如何在侧边栏中停止双重渲染？

Question

代码是双重渲染，如下所示：

什么时候应该只列出一次：

Ran 1 miles Apr 
Journal 1 days Apr

视图/布局/ _stats.html.erb

<% @averaged_quantifieds.each do |averaged| %>
<% averaged.results.each do |result| %>
  <div class="<%= result.good? ? 'green' : 'red' %>">
    <li>
      <%= raw averaged.tag_list.map { |t| link_to t.titleize, tag_path(t) }.join(', ') %><%= link_to edit_quantified_path(averaged) do %> <%= averaged.results.first.result_value %> <%= averaged.metric %> <span class="<%= date_value_label_class(result) %>"> <%= averaged.results.first.date_value.strftime("%b") %></span><% end %>
    </li>
  </div>
<% end %>
<% end %>

application_controller

def set_stats
  @averaged_quantifieds = current_user.quantifieds.averaged if current_user
  @instance_quantifieds = current_user.quantifieds.instance if current_user
end

结果是Quantifieds的nested_attribute。

quantifieds_controller

class QuantifiedsController < ApplicationController
  before_action :set_quantified, only: [:show, :edit, :update, :destroy]
  before_action :logged_in_user, only: [:create, :destroy]

  def index
    if params[:tag]
      @quantifieds = Quantified.tagged_with(params[:tag])
    else
      @quantifieds = Quantified.joins(:results).all
      @averaged_quantifieds = current_user.quantifieds.averaged
      @instance_quantifieds = current_user.quantifieds.instance
    end
  end

  def show
  end

  def new
    @quantified = current_user.quantifieds.build 
  end

  def edit
  end

  def create
    @quantified = current_user.quantifieds.build(quantified_params)
    if @quantified.save
      redirect_to quantifieds_url, notice: 'Quantified was successfully created'
    else
      @feed_items = []
      render 'pages/home'
  end
end

  def update
    if @quantified.update(quantified_params)
      redirect_to quantifieds_url, notice: 'Goal was successfully updated'
    else
      render action: 'edit'
  end
end

  def destroy
    @quantified.destroy
    redirect_to quantifieds_url
  end

  private
    def set_quantified
      @quantified = Quantified.find(params[:id])
    end

    def correct_user
      @quantified = current_user.quantifieds.find_by(id: params[:id])
      redirect_to quantifieds_path, notice: "Not authorized to edit this goal" if @quantified.nil?
    end

    def quantified_params
      params.require(:quantified).permit(:categories, :metric, :date, :comment, :private_submit, :tag_list, results_attributes: [:id, :result_value, :date_value, :good, :_destroy])
    end
end

quantified.rb

    class Quantified < ActiveRecord::Base
        belongs_to :user
        has_many :results #correct
        has_many :comments, as: :commentable
        accepts_nested_attributes_for :results, :reject_if => :all_blank, :allow_destroy => true #correct
        scope :averaged,  -> { where(categories: 'Averaged') }
        scope :instance,  -> { where(categories: 'Instance') }
        scope :private_submit, -> { where(private_submit: true) }
        scope :public_submit, -> { where(private_submit: false) }
        validates :categories, :metric, presence: true
        acts_as_taggable

        CATEGORIES = ['Averaged', 'Instance']
    end

result.rb

    class Result < ActiveRecord::Base
        belongs_to :user
      belongs_to :quantified
        has_many :comments, as: :commentable
      default_scope { order('date_value DESC') }
        scope :good, -> { where(good: true) }
        scope :good_count, -> { good.count }
    end

在尝试为结果引入不同的字体颜色时出现了问题。为了实现这一点，我必须引入导致双重渲染的这两行：<% averaged.results.each do |result| %> <div class="<%= result.good? ? 'green' : 'red' %>">

感谢您的时间和专业知识。

Answer 1

您应该详细了解存储的逻辑和数据。

猜测是@averaged_quantifieds中有两条记录，averaged.results中有三条记录。如果不知道存储的数据，很难确定所需的结果。

请注意，您只在averaged.results.first行显示第一条记录结果（<%= raw ...）

尝试

<% @averaged_quantifieds.each do |averaged| %>

  <div class="<%= averaged.results.first.good? ? 'green' : 'red' %>">
    <li>
      <%= raw averaged.tag_list.map { |t| link_to t.titleize, tag_path(t) }.join(', ') %><%= link_to edit_quantified_path(averaged) do %> <%= averaged.results.first.result_value %> <%= averaged.metric %> <span class="<%= date_value_label_class(result) %>"> <%= averaged.results.first.date_value.strftime("%b") %></span><% end %>
    </li>
  </div>

<% end %>

编辑：我的不好，我错过了隐藏在该行其余部分的一个result对象（<%= date_value_label_class(result) %>）

将result更改为适用的averaged.results.first

<% @averaged_quantifieds.each do |averaged| %>
  <div class="<%= averaged.results.first.good? ? 'green' : 'red' %>">
    <li>
      <%= raw averaged.tag_list.map { |t| link_to t.titleize, tag_path(t) }.join(', ') %><%= link_to edit_quantified_path(averaged) do %> <%= averaged.results.first.result_value %> <%= averaged.metric %> <span class="<%= date_value_label_class(averaged.results.first) %>"> <%= averaged.results.first.date_value.strftime("%b") %></span><% end %>
    </li>
  </div>
<% end %>