APIs are becoming an essential feature of modern web applications. Rails does a good job of helping your application provide an API using the same MVC structure you're accustomed to.
Let's work with the following example controller:
class ArticlesController < ApplicationController
It's pretty easy to do polymorphic associations in Rails: A Picture can belong to either a BlogPost or an Article. But what if you need the relationship the other way around? A Picture, a Text and a Video can belong to an Article, and that article can find all media by calling @article.media
This example shows how to create an ArticleElement join model that handles the polymorphic relationship. To add fields that are common to all polymorphic models, add fields to the join model.
| #!/bin/bash | |
| # CentOS rbenv system wide installation script | |
| # Forked from https://gist.github.com/1237417 | |
| # Installs rbenv system wide on CentOS 5/6, also allows single user installs. | |
| # Install pre-requirements | |
| yum install -y gcc-c++ patch readline readline-devel zlib zlib-devel libyaml-devel libffi-devel openssl-devel \ | |
| make bzip2 autoconf automake libtool bison iconv-devel git-core |
| This playbook has been removed as it is now very outdated. |
| #!/usr/bin/env python | |
| """ | |
| How to use it: | |
| 1. Just `kill -2 PROCESS_ID` or `kill -15 PROCESS_ID` , The Tornado Web Server Will shutdown after process all the request. | |
| 2. When you run it behind Nginx, it can graceful reboot your production server. | |
| 3. Nice Print in http://weibo.com/1682780325/zgkb7g8k7 | |
| """ |
| # The initial was for Varnish 2.1, this has been updated for Varnish 3. | |
| # The upgrade changes were based on the docs here: | |
| # https://www.varnish-cache.org/docs/3.0/installation/upgrade.html | |
| # https://www.varnish-cache.org/docs/2.1/tutorial/vcl.html | |
| # https://www.varnish-cache.org/trac/wiki/VCLExamples | |
| # Summary | |
| # 1. Varnish will poll the backend at /health_check to make sure it is | |
| # healthy. If the backend goes down, varnish will server stale content |
This is a proposal for a lightning talk at the Reactive 2016 conference. If you like this, star the Gist.
In regular websites, it is common to send multiple events to track user clicks. Single Page Applications change the way you look at metrics. This is a talk about a simple pattern we created at Globo.com to manage a metrics layer for http://globoplay.globo.com. The talk will cover how to track user flow using Google Analytics and other services. We solved the challenge of tying metrics and components, keeping information across pages and having global data. Also some React, React Router and React Side Effects concepts like context, higher order components, history state will be covered.