【Ruby on Rails 】act as votableの使い方

Act_as_votable.rb

#設定

- user has posts
- user has comments

#やりたいこと
- Likeしてみる
- Likeを取り消す
- Likeの数を調べる
- likeしたものを一覧できるページを作成する
- LikeしてたらLike取り消し、LikeしてなかったらLikeを表示
- Like済みは色が塗られていて、Likeされていない場合は色が塗られていない(font-awesomeで実装)

#posts_controller.rb

 def upvote
    @post = Post.find(params[:id])
    @post.liked_by current_user
    redirect_to @post
 end
    
    def downvote
      @post = Post.find(params[:id])
      @post.unliked_by current_user
      redirect_to @post
    end

# post.rb 

class Post < ActiveRecord::Base
    acts_as_votable
    belongs_to :user
    has_many :comments
end

# config/routes.rb

resources :posts do
  member do
    put "like", to: "posts#upvote"
    put "dislike", to: "posts#downvote"
  end
end

#show.html.erb

<div>お気に入り数(<%= @posts.votes_for.size %>) </div> #likeの数を取り出す
<%= link_to "お気に入り", like_post_path(@posts), method: :put %>　#likeしてみる
<%= link_to "取り消す", dislike_post_path(@posts), method: :put %> #likeを取り消す

(2) 自分のlikeしたページの一覧を表現
 
 #posts_controller.rb
 
 def like
    @posts = current_user.votes.up.for_type(User).votables
 end
 
 #routes.rb
 
  resources :posts do
  member do
    get 'like', to: "posts#like"
  end
 end

 #posts/like.html.erb

<%= @posts.each do |post| %>
<%= %>
<% end %>

#いいね数をカウントする
<%= post.votes_for.size %>

#いいねしてたらいいねを表示、いいねしてなかったらいいねを表示

 <% unless current_user.voted_for? comment %>
   <%= link_to "お気に入り", like_comment_path(comment), method: :put %>(<%= comment.votes_for.size %>) 
 <% else %>
   <%= link_to "取り消す", dislike_comment_path(comment), method: :put %>
 <% end %>

#likeボタンの実装
    
<% unless current_user.voted_for? comment %>
　<%= link_to like_comment_path(comment), method: :put do%><i class="fa fa-star-o colored-star" aria-hidden="true"></i><% end %> <%= comment.votes_for.size %>
<% else %>
  <%= link_to dislike_comment_path(comment), method: :put do%><i class="fa fa-star uncolored-star" aria-hidden="true"></i><%end%> <%= comment.votes_for.size %>
<% end %>
    
    
 #参考URL
http://stackoverflow.com/questions/15012276/acts-as-votable-thumbs-up-down-buttons
http://stackoverflow.com/questions/22949440/act-as-votable-list-who-voted