Rating in rails

Question

I want to create a user rating. It should sort users by the number of events added.

What are 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?

Answer 1

I assume you want to use a cache counter.

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| %>
    ...