blowmage

Presenters in Rails

I have bemoaned the lack of a ViewModel in Rails many times, and I prefer using Presenters to simulate a ViewModel. But it turns out there is an object that does represent the state of the view in Rails apps. Its an instance of ActionView::Base that the controller calls view_context. We don't have much control of this object, but it seems like a logical place to put our view-specific behavior.

This code is an attempt at creating Presenters using modules. The module will be mixed into the view_context object. This is very similar to how a Decorator module will be mixed into a model object, only instead of being specific to the model is it specific to the view.

This means that testing your presenter is no different than testing any other module. So relying on dependencies such as other methods or instance variables can make testing difficult.

josevalim

Sinatra like routes in Rails controllers

A proof of concept of having Sinatra like routes inside your controllers.

How to use

Since the router is gone, feel free to remove config/routes.rb. Then add the file below to lib/action_controller/inline_routes.rb inside your app.

rixth

function random-mac() {
  local interface="${1:-en0}"
  local old_addr=`ifconfig $interface |grep ether|awk '{print $2}'`
  local new_addr=`ruby -e "puts ('%02x' % ((rand 64)*4|2))+(0..4).inject('') {|s,x| s + ':%02x' %(rand 256)}"`
  `sudo ifconfig $interface ether $new_addr`
  if [ $? -eq 0 ]; then
    echo "Switched mac address on $interface to $new_addr from $old_addr"
  else
    echo "FAILED TO SWITCH MAC ADDRRESS ON $interface"
  fi

dhh

class ActionDispatch::Routing::Mapper
  def draw(routes_name)
    instance_eval(File.read(Rails.root.join("config/routes/#{routes_name}.rb")))
  end
end

BCX::Application.routes.draw do
  draw :api
  draw :account
  draw :session

wycats

class TicketsController < ApplicationController
  def show
    tickets = params[:tickets].split(",")

    ticket_data = tickets.map do |ticket|
      parallel { Faraday.get("http://tickets.local/#{ticket}") }
    end

    render json: { tickets: ticket_data.map(&:result) }
  end

ahawkins

#!/usr/bin/env ruby

# This is a basic deploy script for Heroku apps.
# It provides a structure you can use to expand on
# and add your own prereqs and deploy tasks.
#
# It basically ensures that:
# 1. There are no uncommited files
# 2. You can ssh to github
# 3. You can connect to heroku

anthonyshort

// Media Queries in Sass 3.2
//
// These mixins make media queries a breeze with Sass.
// The media queries from mobile up until desktop all 
// trigger at different points along the way
//
// And important point to remember is that and width
// over the portrait width is considered to be part of the
// landscape width. This allows us to capture widths of devices
// that might not fit the dimensions exactly. This means the break

tenderlove

Encoding.default_internal = 'UTF-8'
Encoding.default_external = 'ISO-8859-1'

string = [130, 177, 130, 241, 130, 201, 130, 191, 130, 205, 129, 73].pack('C*')
string.force_encoding Encoding::Shift_JIS
p string.encode!

kathgironpe

Naming files and using asset_path

application.scss.erb
- use <%= asset_path 'background.jpg' %>

on config/environments/production.rb

dhh

# autoload concerns
module YourApp
  class Application < Rails::Application
    config.autoload_paths += %W(
      #{config.root}/app/controllers/concerns
      #{config.root}/app/models/concerns
    )
  end
end