Ruby on rails 使用follow/unfollow按钮对用户分页：Ajax由于类名重复而遇到问题

My users/show.html.erb页面工作正常，因为每个页面上只显示一个类名。当用户在

users/index.html.erb

和

follow/unfollow按钮中分页时，
relationship/js.create.erb
和
relationship/js.destroy.erb
会变得古怪，因为页面上有重复的类名，（无论跟随/取消跟随哪个用户，第一个分页的用户都会更新，这仅在刷新页面时修复自身（实际模型仍能正常工作））

我没有在
users/index.html.erb
中使用unfollow/follow部分，因为index.html.erb中没有
@user
变量，它对@users进行分页，所以我使用
user.id

class RelationshipsController < ApplicationController
before_action :logged_in_user

def create
  @user = User.find(params[:followed_id])
    current_user.follow(@user)
    respond_to do |format|
      format.html { redirect_to @user }
      format.js
    end
  end

  def destroy
    @user = Relationship.find(params[:id]).followed
    current_user.unfollow(@user)
    respond_to do |format|
      format.html { redirect_to @user }
      format.js
    end
  end
end

**relationships/create.js.erb**
$("#follow_form").html("<%= escape_javascript(render('users/unfollow')) %>");
$("#followers").html('<%= @user.followers.count %> <br> followers');

**relationships/destroy.js.erb**
$("#follow_form").html("<%= escape_javascript(render('users/follow')) %>");
$("#followers").html('<%= @user.followers.count %> <br> followers');

**users/index.html.erb** 
<div class="row community">
  <% @users.in_groups_of(3, false).each do |users| %>
    <div class="col-sm-12">
      <% users.each do |user| %>
            <ul class="name-head">
              <% unless current_user == user %>
                <div id="follow_form">
                  <% if current_user.following?(user) %>
                    <%= form_for(current_user.active_relationships.find_by(followed_id: user.id),
                    html: { method: :delete }, remote: true) do |f| %>
                        <%= f.submit "Unfollow", class: "btn btn-primary" %>
                    <% end %>
                  <% else %>
                    <%= form_for(current_user.active_relationships.build, remote: true) do |f| %>
                      <div><%= hidden_field_tag :followed_id, user.id %></div>
                      <%= f.submit "Follow", class: "btn btn-primary" %>
                    <% end %>
                  <% end %>
                </div>
              <% end %>
            </ul>
          <div class="col-xs-12">
          <div class="col-xs-4">
            <a href="<%= following_user_path(user.id) %>">
              <center><strong id="following" class:"stat">
              <%= user.following.count %><br>
              following
              </strong></center>
            </a>  
          </div>
          <div class="col-xs-4">
            <a href="<%= followers_user_path(user.id) %>">
              <center><strong id="followers" class="stat">
                <%= user.followers.count %><br>
                followers
              </strong></center>
            </a>
          </div>
          <div class="col-xs-4">
              <center><strong id="photo-count" class="stat">
                <%= user.photos.count %><br>
              photos shared
              </strong></center>
          </div>
        </div>
        </div>  
      <% end %>
    </div>  
  <% end %>
</div>
<%= will_paginate %>

**users/show.html.erb** 
.
.
.
      <li class="follow">
        <%= render 'follow_form' if logged_in? %>
      </li>
    </ul>
  </div>
  <div class="col-xs-12">
    <div class="col-xs-4">
      <a href="<%= following_user_path(@user) %>">
        <center><strong id="following" class:"stat">
        <%= @user.following.count %><br>
        following
        </strong></center>
      </a>  
    </div>
    <div class="col-xs-4">
      <a href="<%= followers_user_path(@user) %>">
        <center><strong id="followers" class="stat">
          <%= @user.followers.count %><br>
        followers
        </strong></center>
      </a>
    </div>
    <div class="col-xs-4">
        <center><strong id="photo-count" class="stat">
          <%= @user.photos.count %><br>
        photos shared
        </strong></center>
    </div>
end

**_follow_form.html.erb**
<% unless current_user?(@user) %>
  <div id="follow_form">
  <% if current_user.following?(@user) %>
    <%= render 'unfollow' %>
  <% else %>
    <%= render 'follow' %>
  <% end %>
  </div>
<% end %>

**_follow.html.erb**
<%= form_for(current_user.active_relationships.build, remote: true) do |f| %>
  <div><%= hidden_field_tag :followed_id, @user.id %></div>
  <%= f.submit "Follow", class: "btn btn-primary" %>
<% end %>

**_unfollow.html.erb**
<%= form_for(current_user.active_relationships.find_by(followed_id: @user.id),
         html: { method: :delete },
         remote: true) do |f| %>
   <%= f.submit "Unfollow", class: "btn btn-primary" %>
 <% end %>

及

问题在于你的
关系/js.create.erb
和
关系/js.destroy.erb
部分，因为你的代码只更新页面中的第一个
#follow form
div（即你报告的第一个用户的
#follow form
）

您应该将
users\index.html.erb
更改为

<% unless current_user == user %>
  <div id="follow-form-<%= user.id %>">

和
relationship/js.destroy.erb
相应地，那么你应该让一切都按预期工作。
我复制了你的代码，在添加了下面的修改后，它工作得非常好。（也就是说，我不需要重新加载页面来更改“Follow/Unfollow”按钮）

请尝试以下操作以查看其是否有效：


users/index.html.erb（此处仅显示相关代码，即“Follow/”Unfollow“按钮）




用户/_follow_form.html.erb



users/\u unfollow.html.erb



用户/_follow.html.erb



关系/create.js.erb

$（“#follow_form-”）.html（“”）；

关系/destroy.js.erb

$（“#follow_form-”）.html（“”）；

请注意
的使用。可选哈希
局部变量：{……}
允许您将局部变量传递给要渲染的部分（
\u partial.html.erb
），在这种情况下，您还需要在要渲染的部分名称之前添加
partial:

这样，您的
user
局部变量将不仅在
users/index.html.erb
中可用，而且在上面列出的其他文件中也可用。
这不起作用。您只是复制了我上面写的内容，除了添加了一个破折号，这不会改变代码，这与我上面写的内容相同。请例如，请深入查看我的答案：我还将用户id添加到了div id中，这就是您的代码不起作用的原因。请参见问题的部分……”编辑：我考虑将用户id传递到类中，例如：“当您提交“post”/“delete”时，您能提供rails控制台所说的内容吗“通过单击按钮“follow”向关系控制器发出请求”？创建/销毁操作是否作为JS而不是HTML处理？我找到了解决方案。我将在一分钟后发布答案：）谢谢这对index.html.erb有效，但是现在show.html.erb坏了。我刚刚为show.html.erb创建了一个单独的部分“follow”表单“show”。现在一切都正常了。lol现在表单没有在user/show.html.erb模式中呈现，但是模型仍然正常。我猜模式有问题，因为页面上有两美元（“#follow_form-”），一个在模式后面…好的，我解决了这个问题，只需在create/destroy文件中添加另一行代码，该文件包含modal的父元素，因此类似$（“li.follow>#follow_form——
I have tried many combinations such as:

 $("#follow_form<%="#{user.id}"%>").html("<%= escape_javascript(render('users/unfollow')) %>");

 $("#follow_form<%= @user.id%>").html("<%= escape_javascript(render('users/unfollow')) %>"); 

Started DELETE "/relationships/360" for 184.90.97.154 at 2016-05-13 20:05:17 +0000
Processing by RelationshipsController#destroy as JS
Rendered users/_follow.html.erb (1.6ms)
 (1.1ms)[0m  [1mSELECT COUNT(*) FROM "users" INNER JOIN "relationships" ON "users"."id" = "relationships"."follower_id" WHERE "relationships"."followed_id" = $1[0m  [["followed_id", 1]]

Started POST "/relationships" for 184.90.97.154 at 2016-05-13 20:07:26 +0000
Processing by RelationshipsController#create as JS
[1m[36m (1.5ms)[0m  [1mCOMMIT[0m

<% unless current_user == user %>
  <div id="follow-form-<%= user.id %>">

$("#follow-form-<%= @user.id %>").html("<%= escape_javascript(render('users/unfollow')) %>");
$("#followers").html('<%= @user.followers.count %> <br> followers');

<ul class="name-head">
  <% unless current_user == user %>
     <%= render partial: 'follow_form', locals: { user: user } %>
  <% end %>
</ul>

<div id="follow_form-<%= user.id %>">
  <% if current_user.following?(user) %>
    <%= render partial: 'unfollow', locals: { user: user } %>
  <% else %>
   <%= render partial: 'follow', locals: { user: user } %>
  <% end %>
</div>

<%= form_for(current_user.active_relationships.find_by(followed_id: user.id), html: { method: :delete }, remote: true) do |f| %>
    <%= f.submit "Unfollow", class: "btn-default" %>
<% end %>

<%= form_for(current_user.active_relationships.build, remote: true) do |f| %>
    <div><%= hidden_field_tag :followed_id, user.id %></div>
    <%= f.submit "Follow", class: "btn" %>  
<% end %>

$("#follow_form-<%= @user.id %>").html("<%= escape_javascript(render(partial: 'users/unfollow', locals: { user: @user })) %>");

$("#follow_form-<%= @user.id %>").html("<%= escape_javascript(render(partial: 'users/follow', locals: { user: @user })) %>");