I have developed a Rails application that functions as a to-do list manager. The app consists of projects, each project contains tasks like the 1st task, 2nd task, and 3rd task, with subtasks associated with each task.

Each subtask is linked to a Bootstrap modal and a dropdown. However, I am currently facing an issue where creating a new subtask through an AJAX request results in the creation of the subtask and its associated modal, but the dropdown for the new subtask is not generated.

I'm puzzled by this behavior, as both the modal and dropdown code are located within the same partial. Here is the code snippet for the task partial (tasks/_task.html.erb):

<div class="col-xs-12 col-sm-5 col-md-5 col-lg-5  tasks" id='tasks_<%=task.id %>'>
 <div class="addtaskdiv" id="addtaskdiv_<%=task.id %>">

<p><b>

    <%=task.taskname %>
</b>


<span style="float:right;margin-right:10px;" data-toggle="modal" data-target="#myModal"><%=link_to '',edit_task_path(task),class:'fa fa-pencil-square-o' %></span>
</p>
<div class="addtaskmovable">
    <% task.subtasks.each do |subtask| %>
        <%=render :partial=>subtask%>


        <%end%>
</div>//end of addtaskmovable




</div>//end of addtaskdiv
<div class="subtaskform" id="subtask_form_<%=task.id %>" style="width:218px;margin:0 2px 0px 3px;">

    <%= form_for [task, task.subtasks.build],:remote => true,:html => {
                        :id => task.id, :class => 'elm_class'
                         } do |f| %>

        <%= f.text_area :name,rows:'3',cols:'3',:class=>'myarea'%>

        <%= f.submit "save",class:'btn btn-mini btn-success col-md-4' %>
        <a data-id='<%=task.id %>' href="#"><i class="fa fa-times fa-lg" style="margin:10px auto;"></i></a>

    <% end %>

    </div>//end of subtaskform

    <p class="addcard" id="addcard_<%=task.id%>"><a href="#" data-id='<%= task.id %>' id='add_card_<%= task.id %>'>Add a card...</a></p>
</div>//end of task div

Here is the subtask partial in subtasks/_subtask.html.erb:

<%=render 'layouts/modal',:subtask=>subtask %>


<div class="dropdown" id="dropdownmenu<%=subtask.id %>"> 


<a data-id='<%=subtask.id %>' data-target="#" style="float:right;" class="dropdown-toggle" id='dropdownMenu<%=subtask.id %>' data-toggle="dropdown"><i class="fa fa-pencil-square-o" style="margin-right:10px;margin-top:10px;"></i></a>
<p class="subtask" data-toggle="modal" data-target="#myModal_<%=subtask.id %>"> 
<%=subtask.name %>
</p>


<%=render 'subtasks/dropdown',:subtask=>subtask %>
</div>

And here is the dropdown code that is not rendering properly for the new subtasks:

<ul class="dropdown-menu" id="dropdown<%=subtask.id %>" aria-labelledby="dropdownMenu<%=subtask.id %>">
          <li><a href="#">Action</a></li>
          <li><a href="#">Another action</a></li>
          <li><a href="#">Something else here</a></li>
          <li class="divider"></li>
          <li><a href="#">Separated link</a></li>
        </ul>

Note: The dropdown was rendering correctly with Bootstrap 2, but stopped working when switching to Bootstrap 3.

Finally, here is the ajax code from create.js.erb:

 $('#addtaskdiv_'+ <%<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="ae93eedacfddc580c7ca">[email protected]</a> %>).append('<%=j render partial: "subtasks/subtask", object: @subtask %>');
 $(":input:not(input[type=submit])").val("");
 $('#subtask_form_'+<%<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="9aa7daeefbe9f1b4f3fe">[email protected]</a> %>).hide(1000);

Lastly, the application.html.erb file contains all the JavaScript code related to drop-down functionality and other features.