试图在get_vote.size中获得总票数，并为get_vote获得一个未定义的方法

Question

就像我标题里写的一样。我正在使用法案作为可投票的创业板，从我的终端，代码正在记录投票，它被存储在选票表中。当我选择“向上投票”按钮时，当我试图在帖子中对评论进行总结时，它会给出未定义的get_vote的错误。

我试图设置它，以便人们可以向上投票或否决一个评论在一个帖子。

我的路线

Rails.application.routes.draw do
  devise_for :users
  # For details on the DSL available within this file, see 
http://guides.rubyonrails.org/routing.html
  resources :posts do
    resources :comments
      member do
        put "like", to: "comments#upvote"
        put "dislike", to: "comments#downvote"
      end
  end
  root 'posts#index'
end

用户模型

class User < ApplicationRecord
  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable and :omniauthable
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :validatable
  has_many :posts
  has_many :comments, through: :posts
  acts_as_voter
end

注释模型

class Comment < ApplicationRecord
  validates :user_id, presence: true
  belongs_to :user
  belongs_to :post
  acts_as_votable
end

视图

<div class="container">


<p>Title: <%= @post.title %></p></br>
<p>Category: <%= @post.category %></p></br>
<p>Body: <%= @post.body %></p></br>
<p>Date Created: <%= @post.created_at.strftime("%B %d, %Y") %></p></br>

<%= link_to 'Home', root_path %>
<%= link_to 'Edit', edit_post_path(@post) %>
<%= link_to 'Delete', @post, method: :delete, data: {confirm: "Are you sure you want to delete #{@post.title}?"} %>

<% if user_signed_in?  %>
<%= render :partial => "comments/comment" %>
<% else %>
<%= "Please sign up or sign in to leave a comment." %>
<% end %>
</div>

<br />
<div class="container">
  <table class="table table-striped">
    <tbody>
      <% @post.comments.each do |f| %>
      <tr>
        <td><%= link_to like_post_path(@post), class: "like", method: :put do %>
          <i class="fa fa-angle-up"></i>
          <%= @post.get_upvotes.size %>
        <% end %>
        </td>
        <td><%= f.text %></td>
        <td><%= f.try(:user).try(:username) %></td>
        <td><%= f.created_at %></td>
      </tr>
      <% end %>
    </tbody>
  </table>

  </div>

  <div>
    <%=  @comment.try(:user).try(:username) %>
  </div>

我的评论控制器

class CommentsController < ApplicationController
  before_action :upvote

  def create
    @post = Post.find(params[:post_id])
    @comment = @post.comments.new(comment_params)
    @comment.user = current_user
    if @comment.save
      redirect_to @post
    else
      redirect_to @post
    end
  end

  def destroy
    @post = Post.find(params[:id])
    @comment = @post.comments.find(params[:id])
    @comment.destroy
    redirect_to @post
  end

  def upvote
    @post = Post.find(params[:id])
    @comment = @post.comments.find(params[:id])
    @comment.upvote_from current_user
    redirect_to @post
  end

  def downvote
    @post = Post.find(params[:id])
    @comment = @post.comments.find(params[:id])
    @comment.downvote_from current_user
    redirect_to @post
  end

private

  def comment_params
    params.require(:comment).permit(:text, :user_id, :username)
  end

end

，以防万一这是我的路线

 Prefix Verb   URI Pattern                                 Controller#Action
        new_user_session GET    /users/sign_in(.:format)                    devise/sessions#new
            user_session POST   /users/sign_in(.:format)                    devise/sessions#create
    destroy_user_session DELETE /users/sign_out(.:format)                   devise/sessions#destroy
       new_user_password GET    /users/password/new(.:format)               devise/passwords#new
      edit_user_password GET    /users/password/edit(.:format)              devise/passwords#edit
           user_password PATCH  /users/password(.:format)                   devise/passwords#update
                         PUT    /users/password(.:format)                   devise/passwords#update
                         POST   /users/password(.:format)                   devise/passwords#create
cancel_user_registration GET    /users/cancel(.:format)                     devise/registrations#cancel
   new_user_registration GET    /users/sign_up(.:format)                    devise/registrations#new
  edit_user_registration GET    /users/edit(.:format)                       devise/registrations#edit
       user_registration PATCH  /users(.:format)                            devise/registrations#update
                         PUT    /users(.:format)                            devise/registrations#update
                         DELETE /users(.:format)                            devise/registrations#destroy
                         POST   /users(.:format)                            devise/registrations#create
           post_comments GET    /posts/:post_id/comments(.:format)          comments#index
                         POST   /posts/:post_id/comments(.:format)          comments#create
        new_post_comment GET    /posts/:post_id/comments/new(.:format)      comments#new
       edit_post_comment GET    /posts/:post_id/comments/:id/edit(.:format) comments#edit
            post_comment GET    /posts/:post_id/comments/:id(.:format)      comments#show
                         PATCH  /posts/:post_id/comments/:id(.:format)      comments#update
                         PUT    /posts/:post_id/comments/:id(.:format)      comments#update
                         DELETE /posts/:post_id/comments/:id(.:format)      comments#destroy
               like_post PUT    /posts/:id/like(.:format)                   comments#upvote
            dislike_post PUT    /posts/:id/dislike(.:format)                comments#downvote
                   posts GET    /posts(.:format)                            posts#index
                         POST   /posts(.:format)                            posts#create
                new_post GET    /posts/new(.:format)                        posts#new
               edit_post GET    /posts/:id/edit(.:format)                   posts#edit
                    post GET    /posts/:id(.:format)                        posts#show
                         PATCH  /posts/:id(.:format)                        posts#update
                         PUT    /posts/:id(.:format)                        posts#update
                         DELETE /posts/:id(.:format)                        posts#destroy
                    root GET    /                                           posts#index

这就是我要犯的错误

NoMethodError at /post/1未定义方法`get_upvotes‘for #

截图也是错误的

Answer 1

看起来您已经将Comment设置为acts_as_votable，但是您正在对Post的一个实例调用get_upvotes。你包括acts_as_votable到Post了吗？

(而且，您发布的错误消息似乎忽略了接收get_upvotes的一些细节)