bokmann

# Mel,
# 
#   Sorry, I read too much of a previous problem I had into your question and
# probably spun you off in the wrong direction.  Jim's comment points you in
# the right direction, but its only going to get you so far because of a
# limitation in combining polymorphism and HasManyThrough.  You will run into
# this error trying to do what you want to do:
#   
#   http://rubydoc.info/github/rails/rails/master/ActiveRecord/HasManyThroughAssociationPolymorphicSourceError
#   

bokmann

# Mel, Here is another gist for you, perhaps slightly better than the last.
# First, the migrations are exactly the same, but this improves the left-right
# situation slightly.

# kit.rb
class Kit < ActiveRecord::Base
  has_many :peer_kit_relations,
           :class_name => "KitRelation",
           :foreign_key => :left_kit_id
  

bokmann

# Mel,  This is fugly, but it has the benefit of only using
# activerecord relations - here's why:
# 
# Using the has_many :through technique, we need to account for the
# possibility of the 'peer' being in either of the two 'belongs_to'
# relationships in the relation.  To keep ourselves mentally straight
# in this, the code refers to them as the 'left' and 'right' side.
# We need to do two queries and join them to get all the possible peers.
# There is a potentially better, but more complex solution to I'll
# outline below:

bokmann

# This is the code from my 'There is No Such Thing as Metaprogramming' talk,
# which premiered at the Arlington, VA Ruby Users Group on Feb 22nd.
# Without the deliver and walk-through to the solution below this example
# will be missing quite an important bit of content (mainly the tracking of
# 'self' while developing the solution, but it still a useful read.

# Here is the Toddler with no metajuju. Note that the developer, as well as
# the code, is completely unuaware of the interpreter. A developer with a
# background in compiled languages would be comfortable looking at this.

bokmann

Code

$("button").single_double_click(function () {
  alert("Try double-clicking me!")
}, function () {
  alert("Double click detected, I'm hiding")
  $(this).hide()
})

bokmann

# Two things are important to note: 
#
# 1) The code is fugly, because it was a JavaScript/iPad experiment. 
#    I know that it is ugly, so pretty please don't comment on that part.
# 2) I tried to use as many CoffeeScript features as possible,
#    including but not limited to list comprehensions,
#    heredocs, destructuring assignment and also the "do" operator
#
# I welcome comments about stuff that is not CoffeeScripty enough, or what I should
# write differently.

bokmann

# require the libraries to make it all work
require 'rubygems'
require 'active_support'
require 'business_time'

# What time is it now?  Of course, this will be different
# for you, so your relative answrs below will vary
# accordingly:
Time.now

bokmann

class YourTypicalWorkitem < ActiveRecord::Base
  include StonePath
  
  stonepath_workitem do

    aasm_initial_state :data_entry

    aasm_state :data_entry
    aasm_state :data_validation
    aasm_state :further_processing

bokmann

def create
  unless @commentable.nil?
    @comment = @commentable.comments.create!(params[:comment])
    respond_to do |format|
      format.html { redirect_to @commentable }
      format.json { @commentable.to_json }
      format.partial { render :partial => "comments/comment.html.erb",
                              :object => @comment,
                              :layout => false }
    end

bokmann

Mime::Type.register "text/html-partial", :partial