【问题标题】:Why does after method not working in jQuery?为什么after方法在jQuery中不起作用?
【发布时间】:2019-05-22 10:51:54
【问题描述】:

我正在尝试在我的 Rails 应用程序中使用 AJAX 和 jQuery,并且我使用了 after jQuery 方法。

当我点击新帖子链接时,我希望它消失,并在点击新帖子按钮后形成部分显示:

# here's the link from index.html.erb
<%= link_to 'New Post', new_post_path, id: 'new-post', remote: true %>

和后控制器

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

  # 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 }
        format.js
      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 }
      format.js
    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(:subject, :descripion)
    end
end

和 new.js.erb

$('#new-post').hide().after('<%= j render partial: 'posts/form' %>');

我安装了 jQuery gem 并将其包含在 application.js 中,我注意到 hide 方法没有 after 正常工作

//= require rails-ujs
//= require jquery
//= require jquery_ujs
//= require activestorage
//= require turbolinks
//= require_tree .

我做错了什么?

【问题讨论】:

  • 您是否要在索引页面上显示帖子表单?
  • 我正在尝试在索引页面上显示新帖子的表单

标签: javascript jquery ruby-on-rails


【解决方案1】:

由于您只是尝试在索引页面上显示新帖子的表单,我建议您在索引页面上呈现部分内容,例如:

<button type="button" class="post-btn">New Post</button>
<div class="new_post">
  <%= render partial: 'posts/form', locals: {post: @post} %>
</div>

在您的索引操作中添加:

def index
  ...
  @post = Post.new
end

在你的 js 文件上:

$('.new_post').hide();
$('.post-btn').on('click', function(){
  $(this).hide();
  $('.new_post').show();
});

【讨论】:

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