Rails - 从 Railscast 不显示的简单搜索

Question

我一直在关注 Railscast 教程，了解如何创建一个简单的搜索表单，出于某种奇怪的原因，每当我搜索URL时，服务器日志都会更改，服务器日志显示它搜索帖子，在这种情况下是广告，但它不显示它。

我的广告控制器。

class AdsController < ApplicationController
  before_action :set_ad, only: [:show, :edit, :update, :destroy]

  # GET /ads
  # GET /ads.json
  def index
    @ads = Ad.search(params[:search])
    @ads_small = Ad.where(:size => "small").order('created_at DESC')
    @ads_medium = Ad.where(:size => "medium").order('created_at DESC')
    @ads_featured = Ad.where(:size => "featured").order('created_at DESC')
  end
  # GET /ads/1
  # GET /ads/1.json
  def show
  end
  # GET /ads/new
  def new
    @ad = Ad.new
  end
  # GET /ads/1/edit
  def edit
  end
  # POST /ads
  # POST /ads.json
  def create
    @ad = Ad.new(ad_params)
    @ad.user_id = current_user.id
    respond_to do |format|
      if @ad.save
        format.html { redirect_to @ad, notice: 'Ad was successfully created.' }
        format.json { render action: 'show', status: :created, location: @ad }
      else
        format.html { render action: 'new' }
        format.json { render json: @ad.errors, status: :unprocessable_entity }
      end
    end
  end
  # PATCH/PUT /ads/1
  # PATCH/PUT /ads/1.json
  def update
    respond_to do |format|
      if @ad.update(ad_params)
        format.html { redirect_to @ad, notice: 'Ad was successfully updated.' }
        format.json { head :no_content }
      else
        format.html { render action: 'edit' }
        format.json { render json: @ad.errors, status: :unprocessable_entity }
      end
    end
  end
  # DELETE /ads/1
  # DELETE /ads/1.json
  def destroy
      @ad.destroy
      respond_to do |format|
        format.html { redirect_to ads_url }
        format.json { head :no_content }
      end
  end
  private
    # Use callbacks to share common setup or constraints between actions.
    def set_ad
      @ad = Ad.find(params[:id])
    end
    # Never trust parameters from the scary internet, only allow the white list through.
    def ad_params
      params.require(:ad).permit(:title, :url, :preview, :location, :size, :info, :search)
    end
end

我的广告模型

class Ad < ActiveRecord::Base
    attr_accessible :title, :url, :preview, :size, :location, :info
    belongs_to :user
  has_attached_file :preview, :default_url => "missing.jpg", :styles => { :medium => "125x125^", :featured => "250x250^", :showpg => "400x400^" }, :convert_options => {:medium => "-gravity center -extent 125x125", :featured => "-gravity center -extent 250x250", :showpg => "-gravity center -extent 400x400"}
  validates :title, length: { maximum: 35 }
  validates :url, length: { maximum: 40 }
  def self.search(search)
  if search
    find(:all, :conditions => ['title LIKE ?', "#{search}"])
  else
    find(:all)
  end
end
end

我的广告索引视图

 <%= form_tag ads_path, :method => :get do %>
  <p class="search_f">
    <%= text_field_tag :search, params[:search], :class => "glow_f" %>
    <%= submit_tag "Search", :name => nil, :class => "submit" %>
<% end %>
<% @ads.each do |ad| %>
<% if ad.size == "featured" %>
  <div class="adspace_grid_f">
    <div class="pic_sec_f">
      <%= image_tag ad.preview.url(:featured) %>
    </div>
    <div class="text_info_f">
      <span class="bold"><%= link_to ad.title, ad, :class => "title" %></span></br>
      <p><%= truncate(ad.info, length: 90) %></p>
      <span class="bold"><%= ad.location %></span></br>
      <span class="bold"><%= ad.url %></span>
    </div>
    <% if can? :destroy, ad %>
      <%= link_to 'Delete', ad, :method => :delete, :class => "delete" %> 
    <% end %>
  </div> 
<% end %>
<% if ad.size == "medium" %>
  <div class="adspace_grid">
    <div class="pic_sec">
      <%= image_tag ad.preview.url(:medium) %>
    </div>
    <div class="text_info">
      <span class="bold"><%= link_to ad.title, ad, :class => "title" %></span></br>
      <p><%= truncate(ad.info, length: 60) %></p>
      <span class="bold"><%= ad.location %></span></br>
      <span class="bold"><%= ad.url %></span>
    </div>
    <% if can? :destroy, ad %>
      <%= link_to 'Delete', ad, :method => :delete, :class => "delete" %> 
    <% end %>
  </div> 
<% end %>
<% end %>

任何帮助将不胜感激。

Answer 1

查看符合搜索条件的广告ad.size。 如果大小不是"精选"或"中等"，则您的视图似乎会忽略它，因为唯一的 if 条件是用于 ad.size == "featured" 和 ad.size == "medium" 。

如果要查看搜索找到的内容，请在<% @ads.each do |ad| %>行上方包含以下行：

<% @ads.inspect %>

此外，@ads_small、@ads_medium 和 @ads_featured 似乎没有在任何地方使用。 这些是为了将来的目的吗？