Faraday :: ConnectionFailed，Connection refused - connect（2）for“localhost”port 9200 Error Ruby on Rails

问题描述

我正在使用Ruby on Rails在我的应用程序中添加Searchkick宝石，但是当我在搜索框中输入一个字词时，我的应用程序就会收到这个错误。我已经根据需要安装了elasticsearch和最新版本的java，但是错误是一样的。这是我收到的错误：

这是我的代码：

终端显示弹性搜索已安装：

终端

 警告：elasticsearch-1.7.3已安装
  

posts_controller.rb

  class PostsController< ApplicationController 
 before_action：set_post，only：[：show，：edit，，update，，destroy] 
 
 
 def search 
如果params [：search] ？ 
 @posts = Post.search（params [：search]）
 else 
 @posts = Post.all 
 end 
 end 
＃GET / posts 
＃GET /posts.json 
 def index 
 @posts = Post.all 
 end 
 
＃GET / posts / 1 
＃ GET /posts/1.json 
 def show 
 end 
 
＃GET / posts / new 
 def new 
 @post = Post.new 
 end 
 
＃GET / posts / 1 / edit 
 def edit 
 end 
 
＃POST / posts 
＃POST / posts .json 
 def create 
 @post = Post.new（post_params）
 
 respond_to do | format | 
 if @ post.save 
 format.html {redirect_to @post，notice：'Post was successfully created。'
 format.json {render：show，status：：created，location： @post} 
 else 
 format.html {render：new} 
 format.json {render json：@ post.errors，status：：unprocessable_entity} 
 end 
 end 
 end 
 
＃PATCH / PUT / posts / 1 
＃PATCH / PUT /posts/1.json 
 def update 
 respond_to do | format | 
 if @ post.update（post_params）
 format.html {redirect_to @post，notice：'Post was successfully updated。'} 
 format.json {render：show，status：：ok ，位置：@post} 
 else 
 format.html {render：edit} 
 format.json {render json：@ post.errors，status：：unprocessable_entity} 
 end 
 end 
 end 
 
＃DELETE / posts / 1 
＃DELETE /posts/1.json 
 def destroy 
 @ post.destroy 
 respond_to do | format | 
 format.html {redirect_to posts_url，notice：'Post was successfully sold。'} 
 format.json {head：no_content} 
 end 
 end 
 
 private 
＃使用回调来共享动作之间的共同设置或约束。 
 def set_post 
 @post = Post.find（params [：id]）
 end 
 
＃永远不要从可怕的互联网信任参数，只允许白名单通过。 
 def post_params 
 params.require（：post）.permit（：name）
 end 
 end 
  

model / post.rb

  < ActiveRecord :: Base 
 searchkick 
 end 
  

views / post / index.html.erb

 < p id =notice><％= notice％> ;< / p为H. 
 
<％= form_tag search_posts_path，方法：：get，class：navbar-form navbar-right，role：searchdo％> 
< p> 
<％= text_field_tag：search，params [：search]，class：form-control％> 
<％= submit_tagSearch，name：nil，class：btn btn-default％> 
< / p> 
<％end％> 
 
< h1>上市讯息< / h1> 
 
< table> 
< thead> 
< tr> 
< th> Name< / th> 
< th colspan =3>< / th> 
< / tr> 
< / thead> 
 
< tbody> 
<％@ posts.each do | post | ％GT; 
< tr> 
< td><％= post.name％>< / td> 
< td><％= link_to'显示'，post％>< / td> 
< td><％= link_to'Edit'，edit_post_path（post）％>< / td> 
< td><％= link_to'Destroy'，post，method：：delete，data：{confirm：'你确定吗？'}％>< / td> 
< / tr> 
<％end％> 
< / tbody> 
< / table> 
 
< br> 
 
<％= link_to'New Post'，new_post_path％> 
  

views / search.html.erb

 < table> 
< thead> 
< tr> 
< th>搜索结果< / th> 
< th colspan =3>< / th> 
< / tr> 
< / thead> 
 
< tbody> 
<％@ posts.each do | post | ％GT; 
< tr> 
< td><％= post.name％>< / td> 
< td><％= link_to'显示'，post％>< / td> 
< td><％= link_to'Edit'，edit_post_path（post）％>< / td> 
< td><％= link_to'Destroy'，post，method：：delete，data：{confirm：'你确定吗？'}％>< / td> 
< / tr> 
<％end％> 
< / tbody> 
< / table> 
  

config / routes.rb

  Rails.application.routes.draw do 
资源：帖子做
收集do 
获取'搜索'
结束
 end 
 end 
  

这是我遇到错误显示的屏幕：

解决方案

连接（2）为localhost端口9200

看起来你的弹性搜索服务没有运行。您必须确保它正在运行。

要查看您的弹性搜索服务是否正在运行，请运行：

  curl localhost：9200 
  

如果它正在运行，那么它应该返回这样的哈希：

  {
status：200，
name：Buzz ，
cluster_name：your_cluster_name，
version：{
number：1.4.5，
build_hash：... ，
build_timestamp：2015-04-27T08：06：06Z，
build_snapshot：false，
lucene_version：4.10.4
} 
tagline：你知道，搜索
} 
  

如果弹性搜索没有运行，这最有可能是您的情况，请使用以下命令启动：

  sudo service elasticsearch start 
  

这应该可以解决你的问题。

I am trying to add Searchkick gem in my app with Ruby on Rails but when i type a word in my search box i get this error in my app. I have installed elasticsearch and the latest version of java as required but still the error is the same. This is the error i am getting :

Here's my code:

The Terminal shows that elastic search is installed:

Terminal

Warning: elasticsearch-1.7.3 already installed

posts_controller.rb

class PostsController < ApplicationController
  before_action :set_post, only: [:show, :edit, :update, :destroy]


def search
  if params[:search].present?
    @posts = Post.search(params[:search])
  else
    @posts = Post.all
  end
end
  # GET /posts
  # GET /posts.json
  def index
    @posts = Post.all
  end

  # GET /posts/1
  # GET /posts/1.json
  def show
  end

  # GET /posts/new
  def new
    @post = Post.new
  end

  # GET /posts/1/edit
  def edit
  end

  # POST /posts
  # POST /posts.json
  def create
    @post = Post.new(post_params)

    respond_to do |format|
      if @post.save
        format.html { redirect_to @post, notice: 'Post was successfully created.' }
        format.json { render :show, status: :created, location: @post }
      else
        format.html { render :new }
        format.json { render json: @post.errors, status: :unprocessable_entity }
      end
    end
  end

  # PATCH/PUT /posts/1
  # PATCH/PUT /posts/1.json
  def update
    respond_to do |format|
      if @post.update(post_params)
        format.html { redirect_to @post, notice: 'Post was successfully updated.' }
        format.json { render :show, status: :ok, location: @post }
      else
        format.html { render :edit }
        format.json { render json: @post.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /posts/1
  # DELETE /posts/1.json
  def destroy
    @post.destroy
    respond_to do |format|
      format.html { redirect_to posts_url, notice: 'Post was successfully destroyed.' }
      format.json { head :no_content }
    end
  end

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_post
      @post = Post.find(params[:id])
    end

    # Never trust parameters from the scary internet, only allow the white list through.
    def post_params
      params.require(:post).permit(:name)
    end
end

model/post.rb

class Post < ActiveRecord::Base
  searchkick
end

views/post/index.html.erb

<p id="notice"><%= notice %></p>

<%= form_tag search_posts_path, method: :get, class: "navbar-form navbar-right", role: "search" do %>
        <p>
          <%= text_field_tag :search, params[:search], class: "form-control" %>
          <%= submit_tag "Search", name: nil, class: "btn btn-default" %>
        </p>
      <% end %>

<h1>Listing Posts</h1>

<table>
  <thead>
    <tr>
      <th>Name</th>
      <th colspan="3"></th>
    </tr>
  </thead>

  <tbody>
    <% @posts.each do |post| %>
      <tr>
        <td><%= post.name %></td>
        <td><%= link_to 'Show', post %></td>
        <td><%= link_to 'Edit', edit_post_path(post) %></td>
        <td><%= link_to 'Destroy', post, method: :delete, data: { confirm: 'Are you sure?' } %></td>
      </tr>
    <% end %>
  </tbody>
</table>

<br>

<%= link_to 'New Post', new_post_path %>

views/search.html.erb

<table>
  <thead>
    <tr>
      <th>Search Result</th>
      <th colspan="3"></th>
    </tr>
  </thead>

  <tbody>
    <% @posts.each do |post| %>
      <tr>
        <td><%= post.name %></td>
        <td><%= link_to 'Show', post %></td>
        <td><%= link_to 'Edit', edit_post_path(post) %></td>
        <td><%= link_to 'Destroy', post, method: :delete, data: { confirm: 'Are you sure?' } %></td>
      </tr>
    <% end %>
  </tbody>
</table>

config/routes.rb

Rails.application.routes.draw do
  resources :posts do
  collection do
    get 'search'
  end
end
end

This is the screen i am getting with the error shown :

解决方案

Connection refused - connect(2) for "localhost" port 9200

Looks like your elastic search service is not running. You have to make sure it's running.

To see if your elastic search service is running, run:

curl localhost:9200

If it's running, then it should return a hash like this:

{
  "status" : 200,
  "name" : "Buzz",
  "cluster_name" : "your_cluster_name",
  "version" : {
    "number" : "1.4.5",
    "build_hash" : "...",
    "build_timestamp" : "2015-04-27T08:06:06Z",
    "build_snapshot" : false,
    "lucene_version" : "4.10.4"
  },
  "tagline" : "You Know, for Search"
}

If elastic search is not running which is most likely the case for you, start it using this command:

sudo service elasticsearch start

That should fix your problem.

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