Javascript 新用户未在Rails中通过Ajax显示

我试图完成Rails中JavaScript的第5部分

我遇到的问题是，在刷新整个页面之前，新用户不会显示在显示页面中。我想我已经正确地复制了所有的代码，但是看不出哪里出了问题

用户\u控制器

class UsersController < ApplicationController
  before_action :set_user, only: [:show, :edit, :update, :destroy]

  def index
    @users = User.all
    @user = User.new
  end
...
  def create
    @user = User.new(user_params)

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

---

你已经创建了js吗？（app/views/users/create.js）@Pablo是的，忘了在post中包含它。您是否检查了浏览器控制台日志以查找javascript错误？啊，看起来我没有正确安装jquery

ReferenceError:$未定义

，那么问题可能是jquery，将此

包含到您的application.hrml.erb文件中，并检查它是否有效。或者使用gem

jqueryrails

<b>Users</b>

<ul id="users">
<%= render @users %>
</ul>

<br>

<%= form_with(model: @user) do |f| %>
  <%= f.label :name %><br>
  <%= f.text_field :name %>
  <%= f.submit %>
<% end %>

$("<%= escape_javascript(render @user) %>").appendTo("#users");

started POST "/users" for 127.0.0.1 at 2018-03-30 17:23:36 +0100
Processing by UsersController#create as JS
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"xMBe+h9zi5rWE8JXltYw1fGwQUP8AL2iWaaaGVqwbPvYavJgv7eQ0J5hwRL9xkb2S0pnose3X6oo+YXywvlcaQ==", "user"=>{"name"=>"Dave"}, "commit"=>"Create User"}
   (0.2ms)  BEGIN
  SQL (0.7ms)  INSERT INTO "users" ("name", "created_at", "updated_at") VALUES ($1, $2, $3) RETURNING "id"  [["name", "Dave"], ["created_at", "2018-03-30 16:23:36.474360"], ["updated_at", "2018-03-30 16:23:36.474360"]]
   (6.3ms)  COMMIT
  Rendering users/create.js.erb
  Rendered users/_user.html.erb (0.3ms)
  Rendered users/create.js.erb (3.7ms)
Completed 200 OK in 28ms (Views: 13.6ms | ActiveRecord: 7.3ms)


Started GET "/users" for 127.0.0.1 at 2018-03-30 17:23:38 +0100
Processing by UsersController#index as HTML
  Rendering users/index.html.erb within layouts/application
  User Load (0.3ms)  SELECT "users".* FROM "users"
  Rendered collection of users/_user.html.erb [3 times] (0.4ms)
  Rendered users/index.html.erb within layouts/application (5.4ms)
Completed 200 OK in 54ms (Views: 49.7ms | ActiveRecord: 0.3ms)