If you want the current userid save to the database, you can add the wizard "Author" to the table.
That will create a field "created_by" and "modified_by" for you
When submitting the form, that data will be filled.
In general for injecting data to the form, you have to fork the controller save() function.
Docs about forks:
www.j-cook.pro/index.php/f/forks
First add the hidden field (i.e. yourfield) to the table, but not to the form.
When you have forked the controller file, add in that file:
public function save($key = null, $urlVar = null)
{
//check for session
JSession::checkToken() or JSession::checkToken('get') or jexit(JText::_('JINVALID_TOKEN'));
// get the form
$jinput = JFactory::getApplication()->input;
$data = $jinput->post->get('jform', array(), 'array');
$user = JFactory->getUser();
//inject data
$data["yourfield"] = $user->id; //can be any data, depending on your needs
// set the post var
$jinput->post->set('jform',$data);
// call save of the parent
parent::save($key, $urlVar);
}
Copy the form xml from models/forms/yourtable.xml to fork/models/forms/yourtable.xml
Remove all fields from the fieldset "yourtable.form" and add
<field name="yourfield"
alias="yourfield"
label=""
filter="INT"
type="hidden"/>
By adding an extra field of type hidden, you should see that field as an hidden input on your form (check if it is).
Then, because you are calling parent::save the normal process will be executed (with saving the model to the database with your injected data)
