Question

我们如何根据results 索引中的:date_value DESC订购quantifieds？

结果是量化的嵌套属性。

现在订单是根据用户在表单中添加结果的位置，而不管:date_value。

事实证明，这比我猜想的要困难得多。

＆＃13;

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, :result, :date, :tag_list, results_attributes: [:id, :result_value, :date_value, :_destroy])
    end
end

＆＃13;

class Quantified < ActiveRecord::Base
	belongs_to :user
 	has_many :results #correct
	accepts_nested_attributes_for :results, :reject_if => :all_blank, :allow_destroy => true #correct
 	scope :averaged,  -> { where(categories: 'Averaged') }
 	scope :instance,  -> { where(categories: 'Instance') }
 	validates :categories, :metric, presence: true
	acts_as_taggable

	CATEGORIES = ['Averaged', 'Instance']
end

＆＃13;

class Result < ActiveRecord::Base
	belongs_to :user
  belongs_to :quantified
end

＆＃13;

class CreateQuantifieds < ActiveRecord::Migration
  def change
    create_table :quantifieds do |t|
      t.string :categories
      t.string :metric
      t.references :user, index: true

      t.timestamps null: false
    end
    add_foreign_key :quantifieds, :users
    add_index :quantifieds, [:user_id, :created_at]
  end
end

＆＃13;

class CreateResults < ActiveRecord::Migration
  def change
    create_table :results do |t|
      t.string :result_value
      t.date :date_value
      t.integer :quantified_id

      t.timestamps null: false
    end
  end
end

＆＃13;

形式

＆＃13;

<%= javascript_include_tag "quantified.js" %>

<%= simple_form_for(@quantified) do |f| %>
  <%= f.error_notification %>

<div class="america">
<form>
  
  <% Quantified::CATEGORIES.each do |c| %>&nbsp;
    <%= f.radio_button(:categories, c, :class => "date-format-switcher") %>&nbsp;
    <%= label(c, c) %>
  <% end %>
      <br/>
      <br/>
      <div class="form-group">
        <%= f.text_field :tag_list, quantified: @quantified.tag_list.to_s.titleize, class: 'form-control', placeholder: 'Enter Action' %>
      </div>
      <div class="form-group">
        <%= f.text_field :metric,  class: 'form-control', placeholder: 'Enter Metric' %>
      </div>

    <div id="results">
      <%= f.fields_for :results do |result| %>
      <%= render 'result_fields', :f => result %>
      <% end %>
    </div>
    
    <div class="links">
      &nbsp;&nbsp;<b><%= link_to_add_association 'Add Result', f, :results %></b>
    </div>

<div class="america2">
  <%= button_tag(type: 'submit', class: "btn") do %>
  <span class="glyphicon glyphicon-plus"></span>
  <% end %>

  <%= link_to quantifieds_path, class: 'btn' do %>
  <span class="glyphicon glyphicon-chevron-left"></span>
  <% end %>

  <%= link_to @quantified, method: :delete, data: { confirm: 'Are you sure?' }, class: 'btn' do %>
  <span class="glyphicon glyphicon-trash"></span>
  <% end %>
</div>

</form>
</div>
<% end %>

＆＃13;

索引

＆＃13;

<!-- Default bootstrap panel contents -->

<div id="valuations" class="panel panel-default">
  
  <div class="panel-heading"><h4><b>AVERAGE</b></h4></div>

  <% @averaged_quantifieds.each do |averaged| %>
    <div class="attempt">

        <b><%= raw averaged.tag_list.map { |t| link_to t.titleize, tagquantifieds_path(t) }.join(', ') %> 

        <%= link_to edit_quantified_path(averaged) do %>
        (<%= averaged.metric %>)</b>
        <% end %>
        <ul>
          <% averaged.results.each do |result| %>
            <li>
              <b><%= result.result_value %></b>&nbsp;&nbsp;
              <%= result.date_value.strftime("%b %Y") %>
            </li>
          <% end %>
        </ul>
      </div>
  <% end %>
</div>

  <div class="valuations-button">
  <%= link_to new_quantified_path, class: 'btn'  do %>
  <b><span class="glyphicon glyphicon-plus"</span></b>
  <% end %>
  </div>

<br>

<!-- Default bootstrap panel contents -->
<div id="valuations" class="panel panel-default">
  
  <div class="panel-heading"><h4><b>INSTANCE</b></h4></div>

  <% @instance_quantifieds.each do |instance| %>
    <div class="attempt"> 
      <b><%= raw instance.tag_list.map { |t| link_to t.titleize, tagquantifieds_path(t) }.join(', ') %>
      <%= link_to edit_quantified_path(instance) do %>
        (<%= instance.metric %>)</b>
      <% end %>
      <ul>
        <% instance.results.each do |result| %>
        <li>
          <%= result.date_value.strftime("%b.%d.%y") %>
           &nbsp;&nbsp;
          <%= result.result_value %>
        </li>
        <% end %>
      </ul>
    </div>
  <% end %>
</div>

  <div class="valuations-button">
  <%= link_to new_quantified_path, class: 'btn'  do %>
  <b><span class="glyphicon glyphicon-plus"</span></b>
  <% end %>
  </div>

＆＃13;

非常感谢你的时间！

Answer 1

知道了！在 result.rb

中添加default_scope { order('date_value DESC') }

如何根据日期排序嵌套属性？

1 个答案: