Drupal: How to Render Results of Form on Same Page

问题:

How would I print the results of a form submission on the same page as the form itself?

Relevant hook_menu:

    $items['admin/content/ncbi_subsites/paths'] = array(
        'title' => 'Paths',
        'description' => 'Paths for a particular subsite',
        'page callback' => 'ncbi_subsites_show_path_page',
        'access arguments' => array( 'administer site configuration' ),
        'type' => MENU_LOCAL_TASK,
    );

page callback:

function ncbi_subsites_show_path_page() {
  $f = drupal_get_form('_ncbi_subsites_show_paths_form');
  return $f;
}

Form building function:

   function _ncbi_subsites_show_paths_form() {
      // bunch of code here

      $form['subsite'] = array(
        '#title' => t('Subsites'),
        '#type' => 'select',
        '#description' => 'Choose a subsite to get its paths',
        '#default_value' => 'Choose a subsite',
        '#options'=> $tmp,
      );

      $form['showthem'] = array(
        '#type' => 'submit',
        '#value' => 'Show paths',
        '#submit' => array( 'ncbi_subsites_show_paths_submit'),    
      );

      return $form;
    }

Submit function (skipped validate function for brevity)

function ncbi_subsites_show_paths_submit( &$form, &$form_state ) {
  //dpm ( $form_state );
  $subsite_name = $form_state['values']['subsite'];
  $subsite = new Subsite( $subsite_name ); //y own class that I use internally in this module
  $paths = $subsite->normalized_paths;

  // build list
  $list = theme_item_list( $paths );
}

If I print that $list variable, it is exactly what I want, but I am not sure how to get it into the page with the original form page built from 'ncbi_subsites_show_path_page'. Any help is much appreciated!

回答1:

The key information in the link Nikit posted is $form_state['rebuild']. Here's some info from Drupal 7 documentation that I believe applies the same for Drupal 6...

$form_state['rebuild']: Normally, after the entire form processing is completed and submit handlers ran, a form is considered to be done and drupal_redirect_form() will redirect the user to a new page using a GET request (so a browser refresh does not re-submit the form). However, if 'rebuild' has been set to TRUE, then a new copy of the form is immediately built and sent to the browser; instead of a redirect. This is used for multi-step forms, such as wizards and confirmation forms. Also, if a form validation handler has set 'rebuild' to TRUE and a validation error occurred, then the form is rebuilt prior to being returned, enabling form elements to be altered, as appropriate to the particular validation error.

回答2:

http://robshouse.net/blog-post/redirect-destination-after-submitting-multi-step-drupal-form

回答3:

This is a full working example of a page and a list on the same page

<?php


/*
* Implements hook_mennu()
*/
function test_menu() {
  $items['test'] = array(
    'title'             => t('Test'),
    'page callback'     => 'test_search_page',
    'access callback'   => True,
  );

  return $items;
}


function test_search_page(){
    $form = drupal_get_form('test_search_form');

    return $form;
}


function test_search_form($form, &$form_state){
  $header = array(t('id'), t('name'), t('firstname'));
  $rows = Null;
  $form['name'] = array(
    '#type'             => 'textfield',
    '#title'            => t('Name'),
    '#required'         => True,
    '#default_value'    => isset($_GET['name']) ? $_GET['name'] : Null
  );

  $form['submit'] = array(
    '#type'           => 'submit',
    '#value'          => t('submit'),
  );



  if (isset($_GET['name'])){
    $rows = get_data();
  }
  $form['table'] = array(
    '#theme' => 'table',
    '#header' => $header,
    '#rows' => $rows,
    '#empty' => t('Aucun résultat.')
  );
  $form['pager'] = array('#markup' => theme('pager'));

  /*
  if (isset($form_state['table'])) {
    $form['table']  = $form_state['table'];
  }
  $form['pager'] = array('#markup' => theme('pager'));
  */
  return $form;
}

function test_search_form_submit($form, &$form_state){
   $form_state['redirect'] = array(
    // $path
    'test',
    // $options
    array('query' => array('name' => $form_state['values']['name'])),
    // $http_response_code
    302,
  );
}

//$header = array(t('id'), t('name'), t('firstname'));

function get_data(){
    $data =  array(
        0   => array(
            'id' => '0',
            'name'  => 'pokpokpok',
            'firstname' => 'pokpokpok',
        ),
        1   => array(
            'id' => '1',
            'name'  => 'pokpokpok',
            'firstname' => 'pokpokpok',
        ),
        2   => array(
            'id' => '2',
            'name'  => 'pokpokpok',
            'firstname' => 'pokpokpok',
        ),
        3   => array(
            'id' => '3',
            'name'  => 'pokpokpok',
            'firstname' => 'pokpokpok',
        ),
        4   => array(
            'id' => '4',
            'name'  => 'pokpokpok',
            'firstname' => 'pokpokpok',
        ),
        5   => array(
            'id' => '5',
            'name'  => 'pokpokpok',
            'firstname' => 'pokpokpok',
        ),
        6   => array(
            'id' => '6',
            'name'  => 'pokpokpok',
            'firstname' => 'pokpokpok',
        ),
        7   => array(
            'id' => '7',
            'name'  => 'pokpokpok',
            'firstname' => 'pokpokpok',
        ),
        8   => array(
            'id' => '8',
            'name'  => 'pokpokpok',
            'firstname' => 'pokpokpok',
        ),
        9   => array(
            'id' => '9',
            'name'  => 'pokpokpok',
            'firstname' => 'pokpokpok',
        ),
        10   => array(
            'id' => '10',
            'name'  => 'pokpokpok',
            'firstname' => 'pokpokpok',
        ),
        11   => array(
            'id' => '11',
            'name'  => 'pokpokpok',
            'firstname' => 'pokpokpok',
        )
    );
    $paging = pager_array_splice($data, 2);

    return $paging;
}
/*
    $header = array(t('id'), t('name'), t('firstname'));

    $form_state['table'] = array(
      '#theme' => 'table',
      '#header' => $header,
      '#rows' => $paging,
      '#empty' => t('Aucun r?sultat.')
    );

    $form_state['rebuild'] = True;*/


function pager_array_splice($data, $limit = 9, $element = 0) {
  global $pager_page_array, $pager_total, $pager_total_items;
  $page = isset($_GET['page']) ? $_GET['page'] : '';

  // Convert comma-separated $page to an array, used by other functions.
  $pager_page_array = explode(',', $page);

  // We calculate the total of pages as ceil(items / limit).
  $pager_total_items[$element] = count($data);
  $pager_total[$element] = ceil($pager_total_items[$element] / $limit);
  $pager_page_array[$element] = max(0, min((int)$pager_page_array[$element], ((int)$pager_total[$element]) - 1));
  return array_slice($data, $pager_page_array[$element] * $limit, $limit, TRUE);
}

回答4:

Drupal6 node.module and dblog.module do this for admin/content/node and admin/reports/dblog by providing a page callback which includes the rendered form in its output.

modules/dblog/dblog.admin.inc
dblog_overview()

modules/node/node.admin.inc
node_admin_nodes()

In form submit, updated filter settings are stored in $_SESSION.

In the page callback it renders the results based on the filter settings stored in $_SESSION.

$_SESSION is just another global here (albeit a persistent one).

回答5:

For Drupal7 I find that if you use $form_state['rebuild'], then the form variables can be best accessed from the PHP super-global variable $_POST (or $_REQUEST). However, if you use $form_state['redirect'], the solution with $_SESSION is better (instead of using $_GET or $_REQUEST).

I find this issue quite tricky even for experts. Maybe Drupal has some more easy and intuitive way that we don't know.