R – Drupal 6 hook_form_FORM_ID_alter adding upload file field

drupaldrupal-6

I'm trying to extend a form and add an upload file field from within a module, I can see the file field just fine, but it's empty when I submit the form, the enctype is set.

  $form['#attributes'] = array(
    'enctype' => "multipart/form-data"
  );

  $form['file_upload'] = array(
    '#type' => 'file',
    '#title' => 'Attach Image'
  );

custom form submit hook:

$form['#submit'][] = 'user_images_handler';

is being called, but when I dump the form, the file field is empty, and when I try to access it, it's empty as well.

Best Answer

File uploads are special in that the 'submitted' (uploaded) data does not end up in the form, but needs to be processed separately (uploading is not really a part of form submission but a separate transmission process).

See the docs for file_save_upload(), and as an example, see how it is used on form submission usage from within the upload module.

Basically, you just try to save the upload by calling file_save_upload() with the name of the upload field (and some other arguments) and check the result of this try.

Related Solutions

Drupal 7 – Upload Image Programmatically

I had to do this recently. Here is what I ended up with. Which is to save an image to an image field without using a drupal form.

if(isset($_FILES['image'])){

    $node = node_load($nid);

    //Get the uploaded file from the temp directory.            
    $image = file_get_contents($_FILES['image']['tmp_name']);

    //Create the directory if it does not already exist, otherwise check the permissions
    $directory = 'public://my-image-folder';
    file_prepare_directory($directory, FILE_CREATE_DIRECTORY);

    //Saves a file to the specified destination and creates a database entry.
    $file = file_save_data($image, 'public://my-image-folder/'.$_FILES['image']['name'], FILE_EXISTS_RENAME);

    //Set the file status to permanent so it is not deleted in next cron run
    $file->status = FILE_STATUS_PERMANENT;
    file_save($file);

    //Now we have a saved file and an object for it, just need to add it to the node's image field.
    $node->field_my_image_field[$node->language][0] = (array)$file;

    node_save($node);
}

Drupal 7 – auto submit form after file upload with managed_file type

@Clive That wasn't an option for me since I wanted the users to start the upload themselves. You answer gave me some ideas though and I came up with the following solution.

Drupal.behaviors.fileUpload = {
    attach: function(context, settings) {
        jQuery("body").ajaxComplete(function(event,request, settings){
            // Only do something when on the orders page of a user
            // This is where I use the upload functionality
            if(window.location.pathname.match(/user\/\d+\/orders/)) {
                // Check if the AjaxComplete was triggered by the managed file upload
                // pdf_upload_XXX is my form name
                // Get the form-build-id from the URL
                if (form_build_id = settings.url.match(/file\/ajax\/pdf_upload_\d*\/(.*)$/)) {
                    // Check if the upload has completed by checking if there is a Delete button in the form that has the form-build-id
                    if(jQuery('[value="'+form_build_id[1]+'"]').closest('form').find('[id$=remove-button]').length) {
                        // Click the submit button
                        jQuery('[value="'+form_build_id[1]+'"]').closest('form').find('[id^=edit-submit]').click();
                    }
                }
            }   
        });

    }
}

Hope this is usefull for other users also.

Thnx Clive for setting me on the right path.

Best Answer

Related Solutions

Drupal 7 – Upload Image Programmatically

Drupal 7 – auto submit form after file upload with managed_file type

Related Topic