zazaalaza zazaalaza - 7 months ago 22
Ruby Question

How to set up acts_as_votable without devise?

I'm following this post (I'm trying to let people vote without logging in, 1 vote/ip) and when I press the upvote button I'm getting the following error:


NoMethodError in CommentsController#upvote undefined method
`find_or_create_by_ip' for #

Extracted source (around line #7):

5 @comment = Comment.find(params[:id])
6 session[:voting_id] = request.remote_ip
7 voter = Session.find_or_create_by_ip(session[:voting_id])
8 voter.likes @comment
9 flash[:message] = 'Thanks for voting!'
10 respond_to do |format|



I followed everything in the post, I created a Session model and added all the code to my files. Here is my code:

#routes.rb

Rails.application.routes.draw do
resources :posts do
resources :comments do
member do
post :upvote
end
end
end

root "posts#index"
end

#models:

class Post < ActiveRecord::Base
has_many :comments
end

class Comment < ActiveRecord::Base
belongs_to :post
acts_as_votable
end

class Session < ActiveRecord::Base
acts_as_voter
end





#controller:
class CommentsController < ApplicationController
before_action :set_post

def upvote
@comment = Comment.find(params[:id])
session[:voting_id] = request.remote_ip
voter = Session.find_or_create_by_ip(session[:voting_id])
voter.likes @comment
flash[:message] = 'Thanks for voting!'
respond_to do |format|
format.html { redirect_to :back }
format.js
end
end

def create
@comment = @post.comments.create(comment_params)
redirect_to root_path
end

def destroy
@comment = @post.comments.find(params[:id])
if @comment.destroy
flash[:success] = "Comment was deleted."
else
flash[:error] = "Comment could not be deleted."
end
redirect_to root_path
end

private

def set_post
@post = Post.find(params[:post_id])
end

def comment_params
params[:comment].permit(:content)
end
end

Answer

Session.find_or_create_by_ip(session[:voting_id]) is a dynamic attribute finder+builder method provided by Active Record, and it assumes that the sessions table has a column named ip.

Make sure the sessions table has a column named ip.

Also, the preferred rails 4 way of writing the same is:

Session.find_or_create_by(ip: session[:voting_id])