Insert DB Value into Form Field - php

Question

The Question: How do I insert values from a database table (#__mytable) into form text fields (motitle and modescription) which have been rendered from an XML file within the Joomla 3.0 platform?
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I've been trying for days to solve this "easy" Joomla! based undocumented challenge.
I have followed Joomla!'s guide for Developing an MVC, read most of their out-of-date documentation and torn apart the com_content component but have still no idea how to populate my fields.
I've been playing with $this->form->bind($this->item);.
Below I have included some of my code to show the structure I am using. Please feel free to point out any issues you spot along the way.
Models\Forms\item.xml
<?xml version="1.0" encoding="UTF-8"?>
<form>
<fields name="groupOPTIONS">
<fieldset name="Options">
<field
type="text"
name="motitle"
id="motitle"
label="Title"
description="MY TEXT FIELD DESCRIPTION"
maxLength="255" />
<field
type="textarea"
name="modescription"
id="modescription"
label="Description"
description="MY TEXT FIELD DESCRIPTION"
rows="15"
cols="5"
maxLength="255" />
</fieldset>
</fields>
</form>
Models\item.php
jimport('joomla.application.component.modelitem');
class MagicObjectsModelItem extends JModelForm {
public function getForm($data = array(), $loadData = true) {
// Get the form 'items'
$form = $this->loadForm('com_magicobjects.item', 'item',
array('control' => 'jform', 'load_data' => $loadData));
if (empty($form)) {
return false;
}
return $form;
}
protected function loadFormData() {
// Check the session for previously entered form data.
$data = JFactory::getApplication()->getUserState('com_magicobjects.item.edit.data', array());
if (empty($data)) {
$data = $this->getDBItem(1);
}
return $data;
}
public function getDBItem($pk) {
//Obtain JDatabase static connection
$oDb = JFactory::getDbo();
$oQuery = $oDb->getQuery(true);
$sValueToMatch = $pk;
$oQuery
->select(array('mid', 'name', 'keyword', 'description'))
->from('#__mytable')
->where('mid = "' . $sValueToMatch . '"')
->order('mid ASC');
$oDb->setQuery($oQuery);
return $oDb->loadObjectList();
}
views\item\view.html.php
jimport('joomla.application.component.view');
function display($tpl = null) {
// Initialise variables.
$this->form = $this->get('Form');
$this->item = $this->get('Item');
//Display the view
parent::display($tpl);
}
Views\item\tmpl\default.php
foreach ($this->form->getFieldset('Options') as $field) {
echo $field->label;
echo $field->input;
}
By performing a print_r() on item I can see I have the data, but I need to insert the data into the fields shown.

Answer 1

In case this it's still a problem because the form definition is defining a <fields /> group.
This mean that the form fields will be output as follows:
input type="text" name="[groupOPTIONS][motitle]"
based on the example you give above. If you remove the fields grouping it will probably work. It's annoying though as certain JForm methods only work on groups...
You would probably need to change the way in which the data was being passed into the form if you wanted to keep the fields grouping (e.g. by overloading getItem).
Hope that makes sense...

Answer 2

In Joomla 3, the JForm::bind() method appears to accept either an object or associative array as a parameter. All of the object/array fields are then stored in a protected JRegistry type data member called JForm::$data.
When you're trying to display a form field (by calling JForm::getInput()), the call stack is as follows
JForm::getInput() -> JForm::getField() -> JForm::loadField() -> JForm::getValue()
JForm::getValue() returns a value from the (aforementioned JRegistry) JForm::$data data member. The JForm::loadField() method also passes the default value (defined by the form) to the JForm::getValue() method in case a value in the JForm::$data variable doesn't exist.
In terms of doing this inside a model, you might want to generate a object or assoc array from a database query or table (ensuring that the field names correspond with the field names defined in the form xml) and then pass it to JForm::bind() as a parameter. However, if you are using JModelForm, I think you should only override JModelForm::loadFormData() to pass the object/assoc array to the loaded form.
See : libraries/joomla/form/form.php
Hope that helps :)

Answer 3

Instead of $oDb->loadObjectList(); use $oDb->loadAssoc(); in your getDBItem() function.
Check this - http://docs.joomla.org/Accessing_the_database_using_JDatabase/1.5
Check this also - joomla loadformdata
Hope this will work.