Could anyone tell me how to populate/save selected values from dropdown values in database using AngularJS, Javascript and MongoDB.?

[Tech Learn]

The following are my requirement before asking this to you people am really too tired of finding solution for that issue..

hope you guys help me..!!

well,
1. I'Ve a dropDwonList with 50 items.
if user select or change multiple values based on their requirement, the dropdownlist should be added one by one.

now, i need to save the user selected values from dropdown in database. here am using AngularJS and MonogoDB, Javascript (am totally new AngularJs).



for Example
------------
DropDownList1 , if user select the item from this, it should be saved in DB as first item,

if he/she wants to add more items from list, it will also should be added.


Clearly, number of times to click = total number of items should be saved in db..


hope you understand.


please help me to complete this.