javascript - Ajax "link_to"发送多个请求 Controller 请求时点击非常快(Rails 4)

Question

在我解释我的问题之前，我会提供上下文的相关代码。我有一个与记分牌模型相关联的团队模型。手头的问题与团队有关。

The View for Teams 索引

<div class="team-list">
    <%= render @scoreboard.teams.reject(&:new_record?) %>
</div>

@scoreboard.teams 的部分内容

<div class="row team-div" id="team_<%=team.id%>">
    <div class="col-xs-3 team-div-1"> <%= team.name %> </div>

     <%= link_to (edit_scoreboard_team_path(@scoreboard, team)), remote: true do %>
       <div class="col-xs-6 team-data">
        <div class="row">
            <div class="col-xs-4 team-div-2"><%= team.win %> </div>
            <div class="col-xs-4 team-div-2"><%= team.loss %> </div>
            <div class="col-xs-4 team-div-2"><%= team.tie %></div>
        </div>
       </div>
    <% end %>

    <div class="col-xs-1 team-div-2">
        <%= team.win + team.loss + team.tie %>
    </div>

    <div class="col-xs-1 team-div-2">
      <% total_games = team.win.to_i + team.loss.to_i + team.tie.to_i %>
    <% if total_games == 0 %>
     <%= "N/A" %>
    <% else %>
     <%= (team.win.to_i/(total_games).to_f*100).round(2) %><%="%"%>
    <% end %>
    </div>

    <div class="col-xs-1 team-setting">
             <i class="fa fa-trash-o fa-lg" aria-hidden="true"></i> 
    </div>

</div>

我遇到问题的链接是编辑方法。

团队#edit Controller 方法

  def edit
    @scoreboard = Scoreboard.find(params[:scoreboard_id])
    @team = @scoreboard.teams.find(params[:id])
    respond_to do |format|
     format.html {redirect_to scoreboard_url(@team.scoreboard_id)}
     format.js
     end
   end

edit.js.erb 文件

$("#team_<%=@team.id%>").hide();
$("#team_<%=@team.id%>").before("<%= j render 'teamedit'%>");

现在，解释一下问题。我在开发环境中。在一个完美的世界中，我想点击 link_to 进行编辑，让特定的团队 div 立即消失(只是这样我就不能再次点击它)并呈现该团队的编辑表单。但是，在缓慢加载期间(经常发生)，我可以点击 link_to 两次或三次，它会调用多个 Controller 请求到 edit 方法。这样做的问题是，Jquery 的执行次数与我单击的次数一样多，我最终为同一元素得到 2 或 3 种形式。

例如，当我在 Id=50 的团队的 link_to 上快速点击时，这些是日志文件:

Started GET "/scoreboards/1/teams/50/edit" for 99.239.140.167 at 2016-04-30 08:07:52 +0000
Processing by TeamsController#edit as JS
  Parameters: {"scoreboard_id"=>"1", "id"=>"50"}
  User Load (0.6ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 LIMIT 1  [["id", 1]]
  Scoreboard Load (0.3ms)  SELECT  "scoreboards".* FROM "scoreboards" WHERE "scoreboards"."id" = $1  ORDER BY "score oards"."created_at" DESC LIMIT 1  [["id", 1]]
  Team Load (0.3ms)  SELECT  "teams".* FROM "teams" WHERE "teams"."scoreboard_id" = $1 AND "teams"."id" = $2 LIMIT 1  [["scoreboard_id", 1], ["id", 50]]
  Rendered teams/_teamedit.html.erb (3.1ms)
  Rendered teams/edit.js.erb (7.1ms)
Completed 200 OK in 35ms (Views: 27.6ms | ActiveRecord: 1.2ms)


Started GET "/scoreboards/1/teams/50/edit" for 99.239.140.167 at 2016-04-30 08:07:52 +0000
Processing by TeamsController#edit as JS
  Parameters: {"scoreboard_id"=>"1", "id"=>"50"}
  User Load (0.3ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 LIMIT 1  [["id", 1]]
  Scoreboard Load (0.4ms)  SELECT  "scoreboards".* FROM "scoreboards" WHERE "scoreboards"."id" = $1  ORDER BY "scoreboards"."created_at" DESC LIMIT 1  [["id", 1]]
  Team Load (0.3ms)  SELECT  "teams".* FROM "teams" WHERE "teams"."scoreboard_id" = $1 AND "teams"."id" = $2 LIMIT 1  [["scoreboard_id", 1], ["id", 50]]
  Rendered teams/_teamedit.html.erb (2.1ms)
  Rendered teams/edit.js.erb (5.6ms)
Completed 200 OK in 30ms (Views: 24.2ms | ActiveRecord: 1.0ms)

每个请求都呈现 edit.js.erb 所以我最终得到了两种形式。 我怎样才能做到无论我在“link_to”消失之前点击多少次，都只会为该资源生成一个编辑表单？

Answer 1

您可以通过使用 jQuery 在第一次点击时禁用链接来解决这个问题。

给链接添加类

<%= link_to (edit_scoreboard_team_path(@scoreboard, team)), remote: true, class: "team-edit-link" do %>
  ...
<% end %>

单击时禁用链接

$('.team-edit-link').click(function(e) {
  if($(this).hasClass('disabled')){
    e.preventDefault();
  }
  else{
    $(this).addClass('disabled');
  }
});