在过去的 3 天里，我一直坚持使用 joomla 2.5 进行下拉列表开发，我必须从数据库中检索数据并在下拉列表中显示这些数据，我遵循的步骤如下所述：
在模型文件夹中，我在字段文件夹中创建了一个新模型并将此文件命名为“fieldname.php”
现在文件“Models/fields/fieldname.php”包含以下源代码：
<?php
defined('JPATH_BASE') or die;
jimport('joomla.html.html');
jimport('joomla.form.formfield');
jimport('joomla.form.helper');
JFormHelper::loadFieldClass('list');
class JFormFieldMyCompany extends JFormFieldList
{
protected $type = 'MyCompany';
public function getOptions()
{
// Initialize variables.
$options = array();
$db = JFactory::getDbo();
$query = $db->getQuery(true);
$query->select('id As value,name As text');
$query->from('#_k2_tags AS a');
$query->order('a.name');
$db = $this->getDbo();
// Get the options.
$db->setQuery($query);
$options = $db->loadObjectList();
// Check for a database error.
if ($db->getErrorNum()) {
JError::raiseWarning(500, $db->getErrorMsg());
}
print_r($options);exit;
return $options;
}
}
在我的模型 filter.php 之后，我添加了以下代码。
模型/filter.php：
<?php
defined( '_JEXEC' ) or die;
jimport('joomla.application.component.modeladmin');
class FiltersModelFilter extends JModelAdmin
{
//Add this handy array with database fields to search in
protected $searchInFields = array('text','a.name');
//Override construct to allow filtering and ordering on our fields
public function __construct($config = array()) {
$config['filter_fields']=array_merge($this->searchInFields,array('a.name'));
parent::__construct($config);
}
public function getTable($type = 'Filter', $prefix = 'FiltersTable', $config = array())
{
return JTable::getInstance($type, $prefix, $config);
}
protected function loadFormData()
{
$data = JFactory::getApplication()->getUserState('com_filters.edit.filter.data', array());
if (empty($data)) {
$data = $this->getItem();
}
return $data;
}
public function getForm($data = array(), $loadData = true)
{
$form = $this->loadForm('com_filters.filter', 'filter', array('control' => 'jform', 'load_data' => $loadData));
return $form;
}
protected function getListQuery(){
$db = JFactory::getDBO();
$query = $db->getQuery(true);
//CHANGE THIS QUERY AS YOU NEED...
$query->select('id As value, name As text')
->from('#_k2_tags AS a');
// Filter search // Extra: Search more than one fields and for multiple words
$regex = str_replace(' ', '|', $this->getState('filter.search'));
if (!empty($regex)) {
$regex=' REGEXP '.$db->quote($regex);
$query->where('('.implode($regex.' OR ',$this->searchInFields).$regex.')');
}
// Filter company
$company= $db->escape($this->getState('filter.name'));
if (!empty($company)) {
$query->where('(a.name='.$company.')');
}
// Filter by state (published, trashed, etc.)
$state = $db->escape($this->getState('filter.state'));
if (is_numeric($state)) {
$query->where('a.published = ' . (int) $state);
}
elseif ($state === '') {
$query->where('(a.published = 0 OR a.published = 1)');
}
//echo $db->replacePrefix( (string) $query );//debug
return $query;
}
/**
* Method to auto-populate the model state.
*
* Note. Calling getState in this method will result in recursion.
*
* @since 1.6
*/
protected function populateState($ordering = null, $direction = null)
{
// Initialise variables.
$app = JFactory::getApplication('administrator');
// Load the filter state.
$search = $this->getUserStateFromRequest($this->context.'.filter.search', 'filter_search');
//Omit double (white-)spaces and set state
$this->setState('filter.search', preg_replace('/\s+/',' ', $search));
//Filter (dropdown) state
$state = $this->getUserStateFromRequest($this->context.'.filter.published', 'filter_state', '', 'string');
$this->setState('filter.state', $state);
//Filter (dropdown) company
$state = $this->getUserStateFromRequest($this->context.'.filter.name', 'filter_company', '', 'string');
$this->setState('filter.name', $state);
//Takes care of states: list. limit / start / ordering / direction
parent::populateState('a.name', 'asc');
}
}
在“Views/filter/view.html.php”里面
<?php
defined( '_JEXEC' ) or die;
jimport( 'joomla.application.component.view');
class FiltersViewFilter extends JView
{
protected $item;
protected $form;
protected $state;
protected $sortColumn;
protected $sortDirection;
protected $searchterms;
public function display($tpl = null)
{
$this->item = $this->get('Item');
$this->state = $this->get('State');
$this->form = $this->get('Form');
$this->state= $this->get('State');
//Following variables used more than once
$this->sortColumn = $this->state->get('list.ordering');
$this->sortDirection= $this->state->get('list.direction');
$this->searchterms= $this->state->get('filter.search');
$this->addToolbar();
parent::display($tpl);
}
public function addToolbar()
{
if ($this->item->ID) {
JToolBarHelper::title(JText::_('Filter Title'));
} else {
JToolBarHelper::title(JText::_('Add Filter Title'));
}
JToolBarHelper::apply('filter.apply', 'JTOOLBAR_APPLY');
JToolBarHelper::save('filter.save', 'JTOOLBAR_SAVE');
JToolBarHelper::save2new('filter.save2new', 'JTOOLBAR_SAVE_AND_NEW');
JToolBarHelper::cancel('filter.cancel');
}
}
在views/filter/tmpl/default.php里面
<?php defined( '_JEXEC' ) or die;
//Get companie options
JFormHelper::addFieldPath(JPATH_COMPONENT . '/models/fields');
$companies = JFormHelper::loadFieldType('MyCompany', false);
$companyOptions=$companies->getOptions(); // works only if you set your field getOptions on public!!
//Get companie options
?>
<form action="index.php?option=com_filters&ID=<?php echo $this->item->ID ?>"
method="post" name="adminForm" class="form-validate">
<fieldset id="filter-bar">
<div class="filter-search fltlft">
<input type="text" name="filter_search" id="filter_search" value="<?php echo $this->escape($this->searchterms); ?>" title="<?php echo JText::_('Search in Names, etc.'); ?>" />
<button type="submit">
<?php echo JText::_('JSEARCH_FILTER_SUBMIT'); ?>
</button>
<button type="button" onclick="document.id('filter_search').value='';this.form.submit();">
<?php echo JText::_('JSEARCH_FILTER_CLEAR'); ?>
</button>
</div>
<div class="filter-select fltrt">
<select name="filter_state" class="inputbox" onchange="this.form.submit()">
<option value="">
<?php echo JText::_('JOPTION_SELECT_PUBLISHED');?>
</option>
<?php echo JHtml::_('select.options', JHtml::_('jgrid.publishedOptions', array('archived'=>false)), 'value', 'text', $this->state->get('filter.published'), true);?>
</select>
<select name="filter_type" class="inputbox" onchange="this.form.submit()">
<option value=""> - Select Company - </option>
<?php echo JHtml::_('select.options', $companyOptions, 'value', 'text', $this->state->get('filter.name'));?>
</select>
</div>
</fieldset>
<div class="width-60 fltlft">
<fieldset class="adminform">
<ul class="adminformlist">
<?php foreach ($this->form->getFieldset() as $field): ?>
<li><?php echo $field->label; ?>
<?php echo $field->input; ?></li>
<?php endforeach ?>
</ul>
</fieldset>
</div>
<input type="hidden" name="task" value="" />
<?php echo JHtml::_('form.token'); ?>
</form>
请帮助我识别我的错误，我需要尽快解决问题。