Documentation tutorial: Why is my JFormFieldList showing a textbox?

Question

I was going through this part of the tutorial:
https://docs.joomla.org/J3.x:Developing_an_MVC_Component/Using_the_database
Except I tried using my own names instead of 'helloworld'.

---

Everything else works fine, even the site-page loads the text from the database. The problem is:

On the backend 'Menu Item' options, where there's supposed to be a list, it's just showing a blank textbox.

---

The codes I've used are:

site/views/uploadwizard/tmpl/default.xml:

<metadata>
    <layout title="COM_OMITTED_UPLOADWIZARD_VIEW_DEFAULT_TITLE">
        <message>COM_OMITTED_UPLOADWIZARD_VIEW_DEFAULT_DESC</message>
    </layout>

    <fields
        name="request"
        addfieldpath="/administrator/components/com_omitted/models/fields"
        >
        <fieldset name="request">
            <field
                name="id"
                type="ulwiz_wmode"
                label="COM_OMITTED_UPLOADWIZARD_FIELD_WMODE_LABEL"
                description="COM_OMITTED_UPLOADWIZARD_FIELD_WMODE_DESC"
                />
        </fieldset>
    </fields>
</metadata>

admin/models/fields/ulwiz_wmode.php:

<?php
defined('_JEXEC') or die('Restricted access');

JFormHelper::loadFieldClass('list');

class JFormFieldUlWiz_WMode extends JFormFieldList
{
    protected function getOptions()
    {
        $db    = JFactory::getDBO();
        $query = $db->getQuery(true);
        $query->select('id,wmode');
        $query->from('#__omitted_ulwiz_wmode');
        $db->setQuery((string) $query);
        $messages = $db->loadObjectList();
        $options  = array();

        if ($messages)
        {
            foreach ($messages as $message)
            {
                $options[] = JHtml::_('select.option', $message->id, $message->wmode);
            }
        }

        $options = array_merge(parent::getOptions(), $options);

        return $options;
    }
}

And the Database description:

DROP TABLE IF EXISTS `#__omitted_ulwiz_wmode`;

CREATE TABLE `#__omitted_ulwiz_wmode` (
    `id`        INT(11)     NOT NULL AUTO_INCREMENT,
    `wmode`     VARCHAR(25) NOT NULL,
    `published` tinyint(4)  NOT NULL DEFAULT '1',
    PRIMARY KEY (`id`)
)

    ENGINE =MyISAM
    AUTO_INCREMENT =0
    DEFAULT CHARSET =utf8;

INSERT INTO `#__omitted_ulwiz_wmode` (`wmode`) VALUES
('Option1Text'),
('Option2Text');

---

How do I fix this? I've been at it for hours and am unable to move over to the next part of the tutorial hence.

Answer 1

The problem is that it is not able to get the field. I see filename you have defined as ulwiz_wmode.php and in class name you are using this JFormFieldUlWiz_WMode. Make sure the naming convention is very proper and should be same as class name and filename. It should be JFormFieldUlwiz_wmode.

<?php
defined('_JEXEC') or die('Restricted access');

JFormHelper::loadFieldClass('list');

class JFormFieldUlwiz_wmode extends JFormFieldList
{
   protected $type = 'ulwiz_wmode'; //also add this line

   protected function getOptions()
    {
        //your code
    }
}

You are creating your own custom field. For more details on custom fields refer this documentation:

https://docs.joomla.org/Creating_a_custom_form_field_type