1

所以，我无法让 Thumbs Up gem 正常工作。

当我单击向上箭头向上或向下投票时，我似乎在 rails 日志中收到以下消息：

错误日志：

I, [2013-07-24T19:49:39.719359 #13941]  INFO -- : Started PUT "/songs//vote_for" for 127.0.0.1 at 2013-07-24 19:49:39 -0400
I, [2013-07-24T19:49:39.719444 #13941]  INFO -- : Started PUT "/songs//vote_for" for 127.0.0.1 at 2013-07-24 19:49:39 -0400
F, [2013-07-24T19:49:39.729009 #13941] FATAL -- : 
ActiveRecord::RecordNotFound (Couldn't find Song with id=vote_for):
  app/controllers/songs_controller.rb:87:in `set_song'

index.html.erb

<div id="layout1">

<h3>Songs</h3>

<ol>
<% @songs.each do |song| %>
 <li><%= link_to song.title, song %><br></li>

<%=link_to  '&#9650'.html_safe, vote_for_song_path(@song), :remote => true, :method => :put %> 
 <%=link_to '&#9660'.html_safe, vote_against_song_path(@song), :remote => true, :method => :put %> |

    Submitted <%= time_ago_in_words(song.created_at) + " ago" %>
    <span class="comments"> | <%= pluralize(song.comments.size, 'comment') %></span> | <span class="votes"><%= pluralize(song.votes.count, 'vote') %></span><br />



<%#= link_to 'Show', song, class: "button small secondary" %>
<%= link_to('Edit', edit_song_path(song), class: "button small secondary") if can? :update, @song %>
<%= link_to('Destroy', song, method: :delete, data: {confirm: 'Are you sure?'}, class: "button small secondary") if can? :destroy, @song %>


<% end %>

</ol>
</div>


<br />
</div>

song_controller.rb

class SongsController < ApplicationController
  before_filter :authenticate_user!, only: [:create ,:edit, :update, :destroy, :vote_for_song]
  before_action :set_song, only: [:show, :edit, :update, :destroy, :vote_for_song]


  def vote_for_song
      @song = Song.find(params[:id])
      current_user.vote_for(@song)
      respond_to do |format|
        format.js { render 'update_votes' }
      end
  end

  def vote_against_song
    @song = Song.find(params[:id])
    current_user.vote_against(@song)
    respond_to do |format|
      format.js { render 'update_votes' }
    end
  end


  # GET /Songs
  # GET /Songs.json
  def index
    @songs = Song.all
  end

  # GET /Songs/1
  # GET /Songs/1.json
  def show
   @comment = Comment.new(song: @song)
  end

  # GET /Songs/new
  def new
    @song = Song.new
  end

  # GET /Songs/1/edit
  def edit
  end

  # POST /Songs
  # POST /Songs.json
  def create
    @song = Song.new(song_params)

    respond_to do |format|
      if @song.save
        format.html { redirect_to @song, notice: 'Song was successfully created.' }
        format.json { render action: 'show', status: :created, location: @song }
      else
        format.html { render action: 'new' }
        format.json { render json: @song.errors, status: :unprocessable_entity }
      end
    end
  end

  # PATCH/PUT /Songs/1
  # PATCH/PUT /Songs/1.json
  def update
    respond_to do |format|
      if @song.update(song_params)
        format.html { redirect_to @song, notice: 'Song was successfully updated.' }
        format.json { head :no_content }
      else
        format.html { render action: 'edit' }
        format.json { render json: @song.errors, status: :unprocessable_entity }
      end
    end
  end

  # Song /Songs/1
  # Song /Songs/1.json
  def destroy
    @song.destroy
    respond_to do |format|
      format.html { redirect_to songs_url }
      format.json { head :no_content }
    end
  end

  private

    def set_song
       @song = Song.find(params[:id])
     end

     def song_params
       params.require(:song).permit(:title, :artist, :bio, :track, :user_id)
     end
  end

歌曲.rb

class Song < ActiveRecord::Base

  acts_as_voteable

  belongs_to :user
  has_many :comments, :dependent => :destroy


has_attached_file :track,
                  :url  => "/assets/songs/:id/:style/:basename.:extension",
                  :path => ":rails_root/public/assets/songs/:id/:style/:basename.:extension"


  validates_attachment :track, :presence => true

  validates :title, length: { minimum: 10 }
  validates :bio, length: { maximum: 300 }



end

用户.rb

class User < ActiveRecord::Base
  # Include default devise modules. Others available are:
  # :token_authenticatable, :confirmable,
  # :lockable, :timeoutable and :omniauthable
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :validatable

  has_many :songs
  has_many :comments

  acts_as_voter

end

投票.rb

class Vote < ActiveRecord::Base

  scope :for_voter, lambda { |*args| where(["voter_id = ? AND voter_type = ?", args.first.id, args.first.class.base_class.name]) }
  scope :for_voteable, lambda { |*args| where(["voteable_id = ? AND voteable_type = ?", args.first.id, args.first.class.base_class.name]) }
  scope :recent, lambda { |*args| where(["created_at > ?", (args.first || 2.weeks.ago)]) }
  scope :descending, lambda { order("created_at DESC") }

  belongs_to :voteable, :polymorphic => true
  belongs_to :voter, :polymorphic => true

  attr_accessible :vote, :voter, :voteable if ActiveRecord::VERSION::MAJOR < 4


  # Comment out the line below to allow multiple votes per user.
  validates_uniqueness_of :voteable_id, :scope => [:voteable_type, :voter_type, :voter_id]

end

路线.rb

Leap2::Application.routes.draw do

  resources :comments

  devise_for :users, controllers: {registrations: 'registrations'}
  resources :songs do
    member do
      put :vote_for, :vote_against
    end
  end


  get '/contact', to: 'songs#contact'
  get '/faq', to: 'songs#faq'

  root to: 'songs#index'
4

1 回答 1

1

在这两行中index.html.erb，替换@song为song它应该可以工作：

<%=link_to  '&#9650'.html_safe, vote_for_song_path(@song), :remote => true, :method => :put %> 
 <%=link_to '&#9660'.html_safe, vote_against_song_path(@song), :remote => true, :method => :put %> |

这两行也一样：

<%= link_to('Edit', edit_song_path(song), class: "button small secondary") if can? :update, @song %>
<%= link_to('Destroy', song, method: :delete, data: {confirm: 'Are you sure?'}, class: "button small secondary") if can? :destroy, @song %>
于 2013-07-25T00:18:42.540 回答