Question

我试图在Rails应用程序中从AJAX和jQuery开始，并且在之后 jQuery方法中堆满了我。

当我单击它时，我希望“新帖子”链接消失，并在单击“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Post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，我注意到隐藏方法中没有 正常工作

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

我在做什么错了？

Answer 1

由于您仅尝试在索引页面上显示新帖子的表单，所以我建议您在索引页面上显示部分内容，例如：

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

在索引操作中添加：

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

在您的js文件上：

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

为什么after方法在jQuery中不起作用？

1 个答案: