Embed message doesn't update

Question

I want to make a vote with an embed message.
When someone adds a reaction, I want to add a like and to show the number of likes in the embed. Here an example:

Answer 1

Very late answer. But just in case someone finds this. Theres a much shorter way.

And more useful if you have large embeds and don't want to rebuild your whole embed:

message.embeds[0].fields[0] = "Some much like";
message.edit(new Discord.RichEmbed(message.embeds[0]));