ismasan

# Create ActiveRecord schemas on the fly for AR extensions testing
#
ActiveRecord::Base.establish_connection(
  :adapter=>'sqlite3',
  :dbfile=> File.join(File.dirname(__FILE__),'..','spec','db','test.db')
)
# define a migration
class TestSchema < ActiveRecord::Migration
  def self.up
    create_table :items do |t|

ismasan

module BlahPlugin
  VERSION = '1.0.0'
  
  class << self
    # add plugin to AR only if it hasn't been included before, 
    # which may cause stack-level-too-deep errors if you're aliasing methods
    #
    def enable_activerecord
      return if ActiveRecord::Base.respond_to? :acts_as_blah
      ActiveRecord::Base.extend BlahPlugin::Macro

ismasan

# we want /posts, /posts/published, /posts/drafts, etc. without too much duplication

# model
class Post < ActiveRecord::Base
  named_scope :published, lambda {{:conditions => ...}}
  named_scope :draft, lambda {{:conditions => ...}}
  named_scope :expired, lambda {{:conditions => ...}}
  named_scope :upcoming, lambda {{:conditions => ...}}
end

ismasan

# Easy ActiveRecord sorting with named_scopes and resources_controller
# this goes in your initializers, lib directory or as a plugin
module ClassMethods
  def sortable_with(*fields)
    sorts = fields.inject({}) do |h,f|
      h[:"#{f}_asc"] = "#{f} ASC"
      h[:"#{f}_desc"] = "#{f} DESC"
      h
    end
    write_inheritable_attribute(:sortable_fields,sorts)

ismasan

# this facades a model with all helpers and controller data available
#
class RssModel
  
  def initialize(model, request, controller)
    @model, @request, @controller = model, request, controller
  end
  
  # you have request available as well
  #

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module Spec
  module Rails
    module Matchers
 
      def have_sane_through_associations
        return simple_matcher(":through associations not to have the :dependent options}") do |model|
          model = model.class if model.is_a? ActiveRecord::Base
          not model.reflect_on_all_associations.any?{|a| a.options[:through] && a.options[:dependent]}
        end
      end

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class Post < ActiveRecord::Base
  belongs_to :user
  belongs_to :shop

  named_scope :by_author, lambda {|user_id|
    return {} if user_id.blank?
    {:conditions => {:user_id => user_id}}
  }
  
  named_scope :like, lambda {|q|

ismasan

# Put this in an initializer (config/initializers/common_scopes.rb) or library file.
#
module CommonScopes

  module ClassMethods
    # Sort given fields ASC or DESC
    #
    # Example:
    #
    # class Post < ActiveRecord::Base

ismasan

# Cache Headers
# Middleware for configuring HTTP cache policy headers in Rack based web applications.
# Apply cache headers to HTTP responses corresponding to requests that match defined
# URI patterns. 
# 
# Example usage:
# 
#   use Rack::CacheHeaders
# 
#   Rack::CacheHeaders.configure do |cache|

ismasan

class ManyLevels
  extend HashMapper
  map from('/name'),            to('/tag_attributes/name')
  map from('/properties/type'), to('/tag_attributes/type')
  map from('/tagid'),           to('/tag_id')
  map from('/properties/egg'),  to('/chicken')
end

input =      {
  :name => 'ismael',