[support] Drupal 7 AHAH/AJAX issue
Kamal Palei
palei.kamal at gmail.com
Mon Sep 10 03:43:58 UTC 2012
Hi List
I am trying to learn ajax stuff in Drupal 7.
I want to have a simple questionnaire form. Where I will have a single
textfield.
In that text field one will type a question category, and if he wants to
type more question categories, user need to click a button "Add More
Categories".
Please see link http://www.netcloudsystems.com/?q=questionnaire/form/manage
The whole source code is at the end of this email. When ajax callback
fires, I want to remember how many textfields I need to add, so that when a
section of form is updated in _form() hook, I can according add those many
textfields.
I am trying to manage that using a variable "$all_categories" and form
element $form['all_categories'] (of type value).
I tried many options, always I find $all_categories value is 1. So I am
unable to add more textfields.
My observation is whatever I set in ajax callback, in _form hook api, I
find value is lost.
Kindly guide me what I am missing.
Best Regards
Kamal
*NECS, Bangalore*
*<?php*
*function questionnaire_menu() {
$items = array();
$items['questionnaire/form/manage'] = array(
'title' => t('Manage questions'),
'page callback' => 'questionnaire_form',
'access arguments' => array('question manage'),
'type' => MENU_SUGGESTED_ITEM,
);*
* return $items;
}*
*function questionnaire_permission()
{
return array(
'question manage' => array(
'title' => t('Question management'),
'description' => t('Provides question management capability'),
),
);
}*
**
**
*function questionnaire_form()
{
return drupal_get_form('questionnaire_my_form');
}*
**
**
*function questionnaire_my_form($form, &$form_state)
{
$form_state['cache'] = TRUE;
$all_categories = !empty($form_state['values']['all_categories']) ?
$form_state['values']['all_categories'] : 1; *
**
* $form['all_categories'] = array(
'#type' => 'value',
'#default_value' => $all_categories,
'#value' => $all_categories);*
**
* // The prefix/suffix provide the div that we're replacing, named by
// #ajax['wrapper'] above.
$form['category_fieldset'] = array(
'#title' => t("Questions Categories"),
'#prefix' => '<div id="category-div">',
'#suffix' => '</div>',
'#type' => 'fieldset',
'#description' => t('Please enter the question categories'),
);*
* for ($i=1; $i<= $all_categories ; $i++)
{
$key = 'ctg' . $i;
$form['category_fieldset']['category'][$key] = array(
'#type' => 'textfield',
'#title' => "Question category $i",
);
} *
* $form['category_fieldset']['add_more_category'] = array(
'#type' => 'submit',
'#value' => t('Add More Categories'),
'#ajax' => array(
'callback' => 'questionnaire_category_callback',
'wrapper' => 'category-div',
'method' => 'replace',
'effect' => 'fade',
),
);
$form['submit'] = array(
'#type' => 'submit',
'#value' => t('Submit'),
);
return $form;
} *
**
*function questionnaire_category_callback($form, &$form_state)
{
$form_state['values']['all_categories'] =
$form_state['values']['all_categories'] + 1;
return $form['category_fieldset'];
}*
**
*?>*
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