Is there a way, to load with an XML element, the custom fields, from the Joomla component, com_fields in the backend of a module? I know how to take them from the default.php and display them, but I was wondering if there is a way to load them in the backend of a module administration and then reproduce them like a repeatable field? Thank you in advance!

  • Welcome to JSE. Please take our tour. Feb 16, 2021 at 23:07
  • Short answer is no. Slightly longer answer is why would you want that? Or put another way: why would a subform in the module's xml config not be sufficient? Feb 17, 2021 at 23:04
  • Hello and thank you for your answer. I am developing a module and I want to store besides the repeatable fields values, informations like when the field was created or edited and by whom. So I thought that by creating a custom field and by the time is stored in the database I could acces thise kind of informations.
    – leno1232
    Feb 17, 2021 at 23:57
  • Sounds like you need a component Feb 18, 2021 at 22:45

1 Answer 1


You can do this with a content plugin quite easily. See this guide for starters.

You create the XML in your plugin form/modwhatever.xml. Now you can add whatever fields you wish - you might want to look at the articles form for examples of user, publishing dates etc, which can be located in administrator/components/com_content/models/forms/article.xml.

Your plugin would implement a method like so:

    public function onContentPrepareForm($form, $data)

        $app = JFactory::getApplication();
        $option = $app->input->get('option');

        switch ($option) {

            case 'mod_whatever':

                if ($app->isAdmin()) {

                    JForm::addFormPath(__DIR__ . '/forms');

                    $form->loadFile('modwhatever', false);


                return true;


        return true;


To ensure you don't need to apply any further changes, you can use the attribs form as a basis so that your new fields are available on the modules params, e.g.:

<?xml version="1.0" encoding="UTF-8"?>
  <fields name="attribs">
     <fieldset name="customstuff" label="Custom Stuff">


  • thank you Grant G . I implemented with simple repeatable fields. But I have another question. Where are the repeatable field values stored in the database?
    – leno1232
    Feb 24, 2021 at 0:08
  • @leno1232 I answered on your other question. Depending on how you added the fields, it is entirely possible that they are not saved to the database. For instance, if your XML sets a name <fields name="doesnotalreadyexist">, then it will not save.
    – Grant G
    Feb 24, 2021 at 0:25
  • thank you for answering my questions! I am grateful!
    – leno1232
    Feb 24, 2021 at 0:44
  • @len Please take our tour and then please read: meta.stackexchange.com/a/5235/352329 Feb 24, 2021 at 2:03

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