Can I customize which data will be pass in the dependent field? i.e instead of just first_name. i want to display first_name and last_name column in the field.
The dependent field makes an AJAX call by default that returns the models' Base_module_model::ajax_options() method that gets routed through fuel/modules/fuel/controllers/Module::ajax() controller method. You can change the AJAX request URL to be something else (note the URL parameter documentation here): http://docs.getfuelcms.com/general/forms#dependent
Comments
http://docs.getfuelcms.com/general/forms#dependent