matthuhiggins

def named_conditions(name, conditions, &block)
  named_scope(name, case conditions
      when Hash
        {:conditions => conditions}
      when Proc
        lambda { |*args| {:conditions => conditions.call(*args)} }
    end, &block)
end

matthuhiggins

module StrictlyUntyped
  module ConditionsScope
    # Makes it easy to add scopes which are only conditions.
    # 
    # For example, 
    #  class Person < ActiveRecord::Base
    #    named_scope :active, :conditions => {:active => true}
    #  end
    # 
    # Can be replaced with

matthuhiggins

class ActiveRecord::Base
  named_scope :conditions, lambda { |*args| {:conditions => args} }
end

matthuhiggins

class Article < ActiveRecord::Base
  belongs_to :author
  after_create do |article|
    if article.title.blank?
      article.title = "#{article.author.first_name}'s article about Rails 3"
    end
  end
end

matthuhiggins

class Article < ActiveRecord::Base
  belongs_to :author
  after_create do
    if title.blank?
      self.title = "#{author.first_name}'s article about Rails 3"
    end
  end
end

matthuhiggins

module Awesomeness
  def self.include(model_klass)
    model_klass.class_eval do
      extend ClassMethods
      include InstanceMethods
      named_scope :awesome, :conditions => {:favorite_language => 'ruby'}
    end
  end

  module ClassMethods

matthuhiggins

module Awesomeness
  extend ActiveSupport::Concern

  included do
    scope :awesome, where(:favorite_language => 'ruby')
  end

  module ClassMethods
    def make_everyone_awesome
      update_all(:favorite_language => 'ruby')

matthuhiggins

class Post < ActiveRecord::Base
  def title=(value)
    self[:title] = value.present? ? value : 'Untitled'
  end
end

matthuhiggins

class Post < ActiveRecord::Base
  def title=(value)
    self[:title] = value.presence || 'Untitled'
  end
end

matthuhiggins

google_paths = {
  'prototype' => 'http://ajax.googleapis.com/ajax/libs/prototype/1.6.0.2/',
  'controls'  => 'http://ajax.googleapis.com/ajax/libs/scriptaculous/1.8.1/',
  'dragdrop'  => 'http://ajax.googleapis.com/ajax/libs/scriptaculous/1.8.1/',
  'effects'   => 'http://ajax.googleapis.com/ajax/libs/scriptaculous/1.8.1/'
}

config.action_controller.asset_host = Proc.new do |source, request|
  google_asset = google_paths.keys.detect { |asset| source.starts_with?("/javascripts/#{asset}") }
  google_asset ? google_paths[google_asset] : "#{request.protocol}#{request.host_with_port}"