30 Oct '16, 8pm

Rails Implementation of a Ranking System using Postgres Window Functions:

Rails Implementation of a Ranking System using Postgres Window Functions:

Hello, this article will show, how easily you can add ranking functionality to your project. We will accomplish it, with the use of ntile() window function. I will be using Ruby on Rails for my application, with PostgreSQL database. We will need: a model with integer attribute, by which we want to make the ranking (in my case, it’s visit_count ). Here is an exemplary migration for Post model: class CreatePosts < ActiveRecord::Migration[5.0] def change create_table :posts do |t| t.timestamps t.string :title t.integer :visit_count t.string :description end end end controller, class PostsController < ApplicationController def index @posts = # We will retrieve our collection here, but not now, we will get back to this later end end route for resource, Rails.application.routes.draw do resources :posts, only: :index end view for our index action and partial for post # index.html...

Full article: http://naturaily.com/blog/post/ruby-on-rails-implementati...

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