By peterk900 on

I have a custom form which creates nodes. The form is re-displayed with the original values after submission or if I include $form_state['rebuild'] = TRUE; the re-display has all the fields empty.

I want to be able to change the fields that are re-displayed - for example setting some to "" and leaving others at their previous value.

I have tried various options - some do nothing whereas others break the form.

Here is the code for the submit function:

function fe4_form_submit($form, &$form_state) {

global $user;

$values = array(
  'type' => 'prices',
  'uid' => $user->uid,
  'status' => 1,
  'comment' => 1,
  'promote' => 0,
);
$entity = entity_create('node', $values);
$ewrapper = entity_metadata_wrapper('node', $entity);
$ewrapper->title->set('My E Title');
$entity->field_product_name[LANGUAGE_NONE][0] = array('value' => $form_state['values']['product_name'] );
$entity->field_price[LANGUAGE_NONE][0] = array('value' => $form_state['values']['price'] );
$ewrapper->save(TRUE);
drupal_set_message( "Node with nid " . $ewrapper->getIdentifier() . " saved!\n");

$newvalue = 9934.09;

//---none of these work 
//form_set_value($form['field_product_name'], array(0 => array('value' => $newvalue)), $form_state);
//$form_state['values']['price'] = $newvalue;
//$form['price'][#default_value] = $newvalue;
//$form['price'] = array ( 'value' => $newvalue);
//$form_state['values']['price'][LANGUAGE_NONE][0]['value'] = $newvalue;
//$form_state['values']['price'][0]['value'] = $newvalue;


//$form_state['rebuild']  = TRUE;

}

I am obviously missing something important in my understanding of the Form API. I hope someone can point out what it is ! Thanks.

⋅ Categories: Drupal 7.x

Comments

Jaypan’s picture

Jaypan commented 

function some_form($form, &$form_state)
{
  $form['field_1'] = array
  (
    '#type' => 'textfield',
    '#title' => t('Enter something'),
    '#default_value' = isset($form_state['values']) ? $form_state['values']['field_1'] : '',
  );

  $form['field_2'] = array
  (
    '#type' => 'textfield',
    '#title' => t('Enter something else'),
    '#default_value' = isset($form_state['values']) ? $form_state['values']['field_2'] : '',
  );

}

function some_form_submit($form, &$form_state)
{
  $form_state['rebuild'] = TRUE;
  form_set_value($form['field_2'], 'You entered: . '$form_state['values']['field_2'], $form_state);
}

This should get you started. After submission, the value of field_1 will be the value entered into field_1. The value of field_2 will be "You entered [value of field 2]".

peterk900’s picture

peterk900 commented

Here is the module code - but unfortunately it makes no changes to the form fields on submit as indicated by the form_set_value line.


function fe6_menu() {
  $items = array();

  $items['examples/fe6'] = array( 
    'title' => 'Example Form', 
    'description' => 'A form to mess around with.',
    'page callback' => 'drupal_get_form', 
    'page arguments' => array('fe6_form'), 
    'access callback' => TRUE
  );

  return $items;
}



function fe6_form($form, &$form_state)
{
  $form['field_1'] = array
  (
    '#type' => 'textfield',
    '#title' => t('Enter something'),
    '#default_value' => isset($form_state['values']) ? $form_state['values']['field_1'] : '',
  );

  $form['field_2'] = array
  (
    '#type' => 'textfield',
    '#title' => t('Enter something else'),
    '#default_value' => isset($form_state['values']) ? $form_state['values']['field_2'] : '',
  );
  
   $form['submit_button'] = array(
    '#type' => 'submit',
    '#value' => t('Click Here!'),
  );
  
  return $form;

}

function fe6_form_submit($form, &$form_state)
{
  $form_state['rebuild'] = TRUE;
  form_set_value($form['field_2'], 'You entered:'.$form_state['values']['field_2'], $form_state);
  
}

Have I misunderstood something ?

Jaypan’s picture

Jaypan commented

No, I gave you bad code! I didn't realize you can't use form_set_value() in a submit handler.

Change this:

  form_set_value($form['field_2'], 'You entered:'.$form_state['values']['field_2'], $form_state);

To this:

 $form_state['input']['field_2'] = 'You entered:' . $form_state['values']['field_2'];

And actually, you can remove #default_value from both form inputs.

just_jordan’s picture

just_jordan commented

is there any updated way to do this? *Exception has occurred: Cannot use object of type FormState as array

I understand that you can use the -> to access properties

***Edit: found a different solution using normal button with ajax commands: AppendCommand and RemoveCommand

Jaypan’s picture

Jaypan commented

This code is for Drupal 7, it won't work in Drupal 8.

sahil.shaikh’s picture

sahil.shaikh commented

In submit function for unsetting field values after submission of form

unset($form_state->getUserInput()['field_1']);