I just tried to create a simple mandatory file upload field in a custom form like this:
public function buildForm(array $form, FormStateInterface $form_state) {
$form['#attributes'] = array('enctype' => "multipart/form-data");
$form['pdf_file'] = array(
'#type' => 'file',
'#title' => $this->t('PDF File'),
'#description' => $this->t('PDF files only'),
//'#multiple' => TRUE,
'#required' => TRUE,
);
$form['submit'] = array(
'#type' => 'submit',
'#value' => $this->t('Save'),
);
return $form;
}
And that did not work.
When submitting a file (no matter what kind of), i get this error all the time:
“PDF File field is required.”
Does anybody have an idea what I am doing wrong?
I am using Drupal 8.2
