javascript - Why is my partial not rails rendering properly? -

i want add comments without having refresh page in app. however, partial no load js functionality implementing.

i getting no errors in log or console, , comment shows once refresh page, not happen without refresh.

also, when write js append last comment win_com id, code works. i'd html dynamically show current state of comment partial via js rather append last comment. appreciated! here's code:

comments_controller.rb:

def create     @window = window.find(params[:window_id])     @comment = @window.comments.build(comment_params)     @comment.user_id = current_user.id      if @comment.save         respond_to |format|             format.html { redirect_to post_path(@post) }             format.js          end     end end 

views/windows/show.html.erb: (part of larger view)

<div class="row col-md-7" id="win_com">     <h4>user comments</h4>     <%= render partial: '/windows/comment', collection: @comments %> </div> 

views/windows/_comment.html.erb:

<div class="container">     <div class="row col-md-7">         <p><%= comment.body %></p>          <p><%= link_to "delete", [comment.window, comment], method: :delete,                                                             data: {confirm: "are sure?"} %></p>     </div> </div> 

views/comments/create.js.erb:

$('#win_com').html("<%= j render(partial:'/windows/comment', collection: @comments)%>"); 

application.js:

//= require jquery //= require jquery_ujs //= require bootstrap-sprockets //= require turbolinks //= require_tree . 

maybe key lines sever log?:

rendered windows/_comment.html.erb (0.0ms) rendered comments/create.js.erb (1.8ms) 

you missing @comments instance variable in controller action create. rails cannot magically know unless specify it. change create action this.

def create     @window = window.find(params[:window_id])     @comment = @window.comments.build(comment_params)     @comment.user_id = current_user.id      if @comment.save         @comments = @post.comments //given defined.          respond_to |format|             format.html { redirect_to post_path(@post) }             format.js          end     end end