How to update feed using ajax in Rails 4.0 - ajax

Question

I am trying to create an ajax functionality for a sample app of michael heart book . I created a feed model controller which is micropost in hear book . I am trying to use ajax like post feed method . But I am getting some error . I am attaching my code below take a look and help me .
#feeds_controller.erb
class FeedsController < ApplicationController
before_action :authenticate_user! ,only: [:create, :destroy]
def create
#feed = current_user.feeds.build(feed_params)
if #feed.save
flash[:success] = "Micropost created!"
#redirect_to root_url
respond_to do |format|
format.html { redirect_to root_url }
format.js
else
#feed_items = []
render 'static_pages/home'
end
end
def destroy
end
private
def feed_params
params.require(:feed).permit(:content)
end
end
And my home page is rendering some partials Here is the code :
#static_pages/home.html.erb
<% if user_signed_in? %>
<div class="row">
<aside class="col-md-4">
<section class="user_info">
<%= render 'shared/user_info' %>
</section>
<section class="stats">
<%= render 'shared/stats' %>
</section>
</aside>
<div class="col-md-8">
<h3>Micropost Feed</h3>
<section class="micropost_form">
<%= render 'shared/feed_form' %>
</section>
<%= render 'shared/feed' %>
</div>
</div>
<% else %>
<% end %>
Here are two codes Everything work perfectly but when I am trying to add ajax I get the error which is :
Rendered shared/_feed.html.erb (3.1ms)
Rendered feeds/create.js.erb (6.0ms)
Completed 500 Internal Server Error in 73ms (ActiveRecord: 44.4ms)
NoMethodError (undefined method `any?' for nil:NilClass):
app/views/shared/_feed.html.erb:1:in `_app_views_shared__feed_html_erb___516512175__638262078'
app/views/feeds/create.js.erb:1:in `_app_views_feeds_create_js_erb___967625174__637838198'
app/controllers/feeds_controller.rb:9:in `create'
To execute ajax on create method I added these files unders feeds views file name is create.js.erb
$("#feed_add").html("<%= escape_javascript(render partial: "shared/feed") %>");
And form file is under shared view file with name _feed_form.html.erb
<%= form_for(#feed,:remote => true) do |f| %>
<div id="feed_add">
<%= f.text_area :content, placeholder: "Compose new feed..." %>
</div>
<%= f.submit "Post", class: "btn btn-primary" %>
<% end %>
#_feed.html.erb
<% if #feed_items.any? %>
<ol class="microposts">
<%= render #feed_items %>
</ol>
<%= will_paginate #feed_items %>
<% end %>
So tell me how can I add feed and without refreshing how can I show feed using partial In this code .

Answer 1

Here you simply need to render one thing that is feed for that in micheal heart book you simply add this line of code inside your create ajax file here is the code :
$(".microposts").prepend('<%= j render #feed %>');
Here you can get the result what you want .