Hi David
It is not available in the current version. However, I think you can do it with a small hack into the extension. The file you will need to modify is components/com_eventbooking/helper/fields.php, look at line 127 : (under _renderTextBox($row) function)
Code:
<input type="text" name="<?php echo $row->name ; ?>" class="<?php echo $row->css_class; ?>" size="<?php echo $row->size ; ?>" value="<?php echo $postedValue ; ?>" />
Change it to :
Code:
<input type="text" name="<?php echo $row->name ; ?>" class="<?php echo $row->css_class; ?>" size="<?php echo $row->size ; ?>" value="<?php echo $postedValue ; ?>" <?php $row->name == 'NAME_OF_THE_FIELD' ? ' readonly="readonly"' : '' ;?> />
The idea is that if the custom field name is NAME_OF_THE_FIELD (you need to replace with a correctly name), we will add readonly property to the custom field so that registrants cannot change it.
Hope this will give an idea. If you know PHP code , this will be easy to modify .
Thanks,
Tuan
