Ranking in rails

ranking, ruby-on-rails

Solution

I'm guessing you want to use a counter cache.

`Event.rb`:

class Event < ActiveRecord::Base
  belongs_to :user, counter_cache: true
end

`ranking.html.erb`:

<tr>
  <% User.order(events_count: :desc).each do |user| %>
    ...

Problem

I want to create a ranking of users. It should sort users descending by count of added events. That's my files: User.rb: ``` class User < ActiveRecord::Base has_many :events #... end ``` ranking.html.erb: ``` <tr> <% User.all.each do |user| %> <td> <%= user.name %></td> <td> <%= user.events_count %></br></td> <% end %> </tr> ``` schema.rb: ``` create_table "users", force: true do |t| #... t.integer "events_count", default: 0 end ``` How to do it?

Original source