ruby-on-rails – 同时选择多个方面或过滤数据

我设法建立了一个搜索和一个侧栏,用于使用Sunspot过滤搜索结果,并使用Rails进行行为标记.我正在学习本教程here
但我仍然无法立即选择多重过滤器.当我选择过滤器时,其他子类别名称仍然会消失.我错过了什么？

我原来的问题是这样的：

I’m not quite sure how to select multiple facets at once filtering the
data. So I have multiple sub categories i.e.(hiking,skiing,climbing,
etc.) I want to be able to select hiking and climbing simultaneously
so the data shown is only those objects of hiking and climbing. Right
now I select one (let’s say hiking) and all the other options
disappear. Can someone explain?

以下是我的代码：

齿轮控制器

def index
    @search = Gear.solr_search do
        exclusions = []
        fulltext params[:search]
        exclusions << with(:sub_category_name,params[:name]) if params[:name].present?
        exclusions.compact!
        exclusions = nil if exclusions.empty?
        facet :sub_category_name
        facet :sub_category_name,:exclude => exclusions,:name => :all_categories
        paginate(page: params[:page],:per_page => 15)
    end

    @gears = @search.results
  end

**齿轮指数查看**

<div class="gears_container">
    <div class="side_bar_search">
        <%= form_tag gears_path,:method => :get do %>
          <p>
            <%= text_field_tag :keywords,params[:keywords],class: 'gearsearchbar' %> <%= submit_tag "Search",:name => nil,class: 'btn btn-inverse gearsearchbutton'  %>

         </p>
        <% end %>

    <div class="sidebar_section">Sub Category</div>
    <ul>
    <% for row in @search.facet(:all_categories).rows %>
      <li class="sidebar_options">
        <% if params[:name].present? %>
          <strong><%= row.value %></strong>(<%= link_to "remove",:name => nil %>)
        <% else %>
          <%= link_to row.value,:name => row.value %> (<%= row.count %>)
        <% end %>
      </li>
    <% end %>
    </ul>
</div>
<div c
    <div class="search_results_gear">   
        <% @hits.each do |gear| %>
            <%= render partial: 'gear',locals: {gear: gear} %>
        <% end %>
        <div style="clear:both"></div>
     <%= will_paginate @hits,class: 'flickr_pagination' %>
         </br>
    </div>
</div>

齿轮模型

class Gear < ActiveRecord::Base
  attr_accessible :title,:size,:price,:sub_category_id,:user_id,:image,:image_a,:remote_image_url,:color,:year,:latefee,:cancellation,:minrental,:policy,:about,:address,:city,:state,:zip,:sub_category_name
  belongs_to :user
  belongs_to :sub_category
  has_one :category,:through => :sub_category
  has_many :comments,:dependent => :destroy 
  has_many :line_items
  require 'carrierwave/orm/activerecord'
  mount_uploader :image,GearpicUploader
  mount_uploader :image_a,GearpicUploader
  before_destroy :ensure_not_referenced_by_any_line_item
  acts_as_taggable_on :tags

  validates :title,presence: true
  validates :size,presence: true
  validates :price,presence: true
  validates :sub_category_id,presence: true
  validates :user_id,presence: true

  searchable do
     text :title,:color

     text :user_firstname do
          user.firstname
     end

     text :user_lastname do
          user.lastname
     end
     # **Facet Section**   

     string :size,:color 

     string :sub_category_name,:multiple => true,:stored => true do
       sub_category.name
     end

     string :category_name do
       category.name
     end
   end

   private
   def ensure_not_referenced_by_any_line_item
     if line_items.empty?
      return true
      else
      errors.add(:base,'Line Items present')
      return false
     end
   end

end