试图将部分表单添加到我的索引页面。如何传递多个变量来生成表单？

Question

我有一个艺术索引页，我使用评级模型对其进行了投票。我可以在显示页面上投票，但我希望它也能够在索引页面上投票。评级的形式具有三个变量。 Art Controller 索引页面应该如何显示以及索引 html 页面的代码。我收到 "rating" 未定义的错误。请帮忙，这是我完成这个项目必须克服的最后一个障碍。

**更新：我改变了路线，所以表格现在只有两个变量。但在索引页上呈现表单时仍然遇到问题。

通往新评级的路线

new_art_rating GET /arts/:art_id/ratings/new(.:format)

Routes.rb

resources :campaigns do
    resources :lyrics do
      member do
        get "like", to: "lyrics#upvote"
        get "dislike", to: "lyrics#downvote"
      end

      resources :comments
    end

      resources :arts do
        member do
          get "like", to: "arts#upvote"
          get "dislike", to: "arts#downvote"
        end

        resources :commentarts


      end
  end
resources :arts do
resources :ratings
end

艺术指数

<% @arts.each do |art| %>
    <div class="container-md">
      <%= render partial: 'ratings/form', :locals =>{:campaign => @campaign, :art => @art, :rating => @art.rating} %>
      <%= link_to campaign_art_path(@campaign, art) do %>
        <%= image_tag art.image.url(:small) %>
      <% end %>

艺术总监

    class ArtsController < ApplicationController
    before_action :tag_cloud, :only => [:index]
    load_and_authorize_resource :only => [:show, :edit, :update, :destroy]
    before_action :find_post, only: [:show, :edit, :update, :destroy, :upvote, :downvote]
    before_action :set_campaign
    before_action :authenticate_user!, except: [:index, :show]
    impressionist :actions=>[:show,:index], :unique => [:impressionable_type, :impressionable_id, :session_hash]


    def index
        @arts = Art.all.order("created_at DESC").paginate(:page => params[:page], :per_page => 10)
        @rating = Rating.new

    end

    def show
        @commentarts = Commentart.where(art_id: @art)
        @ratings = Rating.where(art_id: @art)
        @random_art = Art.where.not(id: @art).order("RANDOM()").first
    end

    def new
        @art = Art.new
    end

    def create
        @art = Art.new(post_params)
        @art.user_id = current_user.id
        @art.campaign_id = @campaign.id

        if @art.save
            redirect_to([@art.campaign, @art])
        else
            render 'new'
        end

    end

    def edit
    end

    def update
        if @art.update(post_params)
            redirect_to([@art.campaign, @art])
        else
            render 'edit'
        end

    end

    def destroy
        @art.destroy
        redirect_to root_path
    end

    def upvote
        @art.upvote_by current_user
        redirect_to([@art.campaign, @art])
    end

    def downvote
        @art.downvote_by current_user
        redirect_to([@art.campaign, @art])
    end

    def tagged
        if params[:tag].present? 
            @arts = Art.tagged_with(params[:tag]).order("created_at desc")
        else 
            @arts = Art.all.order("created_at desc")
        end  
    end

    def tag_cloud

         @tags = Art.tag_counts_on(:tags)
    end


    private

    def find_post
        @art = Art.find(params[:id])
    end

    def set_campaign
        @campaign = Campaign.find(params[:campaign_id])
    end

    def post_params
        params.require(:art).permit( :image, :description, :artist, :typeart, :link)
    end


end

评分控制器

    class RatingsController < ApplicationController
    before_action :authenticate_user!

    def create
        @art = Art.find(params[:art_id])
        @rating = Rating.create(params[:rating].permit(:rate))
        @rating.user_id = current_user.id
        @rating.art_id = @art.id

        if @rating.save
            redirect_to([@art.campaign, @art])
        else
            render 'new'
        end
    end
end

表单视图

    <%= simple_form_for([@art, @art.ratings.build]) do |f| %>
  <%= f.error_notification %>
<div class="field">
    <div id="star-rating"></div>
</div>

    <%= f.button :submit, "Rate", class: "button" %>

<% end %>



<script>
$('#star-rating').raty({
    path: '/assets/',
    scoreName: 'rating[rate]'
});
</script>

活动控制器

    class CampaignsController < ApplicationController
        before_action :find_campaign, only: [:show, :edit, :update, :destroy]
        before_action :authenticate_user!, except: [:index, :show]
        has_scope :free
        has_scope :open
        has_scope :closed

    def index
        @campaigns = Campaign.all.order("created_at DESC")
        @free_campaign = Campaign.free.first
        @open_campaigns = Campaign.open.all
        @closed_campaigns = Campaign.closed.all

    end

    def show
        @lyrics = Lyric.where(campaign_id: @campaign.id).order("created_at DESC")
        @arts = Art.where(campaign_id: @campaign.id).order("created_at DESC")
        @time = Time.now 
    end

    def new
        @campaign = current_user.campaigns.build
    end

    def create
        @campaign = current_user.campaigns.build(campaign_params)

        if @campaign.save
            redirect_to @campaign
        else
            render 'new'
        end

    end

    def edit
    end

    def update
        if @campaign.update(campaign_params)
            redirect_to @campaign
        else
            render 'edit'
        end

    end

    def destroy
        @campaign.destroy
        redirect_to root_path
    end


    private

    def find_campaign
        @campaign = Campaign.find(params[:id])
    end

    def campaign_params
        params.require(:campaign).permit(:title, :description, :timer, :timer2, :image, :status)
    end

end

错误消息在 Arts#index 中。未定义的方法评级。我表格的第一行。

Arts 中的 NoMethodError#index nil:NilClass

的未定义方法“评分”

提取的源代码（第 1 行附近）：

**<%= simple_form_for([@art, @art.ratings.build]) do |f| %>**
<%= f.error_notification %>
<div class="field">
<div id="star-rating"></div>

Answer 1

推测 Arts 索引有多个 Art 实例，所以没有 '@art'。

<% @arts.each do |art| %>
  <%= simple_form_for([art, art.ratings.build]) do |f| %>

等或者，如果确实只有一个 Art 显示在 index 上，则在控制器中实例化它。

或许也编辑这一行？我需要查看错误日志以了解您在哪里看到错误。

Rating.create(params[:rating].permit(:rate))

我会把它分解成一个单独的方法：

Rating.create(rating_params[:rate))

def rating_params
  params.require(:rating).permit(:rate)
end

然后我会检查 javascript 'raty' 库实际插入到 DOM 中的内容，以及它是否真的在发送您认为的参数？