"Like" or Rating system

[Viktor]

For the app Im currently playing around with I have a login members etc.
I have a list of messages, beside them I have a "like" button. How do I, by pressing this button send a "current value" + 1 to the database of that message. Basically how do I make a like system? I only want a member to be able to like once. Appreciate all help! Thanks in advance!

[Serhii Kulibaba]

Hello Viktor,

You can add boolean column in Users collection which will store like status (liked/not liked). Allow user press like/dislike button and change this field on click event. Also simultaneously increment amount of likes.

[Viktor]

Thanks! But sorry, Im a beginner. Do you think you could expand a bit? Would really appreciate it!