def show
    @posts = @group.posts.order(upd_at: :desc).includes(:user).includes(comments: :user).paginate(page: params[:page], per_page: 10)
  end

<h1>Groupe <%= @group.name %></h1>
<div class="post_list<%=@group.id%>">
  <%= render @posts %>
</div>
<%= will_paginate @posts, renderer: BootstrapPagination::Rails %>

<% @comments = post.comments %>
<ul id="comment_list<%=post.id%>">
  <%- if @comments.any? %>
    <%= render @comments, post: post %>
    <%= will_paginate @comments, renderer: BootstrapPagination::Rails %>
  <% end %>
</ul>