未定义的局部变量或方法

Question

我正在尝试将页面从布局呈现到我的电影索引，但问题是当我将代码放入索引时它工作正常但是当我将它移动到布局时，它显示 undefined local variable or method 'movie' 这是我的控制器：

def index
  @movies = Movie.all.order(:cached_votes_score => :desc)
end

def show
end

def new
  @movie = current_user.movies.build
  @movie = Movie.new 
  @categories = Category.all
end
def edit
  @categories = Category.all.map{|c| [ c.name, c.id ] }
end

def create
  @movie = current_user.movies.build(movie_params)
  @movie.category_id = params[:category_id]
  respond_to do |format|
    if @movie.save
      format.html { redirect_to @movie, notice: 'Movie was successfully created.' }
      format.json { render :show, status: :created, location: @movie }
    else
      format.html { render :new }
      format.json { render json: @movie.errors, status: :unprocessable_entity }
    end
 end
end

def update
  @movie.category_id = params[:category_id]
  respond_to do |format|
    if @movie.update(movie_params)
      format.html { redirect_to @movie, notice: 'Movie was successfully updated.' }
      format.json { render :show, status: :ok, location: @movie }
    else
      format.html { render :edit }
      format.json { render json: @movie.errors, status: :unprocessable_entity }
    end
  end
end

 def destroy
   @movie.destroy
   respond_to do |format|
   format.html { redirect_to movies_url, notice: 'Movie was successfully destroyed.' }
   format.json { head :no_content }
  end
 end

def upvote
  @movie.upvote_from current_user, :vote_weight => 3
  redirect_to root_path
end

def downvote
  @movie.downvote_from current_user
  redirect_to root_path
end

这是我的索引页：

<div class= "row">
 <% @movies.each do |movie|%>
  <div class="col-sm-6 col-md-3">
    <div class="thumbnail">
      <%= link_to (image_tag movie.image.url(:medium), class: 'image'), movie %>
      <%= render 'layouts/vote' %> 
    </div>
  </div>

以及我要呈现的页面 layouts/vote:

 <%= link_to like_movie_path(movie), class: "like", method: :put do %>
  <button type= "button" class = "btn btn-info" aria-label= "Left Align">
   <span class= "glyphicon glyphicon-thumbs-up glyphicon-align-center" aria-hidden= "true"></span>
  <span class= "badge"><%= movie.get_upvotes.size%></span>
 </button>
<%end%>
<%= link_to dislike_movie_path(movie), class: "like", method: :put do %>
<button type= "button" class = "btn btn-info" aria-label= "Left Align">
<span class= "glyphicon glyphicon-thumbs-down glyphicon-align-center" aria-hidden= "true"></span>
<span class= "badge"><%= movie.get_downvotes.size%></span>
</button>
<%end%>

所以我得到了一个错误未定义的局部变量或方法`movie' 对于这一行：

<%= link_to like_movie_path(movie), class: "like", method: :put do %>

以及路线：

like_movie PUT    /movies/:id/like(.:format)     movies#upvote
dislike_movie PUT    /movies/:id/dislike(.:format)  movies#downvote

Answer 1

您需要将 movie 对象作为局部变量传递给 partial

<%= render 'layouts/vote', movie: movie %>

未定义的局部变量或方法

undefined local variable or method

variables

methods

ruby-on-rails

render

local