Using Zend_Form with Jquery for Efficient File Upload Error Handling

After making changes to my JavaScript, the code now looks like this:

$('.zend_form input:not([type="file"]), .zend_form textarea').each(function() {
    data[$(this).attr('name')] = $(this).val();
});

Greetings,

I recently watched a ZendCast tutorial on using jQuery to detect and display errors in forms for users.

However, I encountered an issue with file fields always returning "File 'image_front_url' exceeds the defined ini size" error message even when the file is within size limits.

Template For Forms:

<?php $this->headScript()->captureStart(); ?>

$(function() { 

    $('.zend_form input, .zend_form textarea').blur(function() {
        var formElementId = ($(this).parent().prev().find('label').attr('for'));
        doValidation(formElementId);
    });
});


function doValidation(id) {

    var url = '/<?php echo MODULE; ?>/json/validateform/form_name/<?php echo get_class($this->form); ?>';
    var data = {};

    $('.zend_form input, .zend_form textarea').each(function() {
        data[$(this).attr('name')] = $(this).val();
    });

    $.post(url, data, function(resp) {
        $('#'+id).parent().find('.errors').remove();
        $('#'+id).parent().append(getErrorHtml(resp[id], id));
    }, 'json');

};

function getErrorHtml(formErrors, id) {

    var o = '';
    if (formErrors != null) {
    var o = '<ul id="errors-'+id+'" class="errors">';

    for (errorKey in formErrors) {
        o += '<li>'+formErrors[errorKey]+'</li>';
    }
    o += '</ul>';
    }
    return o;
}

<?php $this->headScript()->captureEnd(); ?>


<?php 
if (is_object($this->form) && $this->form->getErrorMessages()) {
    echo $this->partial('partials/errors.phtml', array('errors' => $this->form->getErrorMessages(), 'translate' => $this->translate));
}
?>

<?php if (isset($this->errorMsg)) { ?>
    <p><?php echo $this->errorMsg; ?></p>
<?php } ?>

<?php echo $this->form; ?>

This code snippet pertains to

<?php

class Administration_JsonController extends Zend_Controller_Action {


    public function validateformAction() {

        $form_name  = $this->_getParam('form_name');
        $form       = new $form_name();
        $data       = $this->_getAllParams();

        $form->isValidPartial($data);
        $json = $form->getMessages();
        $this->_helper->json($json);
    }

}

An example of the JSON response:

{"name":{"isEmpty":"Value is required and can't be empty"},"name_url":{"isEmpty":"Value is required and can't be empty"},"image_site_url":{"fileUploadErrorIniSize":"File 'image_site_url' exceeds the defined ini size"},"image_url":{"fileUploadErrorIniSize":"File 'image_url' exceeds the defined ini size"},"image_front_url":{"fileUploadErrorIniSize":"File 'image_front_url' exceeds the defined ini size"},"image_back_url":{"fileUploadErrorIniSize":"File 'image_back_url' exceeds the defined ini size"}}

After reading about others experiencing similar issues who suggested using isValidPartial method, I made the change from

$form->isValid($data);

to

$form->isValidPartial($data);

but unfortunately, it did not resolve the problem.

Any solutions or suggestions are welcome?

Answer №1

The issue at hand arises when trying to handle file fields in the same way as regular text fields.

While using $('input').val(), you will retrieve the actual text value for a text field, but for a file field, you will only access the file name rather than its contents.

Subsequently, the script attempts to verify the file name as if it were the actual file and encounters difficulties. To pass through the file validator successfully, one must provide the genuine file contents to the script.

In essence, achieving successful validation requires asynchronously uploading the file to the server for all necessary checks.

Regrettably, accomplishing file uploads via Ajax proves to be quite complex. Options include utilizing an iFrame or swfObject. Various plugins cater to this purpose and can be explored here.

If opting for asynchronous file upload, I recommend leveraging the file-uploader jQuery plugin.

Answer №2

Have you considered encrypting the data on your form?

I came across two separate forum discussions regarding this issue, one of which is a post on Stack Overflow:

Unusual behavior with Zend_Form_Element_File

Make sure to include enctype="multipart/form-data" in your form tag.

The problem lies in the fact that the form is currently using the default "application/x-www-form-urlencoded" encryption method, which does not support file uploads.

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