.
$form_state->setValue('entries', $keyed_entries);
$form['pid'] = [
'#type' => 'select',
'#options' => $options,
'#title' => $this->t('Choose entry to update'),
'#default_value' => $default_entry->pid,
'#ajax' => [
'wrapper' => 'updateform',
'callback' => [
$this,
'updateCallback',
],
],
];
$form['name'] = [
'#type' => 'textfield',
'#title' => $this->t('Updated first name'),
'#size' => 15,
'#default_value' => $default_entry->name,
];
$form['surname'] = [
'#type' => 'textfield',
'#title' => $this->t('Updated last name'),
'#size' => 15,
'#default_value' => $default_entry->surname,
];
$form['age'] = [
'#type' => 'textfield',
'#title' => $this->t('Updated age'),
'#size' => 4,
'#default_value' => $default_entry->age,
'#description' => $this->t('Values greater than 127 will cause an exception'),
];
$form['submit'] = [
'#type' => 'submit',
'#value' => $this->t('Update'),
];
return $form;
}