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SimpleForm with Rails Summary Notes

Forms are a very common element of all web application so it's a good idea to have easy ways to generate forms. Rails comes with excellent views helpers: form_tag and form_for that help us generate forms. That said, there are even easier ways to generate forms using the SimpleForm gem. There is also another gem Formtastic that does something similar.

Setting Up

We start setting up SimpleForm by adding the gem to our Gemfile:

gem 'simple_form'

Then run bundle to install the gem. Then run

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Deploying to Heroku

You need to use a gem called bundler, before deploying to Heroku. Create a new file in your app's main directory called Gemfile (with a capital 'G' and no extension). This Gemfile will allow us to require all the gems we need in one file, rather than manually requiring all the gems we need in our app.rb. Here we will use gem instead of require

# Gemfile
source 'http://rubygems.org'

gem 'sinatra'
gem 'pony'
gem 'data_mapper'
gem 'dm-postgres-adapter' # Note: Heroku only uses postgres

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To have launchd start postgresql at login:
mkdir -p ~/Library/LaunchAgents
ln -sfv /usr/local/opt/postgresql/*.plist ~/Library/LaunchAgents


Then to load postgresql now:
  launchctl load ~/Library/LaunchAgents/homebrew.mxcl.postgresql.plist

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for number in 1..100
  if number % 3 == 0 && number % 5 == 0
    puts "FIZZBUZZ"
  elsif number % 3 == 0
    puts "FIZZ"
  elsif number % 5 == 0 
    puts "BUZZ"
  else
    puts number
  end

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# ruby 1.8.7 compatible
require 'rubygems'
require 'irb/completion'

# interactive editor: use vim from within irb
begin
  require 'interactive_editor'
rescue LoadError => err
  warn "Couldn't load interactive_editor: #{err}"
end

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class TriangleClimber

  def initialize(size = nil, grid = nil)
    @possible_ways = 0
    @grid = grid ? grid.inject([]) {|r,e| r << e.strip.split(" ")}.reverse : nil
    @size = size || @grid.size
  end

  def find_possible_climbing_ways
    0.upto(@size - 1) {|x| move([0, x]) unless grid_has_trap?([0, x])}

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# ruby 1.8.7 compatible
require 'rubygems'
require 'irb/completion'

# interactive editor: use vim from within irb
begin
  require 'interactive_editor'
rescue LoadError => err
  warn "Couldn't load interactive_editor: #{err}"
end

tkbeili

1- Decide which one is the “parent” and which one is the “child”. So the parent has_many children
2- If you are using SQL database add a column to the child ActiveRecord model named parent_id
3- In the parent ActiveRecord model add has_many :children (notice we used plural in here)
4- In the child ActiveRecord model add belongs_to :parent (notice we used singular in here)
5- (optional) Change the child controller to be nested from the parent’s controller in order to re-use methods (mostly for before_filter) by:
    a- Makes the routes for the child  controller nested inside the “show” action of parent controller
    b- Make the child controller inherit from the parent controller.
    c- Setup filters as needed
    d- Change URLs relating to child controller around your app.

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require 'spec_helper'

describe "Questions" do
  describe "GET /questions" do
    it "Should respond with success to /quetsions" do
      get questions_path
      response.status.should be(200)
    end
  end