[support] Building "add more" feature for managed_file form field type

[Kayode Odeyemi]

On Sat, Sep 17, 2011 at 6:07 PM, Kayode Odeyemi <dreyemi at gmail.com> wrote:

> Hello,
>
> I'm trying to provide the ability to upload more than one file in the
> configuration of one of my custom blocks.
> I got the basics, but everytime I click on upload button, I get this:
>
> *Notice*: Undefined index: uec_core_socials_block_image in *
> uec_core_socials_block_image_validate()
> **Notice*: Undefined index: files_fieldset in *uec_core_socials_block_image_validate()
> *
> *
> *I don't know why I'm getting this because the index is there and works
> for other blocks I have created that way.* *I'm also following the
> ajax_examples module in the examples module.
> *
> *Below is the snippet I'm working with:
>
> function uec_core_block_configure($delta = '') {
>   $form = array();
>     switch($delta) {*
> *case 'uec_core_socials':
>                 $form['#tree'] = TRUE;
>                 $form['files_fieldset'] = array(
>                     '#type' => 'fieldset',
>                     '#title' => t('Upload social icons'),
>                     // Set up the wrapper so that AJAX will be able to
> replace the fieldset.
>                     '#prefix' => '<div id="names-fieldset-wrapper">',
>                     '#suffix' => '</div>',
>                 );
>                 // Build the fieldset with the proper number of files.
> We'll use
>                 // $form_state['num_files'] to determine the number of
> managed_file fields to build.
>                 if (empty($form_state['num_files'])) {
>                     $form_state['num_files'] = 1;
>                 }
>                 // provide ability to add more files
>                 for ($i = 0; $i < $form_state['num_files']; $i++) {
>
> $form['files_fieldset']['uec_core_socials_block_image'][$i] = array(
>                         '#type' => 'managed_file',
>                         '#title' => t('Image'),
>                         '#description' => t('Upload an image to represent
> social icons, allowed extensions: jpg, jpeg, png, gif'),
>                         '#default_value' =>
> variable_get('uec_core_socials_block_image',  ''),
>                         '#element_validate' =>
> array('uec_core_socials_block_image_validate'),
>                         '#upload_location' => 'public://' //If this is not
> set, the file will be uploaded to temporary dir. Then use file_move to move
> it to drupal default file system location
>                     );
>                 }
>                 $form['files_fieldset']['add_file'] = array(
>                     '#type' => 'submit',
>                     '#value' => t('Add one more'),
>                     '#submit' =>
> array('uec_core_socials_add_more_add_one'),
>                     // See the examples in ajax_example.module for more
> details on the
>                     // properties of #ajax.
>                     '#ajax' => array(
>                         'callback' => 'uec_core_socials_add_more_callback',
>                         'wrapper' => 'names-fieldset-wrapper',
>                     ),
>                 );
>                 break;
>     }
>     return $form;
> }
>
>
> /**
>  * Callback for both ajax-enabled buttons.
>  *
>  * Selects and returns the fieldset with the names in it.
>  */
> function uec_core_socials_add_more_callback($form, $form_state) {
>   return $form['files_fieldset'];
> }
>
> /**
>  * Submit handler for the "add-one-more" button.
>  *
>  * Increments the max counter and causes a rebuild.
>  */
> function uec_core_socials_add_more_add_one($form, &$form_state) {
>   $form_state['num_files']++;
>   $form_state['rebuild'] = TRUE;
> }
>
> function uec_core_socials_block_image_validate($form, &$form_state) {
>     variable_set('uec_core_socials_block_image',
> $form_state['values']['files_fieldset']['uec_core_socials_block_image']);
>     //variable_set('uec_core_socials_block_image',
> $form_state['values']['uec_core_socials_block_image']);
> }
>
> I'll like to know what I'm doing wrong.
>

I was able to fix it with this:

variable_set('uec_core_socials_block_image',
$form_state['values']['settings']['files_fieldset']['uec_core_socials_block_image']);




-- 
Odeyemi 'Kayode O.
http://www.sinati.com. t: @charyorde
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