home.html.erb

<% if signed_in? %>
    <div class="row">
      <aside class="span4">
        <section>
          <%= render 'shared/user_info' %>
        </section>
        <section>
          <%= render 'shared/micropost_form' %>
        </section>
      </aside>
      <div class="span8">
        <h3>Micropost Feed</h3>
        <%= render 'shared/feed' %>
      </div>
    </div>
<% end %> 

-- micropost_controller --

class MicropostsController < ApplicationController
  before_filter :signed_in_user

  def create
    @micropost = current_user.microposts.build(params[:micropost])
    if @micropost.save
      flash[:success] = "Micropost created!"
      redirect_to root_url
    else
      @feed_items = current_user.feed.paginate(page: params[:page])
      render 'static_pages/home'
    end
  end

  def destroy
  end
end