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I have a form element as follows :

$form['fieldset']['select-user'] = array(
            '#type' => 'select',
            '#title' => t('Select a user'),
            '#options' => select_user_dropdown_options(),
            '#description' => t('Select a user'),
            '#size' => 10,
            '#attributes' => array(
                'style' => 'width:600px',
                'multiple' => 'true'
            )
        );

And in the form submit handler i am processing it as follows :

    /**
     * #submit callback for node_adoption_transfer_form().
     */
    public function submitForm(array &$form, FormStateInterface $form_state) {
        $groupId = $form_state->getValue('select-user-group');
        $groupName = $form_state->getValue('group_name');
        $userId = $form_state->getValue('select-user');
        $groupName = empty($groupName) ? '' : $groupName;
        #print_r($userId);exit;
        foreach ($userId as $key => $value) {
            $query = "select * from {usergroup_user_map} where user_id=$value AND group_id ='$groupId'";
            if (count(db_query($query)->fetchObject()) > 0) {
                continue;
            } else
                db_query("insert into {usergroup_user_map} (user_id,group_name,group_id) values ($value,'$groupName','$groupId')");
        }
     }

But when am printing the $userId its only printing the last value , How to resolve this ?

UPDATE

my issue solved .I was using '#multiple' => 'true' instead of '#multiple' => TRUE , my bad ;) . That saved my day ..

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4

I had same issue , but i solved like this

$form['fieldset']['select-user'] = array(
   '#type' => 'select',
   '#title' => t('Select a user'),
   '#options' => select_user_dropdown_options(),
   '#description' => t('Select a user'),
   '#size' => 10,
   '#multiple' => TRUE,
   '#attributes' => array(
      'id' => 'edit-select-user',
      'style' => 'width:600px',
   )
);

Code: enter image description here

Form: enter image description here

Output in submit:

enter image description here

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  • It doesnt work , even multiple property of select box is not working – Crazyrubixfan Aug 11 '16 at 9:59
  • @icecreamJelly: updated answer with screenshots, refer that may be this will help. And also clear cache if possible. – Ajay Reddy Aug 11 '16 at 10:06
  • I checked , If its not there in attributes array , its not acting as multi select at all – Crazyrubixfan Aug 11 '16 at 12:30
  • User error: "multiple" is an invalid render array key in Drupal\Core\Render\Element::children() (line 102 of core/lib/Drupal/Core/Render/Element.php). – Crazyrubixfan Aug 12 '16 at 8:42
  • Using drupal 8.1.8 version and I am using this in EntityForm. – Ajay Reddy Aug 12 '16 at 9:33

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