FullCalendar：如何从db获取数据并在事件中显示（作为json feed）

I am a newbie to fullcalendar and ajax. I have difficulty in fetching data from the database and those data should be shown up in my fullcalendar. I have tried a code to do the same. but i am not able to get data through ajax as a json feed. So far i am getting data from the database through codeigniter MVC. but i coulnt pass data to the fullcalendar event.I am a newbie to fullcalendar and ajax. I have