“Like”, “Dislike” plugin for rails

Question

Is there any \"like\" , \"dislike\" plugin for rails...

I went through rating plugins... but all of them were 5 star rating plugins...

Answer 1

I recommend creating the like and dislike option by taking on the classic vote model functionality.

So you have Vote as a join table between the User and the Votable Item .

A Vote value can work as Vote.value + 1 = Like, Vote.value -1 = Dislike, Vote.value = Neutral/Didn't vote.

Your controller for your votable item can look like this :

def like
  get_vote
  @vote.value += 1 unless @vote.value == 1
  @vote.save
  respond_to do |format|
    format.html
    format.js 
  end
end

def dislike
  get_vote
  @vote.value -= 1 unless @vote.value == -1
  @vote.save
  respond_to do |format|
    format.html
    format.js 
  end
end

private

def get_vote
  current_item = @item.detect{|r| r.id == params[:id].to_i}
  @vote = current_item.votes.find_by_user_id(current_user.id)
  unless @vote
    @vote = Vote.create(:user_id => current_user.id, :value => 0)
    current_item.votes << @vote
  end
end

And for everyone's info, this question didn't deserve to be voted down. Its completely valid.