I am getting a NoMethodError for undefined method `votes_against' while trying to display the vote count in my show view. I have implemented the acts_as_votable gem however, I am having some difficulty getting the votes to be displayed. Meaning if a user clicks thumbs_up you see a figure of 1, if another user clicks the image thumbs_up the figure increases to 2.
Specifically the error arises for line: <%= @post.votes_against %> within my show.html page.
Thank you in advance.
Post Rb
class Post < ActiveRecord::Base
belongs_to :user
has_attached_file :image, :styles => { :medium => "300x300>", :thumb => "100x100>" }
validates_attachment_content_type :image, :content_type => ["image/jpg", "image/jpeg", "image/png"]
validates :description, presence: true
validates :image, presence: true
scope :subscribed, ->(following) { where user_id: following }
acts_as_votable
# Returns posts from the users being followed by the given user.
def self.from_users_followed_by(user)
followed_user_ids = user.followed_user_ids
where("user_id IN (:followed_user_ids) OR user_id = :user_id",
followed_user_ids: followed_user_ids, user_id: user)
end
end
User Rb
class User < ActiveRecord::Base
# Include default devise modules. Others available are:
# :confirmable, :lockable, :timeoutable and :omniauthable
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable
has_many :posts, dependent: :destroy
has_many :relationships, foreign_key: "follower_id", dependent: :destroy
has_many :followed_users, through: :relationships, source: :followed
has_many :reverse_relationships, foreign_key: "followed_id",
class_name: "Relationship",
dependent: :destroy
has_many :followers, through: :reverse_relationships, source: :follower
has_many :following, :through => :relationships, :source => :followed
has_many :subscribed, class_name: "Relationship", foreign_key: "follower_id"
validates :name, presence: true
acts_as_voter
has_one :profile
belongs_to :user
has_attached_file :avatar, :styles => { :medium => "300x300>", :thumb => "150x150>" }, :default_url => "/assets/avatar.png"
validates_attachment_content_type :avatar, :content_type => /\Aimage\/.*\Z/
def feed
Post.from_users_followed_by(self)
end
def following?(other_user)
relationships.find_by(followed_id: other_user.id)
end
def follow!(other_user)
relationships.create!(followed_id: other_user.id)
end
def unfollow!(other_user)
relationships.find_by(followed_id: other_user.id).destroy
end
end
Post Controller
class PostsController < ApplicationController
before_action :set_post, only: [:show, :edit, :update, :destroy]
before_action :correct_user, only: [:edit, :update, :destroy]
before_action :authenticate_user!, except: [:index, :show]
def index
@posts = Post.all.order("created_at DESC").paginate(:page => params[:page], :per_page => 40)
end
def show
end
def new
@post = current_user.posts.build
end
def edit
end
def create
@post = current_user.posts.build(post_params)
respond_to do |format|
if @post.save
format.html { redirect_to @post, notice: 'Post was successfully created.' }
format.json { render action: 'show', status: :created, location: @post }
else
format.html { render action: 'new' }
format.json { render json: @post.errors, status: :unprocessable_entity }
end
end
end
def update
respond_to do |format|
if @post.update(post_params)
format.html { redirect_to @post, notice: 'Post was successfully updated.' }
format.json { head :no_content }
else
format.html { render action: 'edit' }
format.json { render json: @post.errors, status: :unprocessable_entity }
end
end
end
def destroy
@post.destroy
respond_to do |format|
format.html { redirect_to posts_url }
format.json { head :no_content }
end
end
def vote_for
@post = Post.find(params[:id])
current_user.vote_for(@post)
respond_to do |format|
format.js
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_post
@post = Post.find(params[:id])
end
def correct_user
@post = current_user.posts.find_by(id: params[:id])
redirect_to posts_path, notice: "Not authorized to edit this post" if @post.nil?
end
# Never trust parameters from the scary internet, only allow the white list through.
def post_params
params.require(:post).permit(:description, :image)
end
end
Routes
devise_for :admins
devise_for :users
resources :posts
resources :users do
member do
get :following
get :followers
end
end
resources :relationships, only: [:create, :destroy]
resources :user_friendships do
member do
put :accept
end
end
resources :posts do
member do
post :vote_for
post :vote_against
end
end
Show.html.erb
<div class="row">
<div class="col-md-offset-4 col-med-8">
<div class="panel panel-default">
<div class="panel-heading center">
<% if @post.image.url %>
<%= image_tag @post.image.url(:medium) %>
<% elsif @post.video.url %>
<%= video_tag @post.video.url(:medium), controls: true, type: "video/mp4" %>
<% end %>
<p>
<strong>Votes For:</strong>
<%= @post.votes_for %>
</p>
<%=link_to image_tag('thumbs_up', :border => 0), vote_for_post_path(@post) %>
<%=link_to image_tag('thumbs_down', :border => 0), vote_against_post_path(@post) %>
</div>
<div class="panel-body">
<p><%= @post.description %></p>
<% user = @post.user %>
<p><strong><%= link_to(user.name, user_path(user)) if @post.user %></strong></p>
<% if @post.user == current_user %>
<%= link_to edit_post_path(@post) do %>
<span class="glyphicon glyphicon-edit"></span>
Edit
<% end %>
<% end %>
<%= link_to 'Back', posts_path %>
</div>
</div>
As i mentioned in my comment you are getting this error because there is no method "votes_against". If you look at acts_as_votables repo, you have "get_likes" and "get_upvotes" methods to get your up votes and "get_dislikes" and "get_downvotes" methods for getting down votes
# tally them up!
@post.votes_for.size # => 5
@post.get_likes.size # => 3
@post.get_upvotes.size # => 3
@post.get_dislikes.size # => 2
@post.get_downvotes.size # => 2
How can I get the vote count to be displayed? Do I need to add get_upvotes and .get_downvotes into my controller?
No you don't need to define these methods as acts_as_votable gem already does this for you. To show upvote and downvote count you can do:
<p>
<strong>Votes For:</strong>
<%= @post.get_likes.size%>
</p>
<p>
<strong>Votes Against:</strong>
<%= @post.get_dislikes.size%>
</p>