blowmage

=== 1.0.0 / 2012-09-25

* 1 major enhancement

  * Birthday!

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.

blowmage

class TasksController < ApplicationController
  def update
    if @task.update_attributes(params[:task])
      TaskPusher.new(@task, socket_id).push_changes
      TaskMailSender.new(@task, current_user).deliver_email
      # success response
    else
      # failure respond
    end
  end

blowmage

class TasksController < ApplicationController
  def update
    if @task.update_attributes(params[:task])
      tracker = PostSaveTaskTracker.new(@task)
      TaskPusher.new(tracker, socket_id).push_changes
      TaskMailSender.new(tracker, current_user).deliver_email
      # success response
    else
      # failure respond
    end

blowmage

class TasksController < ApplicationController
  def update
    if @task.update_attributes(params[:task])
      tracker = PostSaveTaskTracker.new(@task)
      TaskPusher.new(tracker, socket_id).push_changes
      TaskMailSender.new(tracker, current_user).deliver_email
      # success response
    else
      # failure respond
    end

blowmage

[vagrant@precise32:/vagrant (master)]$ echo "using search_exec"
using search_exec
[vagrant@precise32:/vagrant (master)]$ rspec spec/models/user_search_spec.rb 
/usr/local/rvm/gems/ruby-1.9.3-p374/gems/activesupport-3.2.11/lib/active_support/dependencies.rb:251:in `block in require': iconv will be deprecated in the future, use String#encode instead.
/vagrant/vendor/gems/message_bus/lib/message_bus.rb:130: warning: already initialized constant ENCODE_SITE_TOKEN

== Seed from /vagrant/db/fixtures/post_action_types.rb
 - PostActionType {:id=>1, :name_key=>"bookmark", :is_flag=>false, :position=>1}
 - PostActionType {:id=>2, :name_key=>"like", :is_flag=>false, :icon=>"heart", :position=>2}
 - PostActionType {:id=>3, :name_key=>"off_topic", :is_flag=>true, :position=>3}

blowmage

module MiniTest
  module Assertify
    module Lifecycle # :nodoc:
      # Hook into Minitest's Lifecycle to alias methods when tests are run.
      def before_setup # :nodoc:
        self.class.public_instance_methods.grep(/\Arefute_/).each do |method|
          new_method = method.to_s.sub("refute_", "assert_not_").to_sym
          class_eval do
            alias_method new_method, method
          end

blowmage

# my preferred prompt - ☣ [pairwithme:rails4] $
PS1='\[\e[1;31m\]☣ [\W$(if [ -n "$OMG_NAME" ]; then eval "echo :$OMG_NAME"; fi)] $\[\e[0m\] '

# chruby configuration
source /usr/local/share/chruby/chruby.sh
source /usr/local/share/chruby/auto.sh

# set default ruby
chruby 2.1

blowmage

require "minitest/autorun"
require "thor"
require "fakefs/safe"

class SampleGenerator < Thor::Group
  include Thor::Actions
  def start *args
    template "foo.erb", "new/path/here/foo.rb"
  end
end

blowmage

Keybase proof

I hereby claim:

• I am blowmage on github.
• I am blowmage (https://keybase.io/blowmage) on keybase.
• I have a public key whose fingerprint is 7FC4 001A B3B0 FFBA 60FD E278 861B B5BD 2A72 06AF

To claim this, I am signing this object: