ruby on rails - how to sort joined tables? -

help please write orm-request.

tables:

users: id: integer name: varchar  posts: id: integer title: varchar user_id: integer views: integer 

models:

user: class user < activerecord::base   has_many    :posts,  dependent:  :destroy end  posts: class post < activerecord::base   belongs_to  :user end 

controller:

def popular_diary   @users = user.joins(:posts).group_by(:user_id).order('sum(posts.views)') end 

html:

  <% @users.each |user| %>     <div class="row">       <%= link_to user_posts_url(user.id) %>         <div><%= user.name %></div>       <% end %>       </div>   <% end %> 

i need users hatched in order. order ('sum (posts.views)

the problem screen displays following error message:

wrong number of arguments (0 1)

it's group, not group_by

def popular_diary   @users = user.joins(:posts).group(:user_id).order('sum(posts.views)') end