m-renaud

customDecoder decoder toResult = 
   Json.andThen
             (\a ->
                   case toResult a of 
                      Ok b -> Json.succeed b
                      Err err -> Json.fail err
             )
             decoder

umuro

Preperation

Installation

• Install Elixir: http://elixir-lang.org/install.html
• Install Phoenix http://www.phoenixframework.org/docs/installation

sudo apt-get install inotify-tools #ubuntu
sudo apt-get install postgresql #Ubuntu

mix local.hex #install hex
mix archive.install https://github.com/phoenixframework/archives/raw/master/phoenix_new.ez #phoenix archive

umuro

# Creates a demo blog in a new hobo project
# Usage: rake rails:template LOCATION=template_demo_blog_hobo.rb
# Or: rake rails:template LOCATION=https://raw.github.com/gist/3405055/9aaac7c1c9e9571b32c4359fa9fff77c89de82a9/template_demo_blog_hobo.rb

say ("Installing gems so that we can scaffold...")
run 'bundle install'
generate 'hobo:setup_wizard' if yes? "Wanna run hobo:setup_wizard?"

generate 'hobo:resource', 'Post title:string text:text'

umuro

# kate: syntax ruby;
# -*- mode: ruby -*-
# vi: set ft=ruby :

require 'rubygems'
require 'thor'

class Gemset < Thor
  include Thor::Actions

umuro

# kate: syntax ruby;
# -*- mode: ruby -*-
# vi: set ft=ruby :

# Add those comments to colorize non-rb files automatically. It happens that not all ruby files have the rb extension.

runemadsen

Polymorphic Associations reversed

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.

umuro

# kate: syntax ruby;
# -*- mode: ruby -*-
# vi: set ft=ruby :

# IRB improvements: Command history, coloring, more shell like commands cd, pwd, dir, cat
# Use powerful shell commands
# dir
# dir '**/*.rb'
# cd 'app'
# pwd