Good day. There is a custom field in my module mod_expandAjaxReq.xml

<fieldset name="basic" addfieldpath="/modules/mod_expandajaxreq/models/fields">
    <field name="request_url" 


defined('JPATH_PLATFORM') or die;
use Joomla\CMS\Factory;
use Joomla\CMS\Form\FormField;

class JFormFieldEdrop extends FormField
    protected $type = 'edrop';

    protected function getInput()
        $document = JFactory::getDocument();
        $app = JFactory::getApplication();
        if ($app->isAdmin()) {
        $html = array();

        $html[] = '         <span class="input-append">';
        $html[] = '             <input type="url" id="ear_request_url" value="" autocomplete="off" size="30" >';                                                         
        $html[] = '             <button id="ear-btn-article-modal" class="btn btn-primary" type="button" title="Insert link to article" data-toggle="modal" data-target="#earModal"><span class="icon-file-add"></span></button>';
        $html[] = '         </span>';
        /*- Modal-*/ 
        $html[] = '<div  id="earModal" class="modal fade bd-example-modal-lg" tabindex="-1" role="dialog" aria-labelledby="myLargeModalLabel" aria-hidden="true">';
        $html[] = ' <div class="modal-dialog modal-lg">';
        $html[] = '     <div class="modal-content">';
        $html[] = '         <div class="modal-header">';
        $html[] = '             <h4 class="modal-title" id="exampleModalLongTitle">Modal title</h4>';
        $html[] = '             <button type="button" class="close" data-dismiss="modal" aria-label="Close">';
        $html[] = '                 <span aria-hidden="true">&times;</span>';
        $html[] = '             </button>';
        $html[] = '         </div>';
        $html[] = '         <div id="ear-modal-body" class="modal-body">';
        $html[] = '         </div>';
        $html[] = '     </div>';
        $html[] = ' </div>';
        $html[] = '</div>';
        return implode( "\n", $html );

When I click on the ear-btn-article-modal button a modal window opens. I need:

  1. to load a list of articles with a filter field and pagination into the modal window:

    <div id="ear-modal-body" class="modal-body"></div>
  2. when selecting an article, insert a link to the article in the custom field

    <input type="url" id="ear_request_url" value="" autocomplete="off" size="30" >

Please tell me how to implement it?

1 Answer 1


A common solution would be to:

  • Add an input to your modal
  • While typing (or after) trigger an ajax call that gets a list of articles based on your search term and list the results then (incl. article item id) in the modal.
  • Selecting an article from this list triggers a modal close and sets the article id as value of a hidden field in your form (easily by js)

You can do an AJAX call like this from the module backend (JS):

function yourFancyFunctionAjax(moduleId){
let data = {
    'moduleId' : moduleId,
let request = {
    'data': JSON.stringify(data),
    'format': 'json',
    'module': 'modulename_without_mod',
    'method': 'functionNameInHelperPHP'
return jQuery.ajax({
    url: '/index.php',
    type : 'GET',
    data: request,


important is to use the URL "/index.php" otherwise the module searches in the backend path for the helper file.

the method name in helper PHP must be placed in the modules main class and looks like this:

method: myMethod

function name in helper:

public static function myMethodAjax(){...}

hope this helps

  • Thank you. This is understandable. How do I get a list of articles? How is it implemented in the editor, when inserting a link to an article.
    – antarey
    Jul 7, 2021 at 18:40
  • just use the default way for selecting data from the database : docs.joomla.org/Selecting_data_using_JDatabase
    – Marco
    Jul 7, 2021 at 18:54

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